Protocol

LNP

Local Number Portability · Number Portability · LRN dip

Lab ready Full lab

Local Number Portability lets a subscriber keep an E.164 number when changing carriers. Originating switches query an NPDB (often via TCAP/AIN or ENUM) and route on the returned Location Routing Number (LRN) instead of the dialed NPA-NXX. NPAC/SOA provisioning keeps the regional databases in sync.

Domains

Tags

ss7portabilitylrnnpdbnpactcap

Sources

  • FCC LNP / NPAC overview
  • ANSI T1.113 / AIN LNP triggers
  • IETF ENUM (RFC 6116) for IP NP dips

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