<P> Area code 978 was created as a split from area code 508 on September 1 , 1997 and covers north central and most of northeastern Massachusetts ( LATA code 128 ) . Use of 978 became mandatory on February 1 , 1998 . Prior to when this area was served by 508 ( July 1988 ) , it was served only by the 617 area code , along with the rest of the eastern two - thirds of the state . 351 has been sharing the service area since May 2 , 2001 . Since then , 10 digit local dialing is mandatory . </P>
<P> Area code 978 was created as a split from area code 508 on September 1 , 1997 and covers north central and most of northeastern Massachusetts ( LATA code 128 ) . Use of 978 became mandatory on February 1 , 1998 . Prior to when this area was served by 508 ( July 1988 ) , it was served only by the 617 area code , along with the rest of the eastern two - thirds of the state . 351 has been sharing the service area since May 2 , 2001 . Since then , 10 digit local dialing is mandatory . </P>
where is area code 978 located in usa
where is area code 978 located in usa
north central and most of northeastern Massachusetts
north central and most of northeastern Massachusetts