Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 207 [Rate centres in NPA 207] [Dial plan for NPA 207]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
207-257 A Plymouth ME PLMOMEXARS1  3315 MID-MAINE TELECOM LLC 120      
207-257 2 Plymouth ME PLMOMEXARS1  3315 MID-MAINE TELECOM LLC 120      
207-257 3 Plymouth ME PLMOMEXARS1  3315 MID-MAINE TELECOM LLC 120      
207-257 6 Plymouth ME   145J TERRA NOVA TELECOM INC. 120   2025-07-07   
207-257 7 Plymouth ME PTLDMEODDS0  1255 CRC COMMUNICATIONS OF MAINE, INC. - ME 120   2009-04-22   
207-257 8 Plymouth ME   793K TWC IP ENABLED SERVICES, LLC 120   2012-10-18   

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.