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: 224 [Rate centres in NPA 224] [Dial plan for NPA 224]

NXX: 684

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
224-684 A Northbrook IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2026-04-17   
224-684 5 Northbrook IL ELGNILOTGT5  5562 METROPCS, INC. 358   2026-07-12   
224-684 7 Northbrook IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2026-05-29   
224-684 8 Northbrook IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2026-04-17   
224-684 9 Northbrook IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2026-04-17   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.