SS7 Point Code Calculator

Signaling System No. 7 (SS7) is a set of telephony signaling protocols developed in 1975, which is used to set up and tear down most of the world's public switched telephone network (PSTN) telephone calls. It also performs number translation, local number portability, prepaid billing, short message service (SMS), and other mass market services.

Point codes are numerical addresses used in SS7 networks to identify specific nodes. Different regions use different point code formats:

• ITU (International): 3-8-3 bit format
• ANSI (North America): 8-8-8 bit format
• Japan: 5-4-7 bit format
• China: 8-8-8 bit format (similar to ANSI but with different network/cluster/member meanings)

This calculator helps convert between these different formats, which is crucial for network engineers and telecom professionals working with international SS7 networks.

• ITU-T Recommendation Q.708 (03/99)
• RFC 3332 - SS7 MTP3-User Adaptation Layer (M3UA)
• 3GPP TS 29.002 - Mobile Application Part (MAP) specification