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: 502

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-502 A Geneseo IL DVNPIA80XPX  6529 T-MOBILE USA, INC. 634      
309-502 0 Geneseo IL DVNPIA80XPX  6529 T-MOBILE USA, INC. 634   2011-03-15   
309-502 1 Geneseo IL DVNPIA80XPX  6529 T-MOBILE USA, INC. 634   2006-10-30   
309-502 2 Geneseo IL DVNPIAEAXMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 634   2023-06-13   
309-502 3 Geneseo IL DVNPIA80XPX  6529 T-MOBILE USA, INC. 634   2023-12-23   
309-502 7 Geneseo IL RCISILRIXMD  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 634   2020-10-12   
309-502 8 Geneseo IL DVNPIAEAXMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 634   2019-11-11   
309-502 9 Geneseo IL DVNPIA80XPX  5562 METROPCS, INC. 634      

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.