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: 227 [Rate centres in NPA 227] [Dial plan for NPA 227]

NXX: 241

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-241 A Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-07-07   
227-241 7 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-07-07   
227-241 8 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-07-07   
227-241 9 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-07-07   

Last updated: Sat, 01 Jun 2024 11:59:14 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.