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</style><div role="note" class="hatnote navigation-not-searchable">This article is about mobile telephone voice calls and text messaging. For the early computer programming language, see <a href="Short_Code_(computer_language)" title="Short Code (computer language)">Short Code (computer language)</a>. For short telephone numbers for public services, see <a href="Abbreviated_dialing" title="Abbreviated dialing">Abbreviated dialing</a>.</div>

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<p><b><span lang="en">Short</span> codes</b>, or <b>short numbers</b>, are short digit-sequences—significantly shorter than <a href="Telephone_number" title="Telephone number">telephone numbers</a>—that are used to address messages in the <a href="Multimedia_Messaging_System" class="mw-redirect" title="Multimedia Messaging System">Multimedia Messaging System</a> (MMS) and <a href="Short_message_service" class="mw-redirect" title="Short message service">short message service</a> (SMS) systems of <a href="Mobile_network_operator" title="Mobile network operator">mobile network operators</a>.<sup id="cite_ref-twilio_1-0" class="reference"><a href="#cite_note-twilio-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> In addition to messaging, they may be used in <a href="Abbreviated_dialing" title="Abbreviated dialing">abbreviated dialing</a>.

</p><p>Short codes are designed to be easier to read and remember than telephone numbers.<sup id="cite_ref-:0_2-0" class="reference"><a href="#cite_note-:0-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Short codes are unique to each operator at the technological level. Even so, providers generally have agreements to avoid overlaps. In some countries, such as the United States, some classes of numbers are inter-operator (used by multiple providers or carriers). U.S. inter-operator numbers are called <b>common short codes</b>).<sup id="cite_ref-youra_3-0" class="reference"><a href="#cite_note-youra-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>

</p><p>Organisations may set up short codes to encourage users to engage with services such as <a href="Mobile_donating" title="Mobile donating">charity donations</a>, mobile services, ordering <a href="Ringtones" class="mw-redirect" title="Ringtones">ringtones</a>, or television-program voting.<sup id="cite_ref-:0_2-1" class="reference"><a href="#cite_note-:0-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Messages sent to a short code can be billed at a higher rate than a standard SMS and may even subscribe a customer to a recurring monthly service that will be added to the customer's mobile-phone bill until the user texts, for example, the word "STOP" to terminate the service.<sup id="cite_ref-cm-short_4-0" class="reference"><a href="#cite_note-cm-short-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading2"><h2 id="Short_codes_and_service_identifiers_(prefix)">Short codes and service identifiers (prefix)</h2></div>

<p>Short codes are often associated with automated services. An automated program can handle the response and typically requires the sender to start the message with a command word or prefix. The service then responds to the command appropriately.

</p><p>In ads or in other printed material where a provider has to provide both a prefix and the short code number, the advertisement will typically follow this format:

</p>

<ul><li>Example 1 - Long version: Text Football to 72404 for latest football news.</li>

<li>Example 2 - Short version: football@72404</li></ul>

<div class="mw-heading mw-heading2"><h2 id="Regional_differences">Regional differences</h2></div>

<div class="mw-heading mw-heading3"><h3 id="Albania">Albania</h3></div>

<p>Short Codes are five digits in length and start with 5, also are known as short codes for value added service.

</p>

<div class="mw-heading mw-heading3"><h3 id="Australia">Australia</h3></div>

<p>Short codes are six or eight digits in length,<sup id="cite_ref-burst_5-0" class="reference"><a href="#cite_note-burst-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> starting with the prefix "19" followed by an additional four or six digits. Communications Alliance Ltd and WMC Global are responsible for governing premium and standard rate short codes in Australia. Transactional and Subscription services require a double sms MO opt-in or Web based opt-in with an MO reply.

