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: 206

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-206 A Natick MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128      
508-206 0 Natick MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2018-12-07   
508-206 1 Natick MA   515J IP HORIZON LLC 128   2019-04-26   
508-206 2 Natick MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128   2018-04-02   
508-206 3 Natick MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128   2018-04-01   
508-206 4 Natick MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128   2018-04-01   
508-206 6 Natick MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-02-24   
508-206 7 Natick MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-02-24   
508-206 8 Natick MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2019-07-01   
508-206 9 Natick MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2019-07-01   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.