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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OCN: 636G RADCOM CORPORATION, NV DBA UTS

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
721-553 A Philipsburg SM SWCHSFUNKNO  830      
721-554 A Philipsburg SM SWCHSFUNKNO  830      
721-580 A Philipsburg SM SWCHSFUNKNO  830      
721-581 A Philipsburg SM SWCHSFUNKNO  830      
721-584 A Philipsburg SM SWCHSFUNKNO  830      
721-585 A Philipsburg SM SWCHSFUNKNO  830      
721-586 A Philipsburg SM SWCHSFUNKNO  830      
721-587 A Philipsburg SM SWCHSFUNKNO  830      
721-588 A Philipsburg SM SWCHSFUNKNO  830      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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