Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 773 [Rate centres in NPA 773] [Dial plan for NPA 773]

NXX: 740

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-740 A Chicago Zone 02-Edgewater IL   224C ONVOY, LLC 358      
773-740 0 Chicago Zone 02-Edgewater IL   224C ONVOY, LLC 358   2025-09-29   
773-740 1 Chicago Zone 02-Edgewater IL   224C ONVOY, LLC 358   2025-09-29   
773-740 2 Chicago Zone 02-Edgewater IL   224C ONVOY, LLC 358   2025-11-08   
773-740 3 Chicago Zone 02-Edgewater IL   224C ONVOY, LLC 358   2025-11-08   
773-740 4 Chicago Zone 02-Edgewater IL   321J HD CARRIER LLC 358   2025-10-04   
773-740 5 Chicago Zone 02-Edgewater IL   224C ONVOY, LLC 358   2026-03-26   

Last updated: Sun, 17 May 2026 03:26:51 UTC

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