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.
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Switch: TPLKNVXARS5

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
775-266 A Topaz Lake NV 4421 FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV 720      
775-266 1 Topaz Lake NV 4421 FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV 720      
775-266 3 Topaz Lake NV 4421 FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV 720      
775-266 4 Topaz Lake NV 4421 FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV 720      
775-266 9 Topaz Lake NV 4421 FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV 720      

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

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