Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 872 [Rate centres in NPA 872] [Dial plan for NPA 872]

NXX: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
872-387 A Chicago Zone 09-South Chicago IL   224C ONVOY, LLC 358   2025-11-13   
872-387 0 Chicago Zone 09-South Chicago IL   224C ONVOY, LLC 358   2025-11-13   
872-387 1 Chicago Zone 09-South Chicago IL   224C ONVOY, LLC 358   2025-11-13   
872-387 2 Chicago Zone 09-South Chicago IL   6529 T-MOBILE USA, INC. 358   2025-11-14   
872-387 6 Chicago Zone 09-South Chicago IL   6529 T-MOBILE USA, INC. 358   2025-11-14   
872-387 8 Chicago Zone 09-South Chicago IL   6529 T-MOBILE USA, INC. 358   2025-12-19   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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