HLR Lookup Services
Know the network status of your send numbers
HLR Lookups, HLR checking, or HLR query is a technology to check the status of any GSM cell phone number. By making a query to the Home Location Register, the lookup service determines whether that number is valid, whether it is currently active in a mobile network, and if so which network, whether it was ported from another network, and whether it is roaming. All checks are remotely performed, and the mobile user does not see anything on their phone. The query will also return meta information such as the IMSI, MSC, MCC and MNC.