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: 440 [Rate centres in NPA 440] [Dial plan for NPA 440]

NXX: 510

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
440-510 A Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      
440-510 0 Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      
440-510 1 Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      
440-510 2 Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      
440-510 3 Willoughby OH CLEVOH975MD  4863 LEVEL 3 COMMUNICATIONS, LLC - OH 320   2010-09-26   
440-510 4 Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      
440-510 5 Willoughby OH   464C ONVOY, LLC - OH 320   2021-03-01   
440-510 6 Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      
440-510 7 Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      
440-510 8 Willoughby OH CLEVOH64X7X  547D TIME WARNER CABLE INFORMATION SVCS (OHIO) - OH 320   2009-03-16   
440-510 9 Willoughby OH CLEXOHUQDS0  3586 ALLEGIANCE TELECOM, INC. - OH 320      

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.