Administrative ESN (Emergency Service Number)

From NENA Knowledge Base

An Administrative ESN (Emergency Services Number) is a 3-5 digit number that represents an ESZ (Emergency Service Zone). It is stored in the MSAG (Master Street Address Guide) and is returned from an ALI (Automatic Location Identification) query. The Administrative ESN facilitates dispatching of the proper emergency service agency(ies).  An Administrative ESN is assigned to each MSAG range to associate the physical addresses to an ESZ. It is used to display English Language Translations (ELT) and may be used by CPE (Customer Premises Equipment) to transfer calls to the correct responder. An Administrative ESN may not be the same as a routing ESN (Refer to Routing ESN)