What is the area code for Groton, CT?

Groton uses 2 area codes: 860 and 959. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.

What time zone is Groton in?

Groton is in the Eastern time zone.

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Groton, Connecticut (population 10,160) uses area codes 860 and 959.

Area code860

Area code959

Time zoneEastern

Local time now…

Groton has no telephone exchange of its own in NANPA records; it is served by the New London exchange about 2.6 km away.

Groton and nearby cities in area code 860

47 prefixes are assigned to the New London exchange: 26% mobile, 19% VoIP and cable, 55% landline.

Area code	Prefixes serving Groton	Main carriers in this code
860	40	Frontier, Verizon Business (MCImetro), Verizon Wireless
959	7	Onvoy (Sinch), Ton80 Communications, Verizon Wireless

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

What is the area code for Groton, CT?: Groton uses 2 area codes: 860 and 959. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Groton in?: Groton is in the Eastern time zone.