The services rely on the ITU-T standard Signalling System 7 (SS7) connectivity between network switches (SSPs) and databases (800 Database, LNPDB, LIDB, etc.) to operate. The CLASS standards were defined by Bellcore (now Telcordia Technologies) in the 1970s.
Itu
Web Site
Itu T - Service in America - Find Mobiles and Phone Companies
Itu T - Service in America - Find Mobiles and Phone Companies
Itu America
Itu 2024 ITU limits Russian influence in global telecom research groups The New Voice of Ukraine
ITU taps into operator expertise to envision optical standards for IMT-2030 Light Reading
ITU makes commitments around AI, metaverse Mobile World Live
Ukraine blocks Russian candidates from leading ITU research groups Espreso. Global