</p>

<div class="mw-heading mw-heading3"><h3 id="Bangladesh">Bangladesh</h3></div>

<p>Codes are five digits in length. <a href="Bangladesh_Telecommunication_Regulatory_Commission" title="Bangladesh Telecommunication Regulatory Commission">Bangladesh Telecommunication Regulatory Commission (BTRC)</a> issues and controls short codes in Bangladesh.

</p>

<div class="mw-heading mw-heading3"><h3 id="Belgium">Belgium</h3></div>

<p>Codes are four digits in length.<sup id="cite_ref-ringring_6-0" class="reference"><a href="#cite_note-ringring-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Botswana">Botswana</h3></div>

<p>Codes are three digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Brazil">Brazil</h3></div>

<p>Codes are five digits in length.<sup id="cite_ref-salesforce-br_7-0" class="reference"><a href="#cite_note-salesforce-br-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Cambodia">Cambodia</h3></div>

<p>Short Codes are four digits in length and start with 1.

</p>

<div class="mw-heading mw-heading3"><h3 id="Canada">Canada</h3></div>

<p>Canadian Common Short Codes can be five or six digits long. Common Short Codes beginning with a leading '4' are reserved for private use by wireless network operators. Four-digit Common Short Codes are not permitted due to handset incompatibilities. Short code-based messages vary between <i>zero-rated</i> (paid for by campaign), <i>standard rate</i> (user is responsible for standard carrier charges), and <i>premium rate</i> (varies, <a href="Canadian_dollar" title="Canadian dollar">C$</a>1-10). Canadian Short codes are governed by the Canadian Wireless Telecommunications Association.<sup id="cite_ref-txt_8-0" class="reference"><a href="#cite_note-txt-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup>

</p><p>In February 2020, CWTA (Canadian Wireless Telecommunications Association) announced that Rogers Wireless will no longer participate in general use mobile codes in the future. A common short code is a code that is shared by more than one brand for multiple or general uses.<sup id="cite_ref-salesforce_9-0" class="reference"><a href="#cite_note-salesforce-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Chile">Chile</h3></div>

<p>Codes are three and four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Czech_Republic">Czech Republic</h3></div>

<p>Messages sent to/from these short codes are known as Premium Rate SMS. Codes are seven digits in length for MO and five (not billed) or eight (billed) for MT direction, starting with nine, while two or three (depending on billing type=MO/MT) trailing digits express the price, e.g. SMS sent to 9090930 is billed for <a href="Czech_koruna" title="Czech koruna">Kč</a>30. Leading three digits are purpose type prefixes (908 for micro payments, 909 for adult content and 900 for everything else), digits at position four and five determines the service provider registered by a network operator. There are also other four digit shortcodes, used by a network operators for service only purposes (operator dependent)

</p>

<div class="mw-heading mw-heading3"><h3 id="Denmark">Denmark</h3></div>

<p>Codes are three or four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Dominican_Republic">Dominican Republic</h3></div>

<p>Codes are four or five digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Ethiopia">Ethiopia</h3></div>

<p>Codes are four digits in length and start with 8, like 8xxx. Although the telecom sector in Ethiopia is controlled by the government, short code services are outsourced to the private sector. The short codes are used mostly for fundraising, lottery and polling.

</p>

<div class="mw-heading mw-heading3"><h3 id="European_Union">European Union</h3></div>

<p>Common EU-wide codes start with 11. Examples include: 118xxx - directory services,<sup id="cite_ref-europa_10-0" class="reference"><a href="#cite_note-europa-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> 116xxx - emergency helplines. This is in addition to the EU-wide emergency number 112.

</p>

<div class="mw-heading mw-heading3"><h3 id="Faroe_islands">Faroe islands</h3></div>

<p>Codes are four digits in length, beginning with "12" or "19".<sup id="cite_ref-faroe_11-0" class="reference"><a href="#cite_note-faroe-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Finland">Finland</h3></div>

<p>Codes are five or more digits in length, usually five or six.

</p>

<div class="mw-heading mw-heading3"><h3 id="France">France</h3></div>

<p>Codes are five digits in length. Starting digits define the cost of the service.

