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: TXCYTXTCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
409-641 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-643 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-645 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-683 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-797 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-916 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-941 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-942 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-943 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-944 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-945 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-948 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-949 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      
409-965 A Texas City-La Marque TX 9533 SOUTHWESTERN BELL 560      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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