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.

Switch: SNANTX91X7Y

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
956-999 4 Laredo TX 5562 METROPCS, INC. 566   2013-07-06   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.