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: 207 [Rate centres in NPA 207] [Dial plan for NPA 207]

NXX: 537

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
207-537 A Otis ME OTISMEXARS1  0027 UNION RIVER TEL. CO. 120      
207-537 2 Otis ME OTISMEXARS1  0027 UNION RIVER TEL. CO. 120      
207-537 3 Otis ME OTISMEXARS1  0027 UNION RIVER TEL. CO. 120      
207-537 5 Otis ME OTISMEXARS1  0027 UNION RIVER TEL. CO. 120      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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