HLR (Home Location Register)
The Home Location Register (HLR) is the main database of permanent subscriber information for a mobile network. The HLR is an integral component of CDMA (code division multiple access), TDMA (time division multiple access), and GSM (Global System for Mobile communications) networks. In order for communication to take place with the mobile device of a subscriber, the location of the device must be known in order to route those communications to the part of the mobile network serving their mobile device.
See Melrose Labs SS7 SMSC, Melrose Labs SMPP SMS Gateway
Melrose Labs: Our mission is to deliver pivotal services in cloud communications across mobile, fixed-line and internet for enterprises of all sizes. Through these services, we help businesses and other organisations communicate better with their staff and customers, and by doing so increase their success.