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An `F33f`_`[SS7`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Signalling_System_No._7]`_`f `!point code`! is an address for the SS7 telephone switching system. It is similar to an `F33f`_`[IP address`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=IP_address]`_`f in an IP network. It is a unique address for a node (Signaling Point, or SP), used in `F33f`_`[MTP layer 3`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=Message_Transfer_Part]`_`f to identify the destination of a message signal unit (MSU).

Message contain an OPC (Originating Point Code) and a DPC (Destination Point Code); sometimes documents refer to it as a signaling point code. Depending on the network, a point code can be 24 bits (North America, China), 16 bits (Japan), or 14 bits (ITU standard, International SS7 network and most countries) in length.

`F33f`_`[ANSI`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=ANSI]`_`f point codes use 24 bits, mostly in 8-8-8 format.`:cite-ref-1[`F5bf`_`[1`#cite-note-1]`_`f] `F33f`_`[ITU`:/page/wikibook/entry.mu`zim=wikipedia_en_all_nopic_2025-08.zim|entry_path=ITU]`_`f point codes use 14 bits in 3-8-3 format.`:cite-ref-0-2-0[`F5bf`_`[2`#cite-note-0-2]`_`f]

Fourteen bit point codes can be written in multiple formats. The most common are decimal number, hexadecimal number, or 3-8-3 format (3 most significant bits, 8 middle bits, 3 least significant bits).

Twenty-four bit point codes may be written in decimal, hexadecimal, or 8-8-8 format.

>>Contents

• `F0af`_`[Abbreviations`#abbreviations]`_`f

• `F0af`_`[References`#references]`_`f

• `F0af`_`[External links`#external-links]`_`f

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>>Abbreviations

• OPC Originating Point Code

• DPC Destination Point Code

• ISPC International Signaling Point Code`:cite-ref-0-2-1[`F5bf`_`[2`#cite-note-0-2]`_`f]

>>References

`:cite-note-1`!1.`! `F0af`_`[↑`#cite-ref-1]`_`f ANSI T1.111.4/2000, Message Transfer Part.

`:cite-note-0-2`!2.`! `F0af`_`[↑`#cite-ref-0-2-0]`_`f ITU-T Recommendation Q.704, Message Transfer Part.

>>External links

• Web-based PointCode converter

• SS7 Point Code Converter by Valid8.com

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