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.

NPA: 636 [Rate centres in NPA 636] [Dial plan for NPA 636]

NXX: 728

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-728 A Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 0 Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 1 Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 2 Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 3 Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 5 Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 6 Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 7 Chesterfield MCA3 MO CHFDMO52DSA  9533 SOUTHWESTERN BELL 520      
636-728 8 Chesterfield MCA3 MO STLVMOOH2MD  6529 T-MOBILE USA, INC. 520      
636-728 9 Chesterfield MCA3 MO STLSMO05RMD  993E BANDWIDTH.COM CLEC, LLC - MO 520      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.