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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NPA: 540 [Rate centres in NPA 540] [Dial plan for NPA 540]

NXX: 580

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
540-580 A Roanoke VA RCMTVAXA5MD  6283 UNITED STATES CELLULAR - VA 244      
540-580 0 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 1 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 2 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 3 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 4 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 5 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 6 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 7 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 8 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      
540-580 9 Roanoke VA   6283 UNITED STATES CELLULAR - VA 244      

Last updated: Sat, 02 May 2026 12:20:53 UTC

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