Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

NXX: 624

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-624 A Chicago Zone 01-Canal IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-624 0 Chicago Zone 01-Canal IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-624 1 Chicago Zone 01-Canal IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-624 2 Chicago Zone 01-Canal IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-624 3 Chicago Zone 01-Canal IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-624 4 Chicago Zone 01-Canal IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-624 5 Chicago Zone 01-Canal IL CHCGILACGT0  8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 358      
312-624 6 Chicago Zone 01-Canal IL CHCGILTCDS0  7056 XO ILLINOIS, INC. 358   2004-07-04   
312-624 7 Chicago Zone 01-Canal IL CHCGILTCDS0  7056 XO ILLINOIS, INC. 358   2004-07-04   
312-624 8 Chicago Zone 01-Canal IL CHCGILNEXJX  318J COMCAST IP PHONE LLC 358   2007-08-31   
312-624 9 Chicago Zone 01-Canal IL CHCGILNEXJX  318J COMCAST IP PHONE LLC 358   2007-08-31   

Last updated: Fri, 13 May 2022 22:16:13 UTC

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