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: 939

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-939 A Astoria IL MCMBILXDX8X  506J TWILIO INTERNATIONAL, INC. 977      
309-939 2 Astoria IL MCMBILXDX9X  224C ONVOY, LLC 977   2021-07-05   
309-939 3 Astoria IL MCMBILXDX5X  624H ONVOY SPECTRUM, LLC 977   2023-07-29   
309-939 4 Astoria IL MCMBILXDX9X  224C ONVOY, LLC 977   2021-10-16   
309-939 8 Astoria IL MCMBILXDX8X  506J TWILIO INTERNATIONAL, INC. 977   2022-06-17   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.