Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX: 290

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-290 A Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-290 0 Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-290 1 Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-290 2 Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-290 3 Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-290 4 Washington Zone 11 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-02-23   
240-290 5 Washington Zone 11 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-07-04   
240-290 6 Washington Zone 11 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-02-23   
240-290 7 Washington Zone 11 MD   145J TERRA NOVA TELECOM INC. 236   2023-08-06   
240-290 8 Washington Zone 11 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-02-23   
240-290 9 Washington Zone 11 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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