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: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-604 A Springfield MO SPFDMOMCXVX  321J HD CARRIER LLC 522      
417-604 0 Springfield MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 522   2025-09-06   
417-604 1 Springfield MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 522   2025-10-01   
417-604 2 Springfield MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 522   2025-10-01   
417-604 6 Springfield MO   6123 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 522   2025-10-21   
417-604 8 Springfield MO SPFDMOMCXVX  321J HD CARRIER LLC 522   2023-05-11   
417-604 9 Springfield MO SPFDMOMCXVX  321J HD CARRIER LLC 522   2023-05-11   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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