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.

Switch: NDADFLGGXFZ

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
305-357 A Miami FL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 46017   2025-01-28   
561-953 A Boca Raton FL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 46018   2025-01-28   
954-343 A Fort Lauderdale FL 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 46017   2025-01-28   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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