What is the area code for Frederick, MD?

Frederick uses 3 area codes: 240, 301 and 227. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.

What time zone is Frederick in?

Frederick is in the Eastern time zone.

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Frederick, MD Area Codes

Frederick, Maryland (population 92,059) uses area codes 240, 301 and 227.

Area code240

Area code301

Area code227

Time zoneEastern

Local time now…

Frederick and nearby cities in area code 240

Carriers with Frederick numbers

88 prefixes are assigned to the Frederick exchange: 34% mobile, 22% VoIP and cable, 44% landline.

Carrier	Prefixes
Verizon	28
Verizon Wireless	17
Onvoy (Sinch)	9
AT&T Mobility	7
T-Mobile	6
Metropcs	4
Verizon Business (MCImetro)	3
Lumen (Level 3)	2

Area codes used in Frederick

Area code	Prefixes serving Frederick	Main carriers in this code
240	43	T-Mobile, Verizon Wireless, AT&T Mobility
301	37	Verizon, Verizon Wireless, AT&T Mobility
227	8	Onvoy (Sinch), AT&T Mobility, T-Mobile

Frederick phone number prefixes

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

240-215 Lumen (Level 3)
240-225 Core Communications
240-236 Verizon
240-285 Verizon Wireless
240-315 Verizon
240-344 AT&T Mobility
240-357 Verizon Wireless
240-367 T-Mobile
240-379 Verizon
240-397 Verizon Wireless
240-405 Paetec Itel
240-409 AT&T Mobility
240-415 magicJack (YMax)
240-422 T-Mobile
240-439 Verizon Wireless
240-440 AT&T Mobility
240-446 Verizon Wireless
240-457 Verizon Wireless
240-529 Verizon
240-549 Verizon Wireless
240-566 Verizon
240-575 Lumen (Level 3)
240-578 Verizon Wireless
240-586 Verizon
240-608 Nuso
240-626 T-Mobile
240-629 Verizon
240-651 Verizon Wireless
240-656 AT&T Mobility
240-674 Metropcs
240-680 Peerless Network
240-710 Verizon Business (MCImetro)
240-739 Ip Horizon
240-741 Airespring
240-772 Verizon Wireless
240-792 T-Mobile
240-815 Verizon Wireless
240-831 Onvoy (Sinch)
240-840 Onvoy (Sinch)
240-877 Onvoy (Sinch)
240-910 Onvoy (Sinch)
240-931 Nuso
240-971 Lumen (CenturyLink)
301-228 Verizon
301-305 Metropcs
301-360 Verizon
301-378 Comcast (Xfinity)
301-401 AT&T Mobility
301-418 Verizon
301-471 Verizon Wireless
301-473 Verizon
301-514 Verizon Wireless
301-524 T-Mobile
301-600 Verizon
301-606 Verizon Wireless
301-619 Verizon
301-620 Verizon
301-624 Verizon
301-631 Verizon
301-639 Verizon Wireless
301-644 Verizon
301-662 Verizon
301-663 Verizon
301-668 Verizon
301-673 AT&T Mobility
301-676 AT&T Mobility
301-682 Verizon
301-693 T-Mobile
301-694 Verizon
301-695 Verizon
301-696 Verizon
301-698 Verizon
301-712 Verizon Business (MCImetro)
301-732 Metropcs
301-748 Metropcs
301-788 Verizon Wireless
301-815 Verizon
301-835 Vonage
301-846 Verizon
301-898 Verizon
227-203 Verizon Business (MCImetro)
227-223 Commio
227-226 Onvoy (Sinch)
227-253 Onvoy (Sinch)
227-281 Verizon Wireless
227-317 Onvoy (Sinch)
227-666 Onvoy (Sinch)
227-800 Onvoy (Sinch)

Nearby cities in area code 240

Questions

What is the area code for Frederick, MD?: Frederick uses 3 area codes: 240, 301 and 227. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Frederick in?: Frederick is in the Eastern time zone.