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.

Philadelphia Suburban Zone 31, PA

<< 1 2 3 4 5 6 7 8

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
610-940 7 CNSHPACNRP0  9208 VERIZON PENNSYLVANIA, INC. 228      
610-940 8 PHLAPAMKX4X  624H ONVOY SPECTRUM, LLC 228   2022-01-08   
610-940 9 CNSHPACNRP0  9208 VERIZON PENNSYLVANIA, INC. 228      
610-941 A CNSHPACNRP0  9208 VERIZON PENNSYLVANIA, INC. 228      
610-943 A PHLAPAFGD0S  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 228      
610-943 0 PHLAPAMK33Z  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2024-06-29   
610-943 1 PHLAPAFGBMD  197D VONAGE AMERICA LLC 228   2022-07-08   
610-943 2 PHLAPAFGD0S  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 228   2003-05-02   
610-943 3 PHLAPAFGD0S  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 228   2003-05-02   
610-943 4 PHLAPAFGD0S  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 228      
610-943 5 PHLAPAFGD0S  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 228      
610-943 6 PHLAPAFGD0S  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 228      
610-943 7 PHLAPAMKX4X  624H ONVOY SPECTRUM, LLC 228   2021-11-05   
610-943 8 PHLAPAMKX4X  624H ONVOY SPECTRUM, LLC 228   2021-11-05   
610-943 9 PHLAPAMKX4X  624H ONVOY SPECTRUM, LLC 228   2021-11-05   

<< 1 2 3 4 5 6 7 8

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.