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: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 544

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-544 A Macomb IL MCMBILXDX7X  622J SKYE TELECOM LLC DBA SKYETEL 977      
309-544 0 Macomb IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 977      
309-544 4 Macomb IL   622J SKYE TELECOM LLC DBA SKYETEL 977   2021-12-09   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.