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: 323

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
307-323 A Pinedale WY   566J RADIANTIQ LLC 654      
307-323 0 Pinedale WY   566J RADIANTIQ LLC 654   2021-07-11   
307-323 1 Pinedale WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2020-12-19   
307-323 2 Pinedale WY CHYNWYMAXFX  450F ONVOY, LLC - WY 654   2019-09-21   
307-323 3 Pinedale WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2020-09-05   
307-323 4 Pinedale WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2020-09-05   
307-323 5 Pinedale WY CHYNWYMAEMD  9416 LEVEL 3 COMMUNICATIONS, LLC - WY 654   2020-09-22   
307-323 6 Pinedale WY CHYNWYMAX9X  879G TELEPORT COMMUNICATIONS AMERICA WY-LLC 654   2020-11-09   
307-323 7 Pinedale WY CHYNWYMAX2X  450F ONVOY, LLC - WY 654   2020-12-19   
307-323 8 Pinedale WY CHYNWYMAX6X  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2020-09-21   
307-323 9 Pinedale WY CHYNWYMAX6X  6010 NEW CINGULAR WIRELESS PCS, LLC 654   2020-09-21   

Last updated: Fri, 10 Sep 2021 12:38:21 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.