Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 503 [Rate centres in NPA 503] [Dial plan for NPA 503]

NXX: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
503-438 A St Helens OR TGRDORAODS0  7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
503-438 0 St Helens OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
503-438 1 St Helens OR PTLEORXMAMD  7537 LEVEL 3 TELECOM OF OREGON, LLC - OR 672      
503-438 2 St Helens OR TGRDORAODS0  7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672      
503-438 3 St Helens OR PTLDOR69X9X  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 672      
503-438 4 St Helens OR PTLGORIA7MD  3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672      
503-438 5 St Helens OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
503-438 6 St Helens OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672      
503-438 7 St Helens OR PTLDORWADS2  750E ONVOY, LLC - OR 672      
503-438 8 St Helens OR PTLDOR62GT2  6010 NEW CINGULAR WIRELESS PCS, LLC 672      
503-438 9 St Helens OR PTLDOR62GT2  6010 NEW CINGULAR WIRELESS PCS, LLC 672      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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