Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!purdue!haven!decuac!netsys!vector!telecom-gateway From: johnl@esegue.segue.boston.ma.us (John R. Levine) Newsgroups: comp.dcom.telecom Subject: Re: Numerical List of NPA's and NXX Count Message-ID: Date: 12 Oct 89 18:23:16 GMT Reply-To: johnl@esegue.segue.boston.ma.us Organization: Segue Software, Cambridge MA Lines: 15 Approved: telecom-request@vector.dallas.tx.us In article Dave Esan writes: >215 is actually the 16th fullest npa in North America [with 555 prefixes]... >Yes, 302 (Delaware) has the fewest (97). That makes sense. 215 and 302 are both geographically quite compact and relatively urbanized. That means there are relatively few places that need prefixes of their own, so the telco can fill up a prefix before issuing a new one. Compare that to 907, Alaska, with 337 prefixes and 403, Alberta, the Yukon, and part of the NWT, with 575. Neither contains very many people, but they're all spread out and so you have lots of prefixes serving only a few hundred people each.