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: 464 [Rate centres in NPA 464] [Dial plan for NPA 464]

NXX: 277

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
464-277 A Summit IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2026-01-20   
464-277 0 Summit IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2026-01-20   
464-277 1 Summit IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2026-01-20   
464-277 8 Summit IL   224C ONVOY, LLC 358   2026-02-26   
464-277 9 Summit IL   6529 T-MOBILE USA, INC. 358   2026-01-21   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.