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.

OCN: 0051 SHELCOMM

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
951-619 A Arlington CA BLPKCAAFCM0  730      
954-631 A Hollywood FL MIAUFLWSX7X  46017   2024-10-25   
970-906 A Pagosa Springs CO PGSPCO290MD  656   2024-10-27   
971-536 A Portland OR   672   2026-07-04   
983-202 A Denver CO PGSPCO290MD  656   2024-03-15   
983-205 A Strasburg CO PGSPCO290MD  656   2024-10-27   
983-206 A Fort Lupton CO PGSPCO290MD  656   2024-10-27   

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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