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<title>Area code 773</title>
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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Area code 773</span></span>
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<p><b>Area code 773</b> serves <a href="Chicago%2C_Illinois" class="mw-redirect" title="Chicago, Illinois">Chicago, Illinois</a>, outside <a href="Chicago_Loop" title="Chicago Loop">the Loop</a> and the innermost neighborhoods.
</p><p>Originally, all of Chicago and its suburbs used <a href="Area_code_312" title="Area code 312">area code 312</a>. In 1989, <a href="Area_code_708" class="mw-redirect" title="Area code 708">area code 708</a> was created for the suburbs, leaving the city in area code 312.
</p><p>By the mid-1990s, Chicago's continued growth and the proliferation of cell phones and pagers made it apparent that the city needed a new area code. It was decided to split off all of the city outside the downtown area as 773. The new area code went into effect on October 12, 1996. Permissive dialing of 312 continued across Chicago until January 11, 1997.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> On August 10, 2007, the Illinois Commerce Commission announced that <a href="Area_code_872" title="Area code 872">area code 872</a> would overlay area codes 312 and 773; it went into service on November 7, 2009.
</p><p>The Illinois side of the Chicago area–312/773/872, 708, <a href="Area_codes_847_and_224" title="Area codes 847 and 224">847/224</a>, <a href="Area_codes_630_and_331" title="Area codes 630 and 331">630/331</a> and portions of <a href="Area_codes_815_and_779" title="Area codes 815 and 779">815/779</a>–is one of the largest local calling areas in the United States; with few exceptions, no long-distance charges are applied from one portion of the metro area to another.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>
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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">
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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20071028144526/http://www.att.com/gen/general?pid=1717">"AT&T Area Code History: Illinois"</a>. <a href="AT%26T" title="AT&T">AT&T</a>. 2009. Archived from <a rel="nofollow" class="external text" href="http://www.att.com/gen/general?pid=1717">the original</a> on October 28, 2007<span class="reference-accessdate">. Retrieved <span class="nowrap">August 19,</span> 2009</span>.</cite></span>
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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.chicagotribune.com/1997/01/11/grace-period-ends-for-773-area-code/">"Grace Period Ends for 773 Area Code"</a>. <i>Chicago Tribune</i>. January 11, 1997<span class="reference-accessdate">. Retrieved <span class="nowrap">October 24,</span> 2020</span>.</cite></span>
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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://localcallingguide.com/lca_exch.php?exch=047801">Local calling guide: Chicago Zone 01: Calumet, IL</a></span>
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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="https://www.nanpa.com/area_code_maps/display.html?il">Map of Illinois area codes</a> by the <a href="North_American_Numbering_Plan_Administration" class="mw-redirect" title="North American Numbering Plan Administration">North American Numbering Plan Administration</a></li>
<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20090405170017/http://www.areacodedownload.com/773/index.html">List of exchanges in the 773 Area Code</a> from AreaCodeDownload.com</li></ul>
<table class="wikitable" style="font-size: 95%;" width="80%" align="center">
<caption><a href="Illinois" title="Illinois">Illinois</a> area codes: <a href="Area_codes_217_and_447" title="Area codes 217 and 447">217/447</a>, <a href="Area_codes_309_and_861" title="Area codes 309 and 861">309/861</a>, <a href="Area_code_312" title="Area code 312">312</a>, <a href="Area_codes_630_and_331" title="Area codes 630 and 331">630/331</a>, <a href="Area_codes_618_and_730" title="Area codes 618 and 730">618/730</a>, <a href="Area_codes_708_and_464" title="Area codes 708 and 464">708/464</a>, , <a href="Area_codes_815_and_779" title="Area codes 815 and 779">815/779</a>, <a href="Area_codes_847_and_224" title="Area codes 847 and 224">847/224</a>, <a href="Area_code_872" title="Area code 872">872</a>
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<td width="30%" style="text-align:center;"><b>North</b>: <a href="Area_codes_847_and_224" title="Area codes 847 and 224">847/224</a>
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<td width="10%" style="text-align:center;"><b>West</b>: 708
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<td width="35%" style="text-align:center;"><b>773 </b>
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<td width="30%" style="text-align:center;"><b>East</b>: <a href="Area_code_312" title="Area code 312">312</a>, <a href="Area_code_219" title="Area code 219">219</a>, <a href="Lake_Michigan" title="Lake Michigan">Lake Michigan</a>
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<td width="30%" style="text-align:center;"><b>South</b>: <a href="Area_codes_708_and_464" title="Area codes 708 and 464">708/464</a>
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<td colspan="3" style="text-align:center;"><a href="Indiana" title="Indiana">Indiana</a> area codes: <a href="Area_code_219" title="Area code 219">219</a>, <a href="Area_code_260" title="Area code 260">260</a>, <a href="Area_codes_317_and_463" title="Area codes 317 and 463">317/463</a>, <a href="Area_code_574" title="Area code 574">574</a>, <a href="Area_code_765" title="Area code 765">765</a>, <a href="Area_codes_812_and_930" title="Area codes 812 and 930">812/930</a>
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</style><span class=" nourlexpansion"><a class="external text" href="geo:41.88,-87.6316667"><span class="geo-default"><span class="geo-dms" title="Maps, aerial photos, and other data for this location"><span class="latitude">41°52′48″N</span> <span class="longitude">87°37′54″W</span></span></span><span class="geo-multi-punct"> / </span><span class="geo-nondefault"><span class="geo-dec" title="Maps, aerial photos, and other data for this location">41.88°N 87.6316667°W</span><span style="display:none"> / <span class="geo">41.88; -87.6316667</span></span></span></a></span></span>
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