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.

Sumner, ME

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
207-388 A TRNRMEXADS0  0019 OXFORD COUNTY TEL. & TEL. CO. 120      
207-388 2 SMNRMEXADS0  0019 OXFORD COUNTY TEL. & TEL. CO. 120      
207-388 3 SMNRMEXADS0  0019 OXFORD COUNTY TEL. & TEL. CO. 120      
207-388 6 TRNRMEXADS0  0019 OXFORD COUNTY TEL. & TEL. CO. 120      
207-388 8   145J TERRA NOVA TELECOM INC. 120   2025-06-06   
207-388 9 SMNRMEXADS0  0019 OXFORD COUNTY TEL. & TEL. CO. 120      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.