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: 307 [Rate centres in NPA 307] [Dial plan for NPA 307]

NXX: 212

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-212 A Rock Springs WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-212 0 Rock Springs WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-212 1 Rock Springs WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-212 2 Rock Springs WY CHYNWYMAXIX  6566 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 654      
307-212 3 Rock Springs WY CHYNWYMAZMD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 654      
307-212 4 Rock Springs WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-212 5 Rock Springs WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654      
307-212 6 Rock Springs WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654      
307-212 7 Rock Springs WY RCSPWYMADS1  9636 QWEST CORPORATION 654      
307-212 8 Rock Springs WY CHYNWYMAQMD  081F BANDWIDTH.COM CLEC, LLC - WY 654      
307-212 9 Rock Springs WY CHYNWYMAX4X  370E YMAX COMMUNICATIONS CORP. - WY 654      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.