</p>

<div class="mw-heading mw-heading3"><h3 id="Germany">Germany</h3></div>

<p>Codes are four or five digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Greece">Greece</h3></div>

<p>Codes are five digits in length.

</p>

<p>Codes are four to eight digits in length, start with digits 501-509.<sup id="cite_ref-ofca-hk-codes_12-0" class="reference"><a href="#cite_note-ofca-hk-codes-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Emergency number is 992.<sup id="cite_ref-hk-992_13-0" class="reference"><a href="#cite_note-hk-992-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Hungary">Hungary</h3></div>

<p>Codes are four or five digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="India">India</h3></div>

<p>There are many companies in the Indian market who rent keywords, on a monthly basis, whose characters, on a typical <a href="Telephone_keypad" title="Telephone keypad">telephone keypad</a>, represent short codes. Short codes are five digits in length and have to start with the digit '5'. The five digits can be extended by three digits further representing three additional characters. Texts sent to these Short Codes are commonly referred to as Premium Rate SMS Messages and cost around <a href="Indian_rupee" title="Indian rupee">Rs</a> 1 to Rs 3 per text depending on the operator as well as the service. Any length of full message can be sent, ranging from 100–500 (some providers only support).

</p>

<div class="mw-heading mw-heading3"><h3 id="Indonesia">Indonesia</h3></div>

<p>Codes are four digits in length with <a href="Indonesian_rupiah" title="Indonesian rupiah">Rp</a>2000 premium price.

</p>

<div class="mw-heading mw-heading3"><h3 id="Republic_of_Ireland">Republic of Ireland</h3></div>

<p>Short codes are five digits in length, and start with 5. The second digit generally indicates the maximum price, with 0 = completely free, 1 = standard text rate only, 3 = <a href="Euro" title="Euro">€</a>0.60, and 7 having no maximum. Codes beginning 59 are ostensibly intended for adult services, but few if any of these codes are used.<sup id="cite_ref-comreg_14-0" class="reference"><a href="#cite_note-comreg-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Italy">Italy</h3></div>

<p>In Italy, short codes have no fixed length, starting from three digits up to five. All short codes that start with the digit "4", are designated by a local telecommunications law for "network services". Widely known short codes are in the 48xxx range, commercial ringtones and mobile stuff download.

</p>

<div class="mw-heading mw-heading3"><h3 id="Korea,_South">Korea, South</h3></div>

<p>Codes are generally four to six digits in length, however short codes have no fixed length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Latvia">Latvia</h3></div>

<p>In Latvia short codes also have no fixed length, starting from three digits up to five. All 4 digit short codes that start with "118" or 5 digit short codes that start with "1184" are designated to information service providers.

</p>

<div class="mw-heading mw-heading3"><h3 id="Lithuania">Lithuania</h3></div>

<p>In Lithuania, short codes also have no fixed length, starting from three digits up to five. All short codes that start with the digit "1", are designated by a local telecommunications law for "network services".

</p>

<div class="mw-heading mw-heading3"><h3 id="Malaysia">Malaysia</h3></div>

<p>Codes are five digits in length, start with "2" or "3", premium pricing from <a href="Malaysian_ringgit" title="Malaysian ringgit">RM</a>0.30 up to 10.00. Codes are MT billed so subscription services are allowed. Upon service description approval by mobile operators, dedicated codes are generally live in 4 weeks, and shared codes after 1 week.

</p>

<div class="mw-heading mw-heading3"><h3 id="Morocco">Morocco</h3></div>

<p>Codes are four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Nepal">Nepal</h3></div>

<p>Codes are three to four digits in length. Dialing short codes are generally 3 digits, and reserved for public services. SMS shortcodes are used for a range of purposes, and are four digits.

