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.

Switch: DOVRNHTHDS0

Remotes:

Switch Switch name Switch type
BNTONHPRRS1  BARRINGTON  5ER 
CANDNHDERS1  CANDIA  5ER 
DOVRNHTH748  DOVER  5ER 
DRHMNHMCRS1  DURHAM  5ER 
NWODNHYARS1  NORTHWOOD  5ER 
SMRSNHHIRS1  SOMERSWORTH  5ER 
SMRSNHHIRS2  SOMERSWORTH  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
603-248 A Dover NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-740 A Dover NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-742 A Dover NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-743 A Dover NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-749 A Dover NH 5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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