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: 971 [Rate centres in NPA 971] [Dial plan for NPA 971]

NXX: 407

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
971-407 A Portland OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
971-407 0 Portland OR   6529 T-MOBILE USA, INC. 672   2014-06-28   
971-407 1 Portland OR   3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672   2014-06-16   
971-407 2 Portland OR   829J PAETEC ITEL, LLC 672   2014-03-15   
971-407 3 Portland OR   318J COMCAST IP PHONE, LLC 672   2014-05-23   
971-407 4 Portland OR   3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672   2014-05-03   
971-407 5 Portland OR   3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672   2014-05-03   
971-407 6 Portland OR   6529 T-MOBILE USA, INC. 672   2014-03-29   
971-407 7 Portland OR   6529 T-MOBILE USA, INC. 672   2014-03-29   
971-407 8 Portland OR   6529 T-MOBILE USA, INC. 672   2014-03-29   
971-407 9 Portland OR   6529 T-MOBILE USA, INC. 672   2014-03-13   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.