</p>

<div class="mw-heading mw-heading3"><h3 id="The_Netherlands">The Netherlands</h3></div>

<p>Codes are four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="New_Zealand">New Zealand</h3></div>

<p>Codes are three to four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Nigeria">Nigeria</h3></div>

<p>Codes are four to five digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Norway">Norway</h3></div>

<p>Codes are four to five digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Pakistan">Pakistan</h3></div>

<p>Codes are three and four digits in length. Users are charged PKR 5 - PKR 25 per SMS sent on short codes. Mobile operators charge a setup fee, monthly fee and fee per keyword for short codes. Short codes usage must abide by the rules set by PTA (Pakistan Telecom Authority).

</p>

<div class="mw-heading mw-heading3"><h3 id="Panama">Panama</h3></div>

<p>Codes are four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Poland">Poland</h3></div>

<p>Commercial codes are five digit long (1xxxx) and are reachable from both mobile and fixed networks. Calls to short codes - from any type of network - are routed based on the location of the number originating the call; hence, if wishing to reach a particular geographical area, the subscriber might need to prefix the short code with an appropriate area code.

</p>

<div class="mw-heading mw-heading3"><h3 id="The_Philippines">The Philippines</h3></div>

<p>Codes are seven digits in length. The National Telecommunications Commission (NTC) is a regulatory agency providing an environment that ensures reliable, affordable and viable infrastructure and services in information and communications technology (ICT) accessible to all.<sup id="cite_ref-ntc-ph_15-0" class="reference"><a href="#cite_note-ntc-ph-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> Although the NTC is ultimately responsible for the governance of premium and non-premium shortcodes in the Philippines, the NTC's regulatory guidelines are not comprehensive when applied to shortcodes. Instead NTC's guidelines focus more on the carriers and the carrier's technical infrastructure. NTC's website does not contain any specific information with regard to premium SMS or standard rate SMS. There is relevant documentation for Bulk SMS and SPAM control via NTC's "AMENDMENT TO THE RULES AND REGULATIONS ON BROADCAST MESSAGING SERVICES", however again is not directly related to premium SMS.

</p>

<div class="mw-heading mw-heading3"><h3 id="Russia">Russia</h3></div>

<p>Codes are four digits in length. The cost of the call or SMS to the short number varies from 1.2 to 300 <a href="Russian_ruble" title="Russian ruble">rubles</a>, depending on the number and the carrier.

</p>

<div class="mw-heading mw-heading3"><h3 id="Serbia">Serbia</h3></div>

<p>Codes are four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Singapore">Singapore</h3></div>

<p>Codes are five digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="South_Africa">South Africa</h3></div>

<p>Codes are five digits in length. Short codes will start with either a "3" or "4". For example, 34001 or 42001. Each short code or short code range (a range will generally be 34000 to 34009) are assigned specific tariffs or end user prices (EUP). The tariff charges can range from <a href="South_African_rand" title="South African rand">R</a>0.50 to R30.00 on mobile originated billing and from R0.50 to R50.00 using mobile terminated billing.<sup id="cite_ref-waspa_16-0" class="reference"><a href="#cite_note-waspa-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-sms-za_17-0" class="reference"><a href="#cite_note-sms-za-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> Due to high costs associated with short code rental many providers offer shared shortcodes, which greatly reduces costs.<sup id="cite_ref-logic_18-0" class="reference"><a href="#cite_note-logic-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="Spain">Spain</h3></div>

<p>Codes are four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Sweden">Sweden</h3></div>

<p>Codes are five digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="Switzerland">Switzerland</h3></div>

<p>Codes are three to five digits in length (most popular codes are three digits long); codes starting with "6" are reserved for adult services.

</p>

<div class="mw-heading mw-heading3"><h3 id="Taiwan">Taiwan</h3></div>

<p>Codes are usually four digits in length, starting with digits "19".

</p>

<div class="mw-heading mw-heading3"><h3 id="Turkey">Turkey</h3></div>

<p>Codes are four digits in length.

