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: BLBNMOXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
660-538 A Blackburn MO 1811 EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO 524      
660-538 0 Blackburn MO 1811 EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO 524      
660-538 4 Blackburn MO 1811 EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO 524      

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

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