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: 425 [Rate centres in NPA 425] [Dial plan for NPA 425]

NXX: 837

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
425-837 A Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 0 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 1 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 2 Issaquah WA STTLWA060MD  6529 T-MOBILE USA, INC. 674   2017-02-11   
425-837 3 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 4 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 5 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 6 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 7 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 8 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      
425-837 9 Issaquah WA ISQHWAEXDS0  9638 QWEST CORPORATION 674      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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