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: 917

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-917 A Millbury MA BRTNMACOX8X  829J PAETEC ITEL, LLC 128      
508-917 0 Millbury MA BRTNMACOX8X  829J PAETEC ITEL, LLC 128      
508-917 1 Millbury MA BRTNMACOX8X  829J PAETEC ITEL, LLC 128      
508-917 2 Millbury MA BRTNMACOX8X  829J PAETEC ITEL, LLC 128      
508-917 3 Millbury MA BRTNMACOX8X  829J PAETEC ITEL, LLC 128      
508-917 4 Millbury MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-03-24   
508-917 5 Millbury MA CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-12-01   
508-917 6 Millbury MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2008-04-28   
508-917 7 Millbury MA BRTNMACOXAX  829J PAETEC ITEL, LLC 128   2009-04-22   
508-917 8 Millbury MA OXFRMAAK1MD  792K CHARTER IP ENABLED SERVICES, LLC 128   2004-06-25   
508-917 9 Millbury MA BRTNMACOX8X  829J PAETEC ITEL, LLC 128      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.