Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX: 280

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-280 A Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920      
203-280 0 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-08-02   
203-280 1 Darien CT   145J TERRA NOVA TELECOM INC. 920   2022-04-17   
203-280 2 Darien CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2006-07-13   
203-280 3 Darien CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2004-07-22   
203-280 4 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-08-02   
203-280 5 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-05-14   
203-280 6 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-05-14   
203-280 7 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-05-14   
203-280 8 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-05-14   
203-280 9 Darien CT SMFRCTDSDS0  7230 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 920   2004-05-14   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

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