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.

Mount Calm, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
254-637 A MTCLTXXAPS0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-637 0 WACOTX01XIX  903C ONVOY, LLC - TX 556   2019-07-10   
254-637 1 WACOTX01XCY  624H ONVOY SPECTRUM, LLC 556   2021-12-04   
254-637 2 WACOTX01XIX  903C ONVOY, LLC - TX 556   2019-10-31   
254-637 3 WACOTX01XIX  903C ONVOY, LLC - TX 556   2019-10-31   
254-637 4 WACOTXEY6MD  516J TON80 COMMUNICATIONS, LLC 556   2021-06-10   
254-637 5 WACOTX01XCY  624H ONVOY SPECTRUM, LLC 556   2021-07-08   
254-637 7 WACOTX01XIX  903C ONVOY, LLC - TX 556   2021-03-15   
254-637 8 WACOTX01XDX  004F BANDWIDTH.COM CLEC, LLC - TX 556   2020-03-05   
254-637 9 MTCLTXXAPS0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556   2015-09-07   
254-993 A MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 0 KLLNTXXARMD  508J CENTURYLINK COMMUNICATIONS, LLC 556   2015-01-19   
254-993 1 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 2 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 3 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 4 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 5 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 6 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 7 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 8 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-993 9 MTCLTXXARP0  1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 556      
254-994 A WACOTXEY0MD  0132 AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 556      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.