Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 978 [Rate centres in NPA 978] [Dial plan for NPA 978]

NXX: 577

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-577 A Westford MA   829J PAETEC ITEL, LLC 128      
978-577 0 Westford MA   829J PAETEC ITEL, LLC 128      
978-577 1 Westford MA   829J PAETEC ITEL, LLC 128      
978-577 2 Westford MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-03-15   
978-577 3 Westford MA   829J PAETEC ITEL, LLC 128   2008-12-30   
978-577 4 Westford MA CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2009-11-23   
978-577 5 Westford MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-10-21   
978-577 6 Westford MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2010-03-29   
978-577 7 Westford MA NRTNMAAACM4  5562 METROPCS, INC. 128   2011-05-08   
978-577 8 Westford MA NRTNMAAACM4  5562 METROPCS, INC. 128   2011-08-11   
978-577 9 Westford MA NRTNMAAACM4  5562 METROPCS, INC. 128   2011-09-29   

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

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