LRN database is kind of like the DNS of telephony. Since local numbers can be on any switch, LRN tells everyone which switch manages the number. See: Location

LRN database is kind of like the DNS of telephony. Since local numbers can be on any switch, LRN tells everyone which switch manages the number. See: Location Routing Number https://en.m.wikipedia.org/wiki/Location_Routing_Number https://en.m.wikipedia.org/wiki/Location_Routing_Number