Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 541 [Rate centres in NPA 541] [Dial plan for NPA 541]

NXX: 581

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
541-581 A Lowell OR EUGNOR53ZMD  076F BANDWIDTH.COM CLEC, LLC - OR 670      
541-581 0 Lowell OR EUGNOR53ZMD  076F BANDWIDTH.COM CLEC, LLC - OR 670      
541-581 1 Lowell OR EUGNOR53KMD  750E ONVOY, LLC - OR 670      
541-581 2 Lowell OR EUGNOR53KMD  750E ONVOY, LLC - OR 670      
541-581 3 Lowell OR MDFDOR87PS0  352D CHARTER FIBERLINK OR-CCVII, LLC - OR 670      
541-581 4 Lowell OR EUGNOR53XXX  073H TELNYX LLC 670      
541-581 5 Lowell OR MDFDORRJDS0  826H INTEGRATED PATH COMMUNICATIONS-OREGON, LLC - OR 670      
541-581 6 Lowell OR EUGNOR53XUX  624H ONVOY SPECTRUM, LLC 670      
541-581 7 Lowell OR EUGNOR53XCX  508J CENTURYLINK COMMUNICATIONS, LLC 670      
541-581 8 Lowell OR EUGNOR53KMD  750E ONVOY, LLC - OR 670      
541-581 9 Lowell OR EUGNOR53XUX  624H ONVOY SPECTRUM, LLC 670      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.