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: DLLTTX01HMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
940-843 8 Denton TX 6529 T-MOBILE USA, INC. 552   2022-03-18   
940-843 9 Denton TX 6529 T-MOBILE USA, INC. 552   2022-03-18   
940-977 0 Denton TX 6529 T-MOBILE USA, INC. 552   2021-09-30   
940-977 1 Denton TX 6529 T-MOBILE USA, INC. 552   2021-08-31   
940-977 2 Denton TX 6529 T-MOBILE USA, INC. 552   2022-03-18   
940-977 3 Denton TX 6529 T-MOBILE USA, INC. 552   2022-03-18   
940-977 4 Denton TX 6529 T-MOBILE USA, INC. 552   2022-03-18   
940-977 5 Denton TX 6529 T-MOBILE USA, INC. 552   2022-03-18   
940-977 9 Denton TX 6529 T-MOBILE USA, INC. 552   2021-08-31   
940-999 8 Denton TX 6529 T-MOBILE USA, INC. 552   2016-04-03   

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Last updated: Fri, 22 Mar 2024 03:02:44 UTC

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