─────── § 04. NPA RECORD · 351 · FOLIO 0153 OF 0801 ──────────────
351
United States NPA Record
Area code 351 is an overlay for the 978 numbering plan area in Massachusetts, introduced in 2001 to provide additional numbering resources.
Area code 351 is an overlay for the 978 numbering plan area in Massachusetts, introduced in 2001 to provide additional numbering resources.
IN SERVICEFirst record · 2001
§ 04.05Event Summary
mandatory dialing · 1
§ 04.06
Documentary Record · 2 events
CHRONOLOGICAL ORDER
2001-05-02
NPA 351 overlay introduced for 978
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2001-05-02
mandatory dialing
Mandatory ten-digit dialing began for 978/351
Ten-digit dialing became mandatory for all telephone calls in the 978 and 351 area codes on May 2, 2001, coinciding with the introduction of the 351 overlay.
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