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: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-203 A Foxboro MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
508-203 0 Foxboro MA NRTNMAAACM4  5562 METROPCS, INC. 128      
508-203 1 Foxboro MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
508-203 2 Foxboro MA CHTWMABMAMD  2899 BROADVIEW NETWORKS, INC. - MA 128      
508-203 3 Foxboro MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
508-203 4 Foxboro MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
508-203 5 Foxboro MA BSTPMALLRMD  8345 GLOBAL CROSSING LOCAL SERVICES, INC. - MA 128      
508-203 6 Foxboro MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
508-203 7 Foxboro MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
508-203 8 Foxboro MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128      
508-203 9 Foxboro MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.