Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 281 [Rate centres in NPA 281] [Dial plan for NPA 281]

NXX: 378

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
281-378 A Tomball EMS TX TBLLTXKLDS0  9533 SOUTHWESTERN BELL 560      
281-378 0 Tomball EMS TX   9533 SOUTHWESTERN BELL 560      
281-378 1 Tomball EMS TX   9533 SOUTHWESTERN BELL 560      
281-378 2 Tomball EMS TX   7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2007-02-20   
281-378 3 Tomball EMS TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2007-06-19   
281-378 4 Tomball EMS TX   903C ONVOY, LLC - TX 560   2005-03-31   
281-378 5 Tomball EMS TX   903C ONVOY, LLC - TX 560   2005-03-31   
281-378 6 Tomball EMS TX   903C ONVOY, LLC - TX 560   2006-12-14   
281-378 7 Tomball EMS TX   903C ONVOY, LLC - TX 560   2006-12-14   
281-378 8 Tomball EMS TX   515J IP HORIZON LLC 560   2013-08-13   
281-378 9 Tomball EMS TX   9533 SOUTHWESTERN BELL 560      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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