Quality Metrics
Number Intelligence API
Ref: 3GPP TS 23.003 / ITU-T Recommendation E.214 / SS7 MAP
HLR Lookup
Home Location Register Real-Time SS7 & Mobile Number Portability (MNP) Query
Direct Telecom Definition • Carrier Industry Standard
A real-time network intelligence query executed directly against the mobile operator Home Location Register (HLR) via SS7/SIGTRAN signaling to verify subscriber status, ported network (MNP), roaming country, and IMSI identifier.
Technical Definition & Carrier Engineering Standards
HLR Lookup is an essential pre-routing verification tool in telecommunications. By interrogating the live Home Location Register database of destination mobile network operators (MNOs) before dispatching SMS or voice calls, aggregators can filter out disconnected, invalid, or roaming numbers, saving up to 35% in wasted termination fees and maintaining optimal sender reputation.