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1988 MA Area Code Splits in 1988 and 1997 & Overlays in 2001

Bill inserts announcing Massachusetts Area Code Splits to subscribers -- 1988: 617 - 508; and 1997: 617 - 781 and 508 - 978. Maps show towns.
Overlays instead of splits were used in 2001 to create new phone numbers. Contributed by Paul Fassbender.

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