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: 253

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-253 A Frederick MD   876D ONVOY, LLC - MD 240   2024-11-17   
227-253 0 Frederick MD   876D ONVOY, LLC - MD 240      
227-253 1 Frederick MD   732J NUSO, LLC 240      
227-253 2 Frederick MD   732J NUSO, LLC 240      
227-253 3 Frederick MD   732J NUSO, LLC 240      
227-253 4 Frederick MD   876D ONVOY, LLC - MD 240      
227-253 5 Frederick MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240      
227-253 8 Frederick MD   073H TELNYX LLC 240      
227-253 9 Frederick MD   073H TELNYX LLC 240      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.