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: 945 [Rate centres in NPA 945] [Dial plan for NPA 945]

NXX: 291

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
945-291 A Frisco TX DLLTTXID1MD  6529 T-MOBILE USA, INC. 552      
945-291 0 Frisco TX DLLTTXID1MD  6529 T-MOBILE USA, INC. 552   2024-05-29   
945-291 1 Frisco TX DLLTTXID1MD  6529 T-MOBILE USA, INC. 552   2024-05-29   
945-291 2 Frisco TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2024-08-13   
945-291 3 Frisco TX   624H ONVOY SPECTRUM, LLC 552   2025-05-26   
945-291 4 Frisco TX   624H ONVOY SPECTRUM, LLC 552   2025-05-26   
945-291 5 Frisco TX   624H ONVOY SPECTRUM, LLC 552   2025-05-26   
945-291 6 Frisco TX   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552   2025-06-02   
945-291 8 Frisco TX DLLTTXID1MD  6529 T-MOBILE USA, INC. 552   2024-10-11   
945-291 9 Frisco TX DLLTTXID1MD  6529 T-MOBILE USA, INC. 552   2024-10-11   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.