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.

Switch: SHMNTXXARMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
430-270 4 Whitesboro TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-277 3 Denison TX 624H ONVOY SPECTRUM, LLC 552   2024-08-14   
430-279 4 Gordonville TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-330 4 Collinsville TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-337 5 Ector TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-499 3 Trenton TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-500 A Pottsboro TX 624H ONVOY SPECTRUM, LLC 552      
430-500 9 Pottsboro TX 624H ONVOY SPECTRUM, LLC 552   2021-12-12   
430-599 3 Dorchester TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-910 2 Van Alstyne TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-946 5 Howe TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
903-207 0 Gunter TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
903-214 5 Sherman TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
903-551 0 Gunter TX 624H ONVOY SPECTRUM, LLC 552   2024-01-14   
903-551 2 Gunter TX 624H ONVOY SPECTRUM, LLC 552   2024-01-14   
903-864 6 Bonham TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   
903-996 4 Leonard TX 624H ONVOY SPECTRUM, LLC 552   2024-01-04   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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