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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NPA: 620 [Rate centres in NPA 620] [Dial plan for NPA 620]

NXX: 681

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
620-681 A Longton KS WCHVKSCK9MD  6529 T-MOBILE USA, INC. 532   2025-06-01   
620-681 0 Longton KS WCHVKSCK9MD  5562 METROPCS, INC. 532   2025-06-02   
620-681 9 Longton KS WCHVKSCK9MD  6529 T-MOBILE USA, INC. 532   2025-06-01   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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