</p>

<div class="mw-heading mw-heading3"><h3 id="United_Kingdom">United Kingdom</h3></div>

<p>Codes are usually five, six or seven digits in length, mostly starting with 6, 7 or 8.<sup id="cite_ref-sccbr_19-0" class="reference"><a href="#cite_note-sccbr-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> The range of codes may be expanded in time to use other leading digits such as 4. Shortcodes are often owned by holding companies<sup id="cite_ref-smss-shar-dedi_20-0" class="reference"><a href="#cite_note-smss-shar-dedi-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> who then lease them out to service providers and advertisers to promote SMS services, charitable fundraising and marketing promotions such as news alerts, voting and quizzes.

</p><p>Codes starting 70 are used by charities.<sup id="cite_ref-sc_21-0" class="reference"><a href="#cite_note-sc-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> Codes starting 72 are used by Society Lotteries.<sup id="cite_ref-sc_21-1" class="reference"><a href="#cite_note-sc-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> Adult related mobile services must use codes starting 69 or 89. Mobile operators sometimes use proprietary codes (either with a different leading digit, or shorter in length) for operator-specific functions. Depending on the service offered, users may interact with service providers either by calling the number, or by sending and/or receiving a text or MMS message.

</p><p>Calls to mobile shortcodes may be free, or may be charged per call or at a per minute rate. Where the number can be called from any mobile network, the same charge will apply from all networks.

</p><p>Messages sent to mobile shortcodes may be charged at a "standard rate", or with an additional premium charge. Where messages incur a "standard rate" charge, this is set by the sender's mobile provider and varies by provider.

</p><p>Messages received from shortcodes may be free or may incur a premium charge. Messages can be used to deliver additional content, or a URL link that opens the users web browser at a specific web page. For subscription services, the charges may recur on a daily, weekly, monthly or other basis. To stop a subscription based shortcode service text the word 'STOP' to the shortcode number.

</p><p>The service provider must state the applicable charges alongside the number. Calls and messages to mobile shortcodes do not count towards inclusive allowances or bundles.

</p><p>Where the benefit passed on to the service provider is more than 10p per call, per minute, or per message, Ofcom's <i>Premium Rate Services Condition</i><sup id="cite_ref-ofcom_prs_cond_2015_22-0" class="reference"><a href="#cite_note-ofcom_prs_cond_2015-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ofcom_prs_cond_2018_23-0" class="reference"><a href="#cite_note-ofcom_prs_cond_2018-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> defines it as being a <i>Controlled Premium Rate Service</i> (CPRS) and subject to the additional regulation detailed in <i>The Regulation of Premium Rate Services Order 2024</i>.<sup id="cite_ref-ofcom_prs_order_24-0" class="reference"><a href="#cite_note-ofcom_prs_order-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup>

</p><p>Until 31 January 2025, these services were regulated by the <a href="Phone-paid_Services_Authority" title="Phone-paid Services Authority">Phone-paid Services Authority</a>.<sup id="cite_ref-psa_ofcom_transfer_25-0" class="reference"><a href="#cite_note-psa_ofcom_transfer-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> From 1 February 2025, Ofcom regulates these services directly.<sup id="cite_ref-ofcom_fut_prs_reg_statement_26-0" class="reference"><a href="#cite_note-ofcom_fut_prs_reg_statement-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ofcom_psa_transfer_27-0" class="reference"><a href="#cite_note-ofcom_psa_transfer-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> A number of key PSA staff had already been embedded within Ofcom for some time in preparation for this move.<sup id="cite_ref-ofcom_psa_28-0" class="reference"><a href="#cite_note-ofcom_psa-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup>

</p>

<div class="mw-heading mw-heading3"><h3 id="United_States">United States</h3></div>

