857 Area Code - World Time Zone Map

World Time Zone Map Massachusetts Area Codes 857

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857 Area code

Eastern Time

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857 is an area code located in the state of Massachusetts, US. The largest city it serves is Boston.

Location, time zone and map of the 857 area code

Local time

--:-- EST

Time difference to GMT/UTC

Standard time:	UTC/GMT -5:00 hours
No daylight saving time at the moment

Daylight Saving Time 2025 (Summer Time)

DST starts on Sunday 09 March 2025, 02:00 DST ends on Sunday 02 November 2025, 02:00

Time zone

The 857 area code lies within the Eastern Time (ET)

EST - Eastern Standard TimeEDT - Eastern Daylight Time when daylight saving time is being observed (from early March to early November)

Location

857 Area code location map

Major cities and communities served by area code 857

Suffolk County

• Boston
• Chelsea
• Winthrop

Middlesex County

• Cambridge
• Newton
• Somerville
• Everett
• Watertown
• Belmont

Norfolk County

• Quincy
• Brookline
• Milton

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