Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

NXX: 341

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-341 A Plano IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-341 0 Plano IL   224C ONVOY, LLC 358   2024-03-03   
331-341 1 Plano IL   515J IP HORIZON LLC 358   2021-06-27   
331-341 2 Plano IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-08-27   
331-341 3 Plano IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-08-27   
331-341 4 Plano IL CHCGILNEXIX  506J TWILIO INTERNATIONAL, INC. 358   2021-08-30   
331-341 5 Plano IL   624H ONVOY SPECTRUM, LLC 358   2024-04-19   
331-341 7 Plano IL   6529 T-MOBILE USA, INC. 358   2024-03-08   
331-341 8 Plano IL   6529 T-MOBILE USA, INC. 358   2024-03-08   
331-341 9 Plano IL   6529 T-MOBILE USA, INC. 358   2024-03-08   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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