Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 417 [Rate centres in NPA 417] [Dial plan for NPA 417]

NXX: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-637 A Greenfield MO GNFDMOXADS1  1151 BRIGHTSPEED OF EAST MISSOURI, LLC 522      
417-637 0 Greenfield MO   1151 BRIGHTSPEED OF EAST MISSOURI, LLC 522      
417-637 2 Greenfield MO   1151 BRIGHTSPEED OF EAST MISSOURI, LLC 522      
417-637 3 Greenfield MO   093F ONVOY, LLC - MO 522   2019-09-02   
417-637 4 Greenfield MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 522   2023-02-24   
417-637 5 Greenfield MO   1151 BRIGHTSPEED OF EAST MISSOURI, LLC 522      
417-637 6 Greenfield MO   593K MCC TELEPHONY LLC 522   2010-06-13   
417-637 7 Greenfield MO   145J TERRA NOVA TELECOM INC. 522   2025-07-18   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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