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: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 308

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-308 A Roxbury MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-308 0 Roxbury MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-308 1 Roxbury MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-308 2 Roxbury MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-308 3 Roxbury MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
857-308 4 Roxbury MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-308 5 Roxbury MA CMBRMABEQMD  321J HD CARRIER LLC 128      
857-308 6 Roxbury MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-308 7 Roxbury MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-308 8 Roxbury MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-308 9 Roxbury MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.