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Cambridge, MA Area Codes

Cambridge, Massachusetts (population 122,588) uses area codes 617 and 857.

Area code617
Area code857
Time zoneEastern
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Cambridge and nearby cities in area code 617

Carriers with Cambridge numbers

141 prefixes are assigned to the Cambridge exchange: 23% mobile, 23% VoIP and cable, 54% landline.

CarrierPrefixes
Verizon49
T-Mobile15
AT&T Mobility11
Verizon Business (MCImetro)10
Tc Systems7
Lumen (Level 3)7
Paetec Itel7
Bandwidth6

Area codes used in Cambridge

Area codePrefixes serving CambridgeMain carriers in this code
617112Verizon, Verizon Business (MCImetro), AT&T Mobility
85729Verizon Wireless, T-Mobile, Onvoy (Sinch)

Cambridge phone number prefixes

Numbers starting with these first six digits were originally assigned to the Cambridge exchange.

Nearby cities in area code 617

Questions

What is the area code for Cambridge, MA?
Cambridge uses 2 area codes: 617 and 857. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Cambridge in?
Cambridge is in the Eastern time zone.