<p>Standard, interoperable short codes in the U.S. are five or six digits long,<sup id="cite_ref-uss-csc_29-0" class="reference"><a href="#cite_note-uss-csc-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> never start with 1, and only work in the U.S.<sup id="cite_ref-uss-faq_30-0" class="reference"><a href="#cite_note-uss-faq-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> They are leased by the short code program's registry service provider <a href="Iconectiv" title="Iconectiv">iconectiv</a>, under a deal with the Common Short Code Administration<sup id="cite_ref-justia_31-0" class="reference"><a href="#cite_note-justia-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> and <a href="Cellular_Telecommunications_%26_Internet_Association" class="mw-redirect" title="Cellular Telecommunications & Internet Association">CTIA</a>.<sup id="cite_ref-wirelessweek_32-0" class="reference"><a href="#cite_note-wirelessweek-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> It costs twice as much to choose a specific code as it does to get one that is randomly assigned.<sup id="cite_ref-wirelessweek_32-1" class="reference"><a href="#cite_note-wirelessweek-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> Some carriers assign a subset of their carrier-specific codes to third parties.<sup id="cite_ref-Short1_33-0" class="reference"><a href="#cite_note-Short1-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup>

</p>

<blockquote><p>"The <i>Short Code Registry</i><sup id="cite_ref-uss-reg_34-0" class="reference"><a href="#cite_note-uss-reg-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> maintains a single database of available, reserved and registered short codes. CTIA administers the Common Short Code program, and <i>iconectiv</i><sup id="cite_ref-iconective_35-0" class="reference"><a href="#cite_note-iconective-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> became the official U.S. Short Code Registry service provider in January, 2016. For more information, please see the <i>Short Code Registry’s Best Practices</i><sup id="cite_ref-uss_36-0" class="reference"><a href="#cite_note-uss-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> and the <i>Short Code Monitoring Handbook</i>."<sup id="cite_ref-ctia-handbook_37-0" class="reference"><a href="#cite_note-ctia-handbook-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ctia-prog_38-0" class="reference"><a href="#cite_note-ctia-prog-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-wmc_39-0" class="reference"><a href="#cite_note-wmc-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup></p></blockquote>

<p>Texting "HELP" to a short code causes the short code service to return a message with terms and conditions, support information — consisting of either a toll-free phone number or email address at a minimum — and other information from the leaseholder of the short code.<sup id="cite_ref-twilio-us-ind_40-0" class="reference"><a href="#cite_note-twilio-us-ind-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-resolver_41-0" class="reference"><a href="#cite_note-resolver-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> A user can opt-out from receiving any further messages from a short code service by texting "STOP", "END", "QUIT", "CANCEL", or "UNSUBSCRIBE" to the short code; after doing so, one final message confirming the opt-out is sent.<sup id="cite_ref-twilio-223182208_42-0" class="reference"><a href="#cite_note-twilio-223182208-42"><span class="cite-bracket">[</span>42<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ctia-handbook_37-1" class="reference"><a href="#cite_note-ctia-handbook-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup>

</p>

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<ul><li><a href="Abbreviated_dialing" title="Abbreviated dialing">Abbreviated dialing</a></li>

<li><a href="Vertical_service_code" title="Vertical service code">Vertical service code</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<ul><li><a rel="nofollow" class="external text" href="http://web.acma.gov.au/numb/openAccess/inquiry/viewAllocationSearch.do">Australian short code search</a> (<a href="Australian_Communications_and_Media_Authority" title="Australian Communications and Media Authority">Australian Communications and Media Authority</a>)</li>

<li><a rel="nofollow" class="external text" href="http://www.usshortcodes.com/">Common Short Code Administration</a> (U.S.)</li>

<li><a rel="nofollow" class="external text" href="http://www.short-codes.com/">Short Code Management Group</a> (U.K.)</li></ul></div><div><div class="zim-footer">

This article is issued from <a class="external text" title="Last edited on 2025-03-09" href="https://en.wikipedia.org/wiki/?title=Short_code&oldid=1279640881">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.

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