HLR lookup
Querying mobile operators' register to check whether a number is active, without placing a call.
The HLR (Home Location Register) is the mobile operators' database. An HLR lookup checks that a number is assigned and reachable, and reveals the carrier and sometimes porting. It is, for phone, the equivalent of SMTP verification for email.
It lets you clean a list of numbers before a call or SMS campaign by removing inactive ones. It says nothing about the owner, only the line's status.
Related terms
To go further, read our B2B data enrichment guide or try the free email verifier.
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