A method for providing emergency location information to an emergency
service provider is provided. The method, in one implementation, includes
the steps of (a) providing a plurality of sets (e.g., ranges) of OSI
Layer 3 or Network Layer addresses; (b) receiving an emergency call from
a calling device having an OSI Layer 3 or Network Layer address; (c)
mapping the calling address against the plurality of sets of addresses to
determine an ELIN for the calling address; and (d) forwarding the ELIN to
a public safety answer point. Each set of addresses comprises a plurality
of addresses, and a plurality of ELINs corresponds to the plurality of
sets of addresses. In each set of addresses, a corresponding one of the
plurality of ELINs is typically common to a plurality of addresses.