Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 504 [Rate centres in NPA 504] [Dial plan for NPA 504]

NXX: 639

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
504-639 A New Orleans LA NWORLASDSMD  824J OPENTACT INC. 490   2026-05-18   
504-639 0 New Orleans LA   749E ONVOY, LLC - LA 490   2026-09-12   
504-639 6 New Orleans LA NWORLAMA55Z  653C TELEPORT COMMUNICATIONS AMERICA LA - LLC 490   2026-06-04   
504-639 7 New Orleans LA NWORLASDSMD  824J OPENTACT INC. 490   2026-05-18   
504-639 8 New Orleans LA NWORLASDJMD  490J BOOST SUBSCRIBERCO L.L.C. 490   2026-10-22   
504-639 9 New Orleans LA NWORLASDJMD  490J BOOST SUBSCRIBERCO L.L.C. 490   2026-09-24   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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