Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 440 [Rate centres in NPA 440] [Dial plan for NPA 440]

NXX: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
440-578 A Mentor OH CLEVOHIWDS0  7443 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 320      
440-578 0 Mentor OH   464C ONVOY, LLC - OH 320   2020-01-09   
440-578 1 Mentor OH   7443 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 320      
440-578 2 Mentor OH   829J PAETEC ITEL, LLC 320   2009-11-16   
440-578 3 Mentor OH   7532 TELEPORT COMMUNICATIONS AMERICA, LLC - OH 320   2022-08-22   
440-578 5 Mentor OH   829J PAETEC ITEL, LLC 320   2008-06-20   
440-578 6 Mentor OH   7443 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 320      
440-578 7 Mentor OH   464C ONVOY, LLC - OH 320   2020-01-09   
440-578 8 Mentor OH   793K TWC IP ENABLED SERVICES, LLC 320   2018-07-13   
440-578 9 Mentor OH   464C ONVOY, LLC - OH 320   2018-02-26   

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

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