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.
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Switch: OKCYOKSX4MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
580-970 4 Altus OK 6529 T-MOBILE USA, INC. 536   2019-04-15   
580-970 5 Altus OK 6529 T-MOBILE USA, INC. 536   2019-04-15   
580-970 6 Altus OK 6529 T-MOBILE USA, INC. 536   2019-04-15   
580-970 7 Altus OK 6529 T-MOBILE USA, INC. 536   2019-04-15   
580-970 8 Altus OK 6529 T-MOBILE USA, INC. 536   2017-10-09   
580-970 9 Altus OK 6529 T-MOBILE USA, INC. 536   2017-10-09   

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Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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