SIP & Network
The routing number that identifies the switch actually serving a telephone number after number portability, used to route ported calls correctly.
When a subscriber ports their number, the dialed number no longer indicates the serving carrier. An LRN dip against the portability database returns the number that identifies the correct terminating switch.
LRN data also reveals the true carrier and rate centre behind a number, which is useful context in fraud and access-stimulation analysis.
Routing on the dialed number instead of the LRN produces misrouted calls and mis-rated traffic, both of which distort fraud baselines.
The ITU standard number format that gives every phone number a globally unique representation: a plus sign, country code, and subscriber number.
The four-character identifier assigned to a telecommunications carrier, used across number administration, routing, and STIR/SHAKEN eligibility.
The software-based call control platform that routes calls, applies rating and policy, and connects customers to upstream carriers.
Artificially inflating call volumes to a rural or high-cost destination so the terminating provider can collect inflated access charges.
SipShield scores live SIP traffic with patented AI so the controls behind this term run automatically — and leave the audit trail regulators expect.