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: HSTNTXMOX7X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-501 A Houston TX 318J COMCAST IP PHONE, LLC 560      
281-612 A Friendswood TX 318J COMCAST IP PHONE, LLC 560      
281-624 A Bammel TX 318J COMCAST IP PHONE, LLC 560      
281-724 A League City TX 318J COMCAST IP PHONE, LLC 560      
281-729 A Dickinson TX 318J COMCAST IP PHONE, LLC 560      
281-741 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
281-789 A Pinehurst TX 318J COMCAST IP PHONE, LLC 560      
281-918 A Beach City TX 318J COMCAST IP PHONE, LLC 560      
281-942 A Seabrook TX 318J COMCAST IP PHONE, LLC 560      
346-219 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
346-223 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-224 A Spring TX 318J COMCAST IP PHONE, LLC 560      
346-226 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-227 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-240 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-270 A Bammel TX 318J COMCAST IP PHONE, LLC 560      
346-304 A Stafford TX 318J COMCAST IP PHONE, LLC 560      
346-309 A Sugar Land TX 318J COMCAST IP PHONE, LLC 560      
346-319 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-331 A Spring TX 318J COMCAST IP PHONE, LLC 560      
346-335 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-341 A Stafford TX 318J COMCAST IP PHONE, LLC 560      
346-342 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
346-385 A Friendswood TX 318J COMCAST IP PHONE, LLC 560      
346-389 A Beach City TX 318J COMCAST IP PHONE, LLC 560      
346-409 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
346-423 A Porter TX 318J COMCAST IP PHONE, LLC 560      
346-439 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
346-440 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
346-441 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-442 A Spring TX 318J COMCAST IP PHONE, LLC 560      
346-443 A Spring TX 318J COMCAST IP PHONE, LLC 560      
346-571 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-590 A Westfield TX 318J COMCAST IP PHONE, LLC 560      
346-591 A Porter Heights TX 318J COMCAST IP PHONE, LLC 560      
346-594 A Barker TX 318J COMCAST IP PHONE, LLC 560      
346-618 A Houston TX 318J COMCAST IP PHONE, LLC 560      
346-635 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
346-650 A Valley Lodge TX 318J COMCAST IP PHONE, LLC 560      
346-703 A Pinehurst TX 318J COMCAST IP PHONE, LLC 560      
409-995 A Texas City-La Marque TX 318J COMCAST IP PHONE, LLC 560      
713-714 A Houston TX 318J COMCAST IP PHONE, LLC 560      
832-230 A Houston Suburban TX 318J COMCAST IP PHONE, LLC 560      
832-427 A Langham Creek TX 318J COMCAST IP PHONE, LLC 560      
832-437 A Katy TX 318J COMCAST IP PHONE, LLC 560      
832-440 A Stafford TX 318J COMCAST IP PHONE, LLC 560      
832-569 A Friendswood TX 318J COMCAST IP PHONE, LLC 560      
832-604 A Satsuma TX 318J COMCAST IP PHONE, LLC 560      
832-659 A Houston TX 318J COMCAST IP PHONE, LLC 560      
832-694 A Channelview TX 318J COMCAST IP PHONE, LLC 560      
832-756 A Satsuma TX 318J COMCAST IP PHONE, LLC 560      
832-831 A Houston TX 318J COMCAST IP PHONE, LLC 560      
832-855 A Bammel TX 318J COMCAST IP PHONE, LLC 560      
832-879 A Houston TX 318J COMCAST IP PHONE, LLC 560      
832-902 A Beach City TX 318J COMCAST IP PHONE, LLC 560      
832-953 A Tomball TX 318J COMCAST IP PHONE, LLC 560      
832-995 A Humble TX 318J COMCAST IP PHONE, LLC 560      
936-224 A Conroe TX 318J COMCAST IP PHONE, LLC 560      
979-529 A Clute-Lake Jackson TX 318J COMCAST IP PHONE, LLC 560      
979-665 A Freeport TX 318J COMCAST IP PHONE, LLC 560      

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

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