Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 720 [Rate centres in NPA 720] [Dial plan for NPA 720]

NXX: 731

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-731 A Longmont CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-731 0 Longmont CO   073H TELNYX LLC 656   2019-03-05   
720-731 1 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   
720-731 2 Longmont CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2019-03-04   
720-731 3 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   
720-731 4 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   
720-731 5 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   
720-731 6 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   
720-731 7 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   
720-731 8 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   
720-731 9 Longmont CO   6529 T-MOBILE USA, INC. 656   2019-03-05   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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