Pick 301 or 240 for Silver Spring, Bethesda or Frederick.
301 is an original code of 1947, and 240 was laid over it in 1997.
Maryland has six area codes: 301, 410, 240, 443, 667 and 227.
Area codes in Maryland
Get a phone number with the right area code for Maryland.
301 and 240 cover Montgomery County and western Maryland, from Silver Spring and Bethesda to Frederick and Hagerstown. 410, 443 and 667 cover Baltimore, Annapolis and the Eastern Shore.
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Maryland has six area codes.
In the order they opened.
- 301Since 1947Montgomery County and western Maryland
211 FCC complaints
Get a 301 number - 410Since 1991Baltimore
128 FCC complaints
Get a 410 number - 240Since 1997Silver Spring, Frederick and Hagerstown
173 FCC complaints
Get a 240 number - 443Since 1997Baltimore and the Eastern Shore
128 FCC complaints
Get a 443 number - 667Since 2012Baltimore and the Eastern Shore
70 FCC complaints
Get a 667 number - 227Since 2023No page yet
24 FCC complaints
227
The newest area code in Maryland is 227.
227 entered service in 2023, laid over the 301 and 240 area in Montgomery County and western Maryland.
Pick 301 for Silver Spring and Bethesda, or 410 for Baltimore and Towson.
Pick 410 for Baltimore, Towson or Columbia.
410 was split from 301 in 1991, and 443 was laid over it in 1997.
Pick 443 or 667 for Baltimore and Annapolis.
667 came in 2012 over the same ground as 443, which reaches the Eastern Shore as well as Baltimore.
People filed 734 FCC complaints about unwanted calls from Maryland area codes in 12 months.
From October 2025 to September 2026, 734 unwanted-call complaints filed with the FCC gave a caller ID number that started with one of the Maryland codes. 301 was named most, on 211 of them (29%).
- 734unwanted-call complaints named a Maryland code
- 301was named on the most of them, 211
- 29%of the Maryland complaints named 301
Source: Federal Communications Commission, CGB - Consumer Complaints Data (dataset 3xyp-aqkj), issue "Unwanted Calls", read on November 4, 2026. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
This is how you get a Maryland number.
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Start your free week.
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- 2
Type the code you picked.
Open Create a number, type the three digits and give the number a name.
- 3
Hand the number out.
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People ask these questions about Maryland area codes.
More in the full FAQ.
443 and 667 both cover Annapolis, along with Baltimore, Columbia and Towson.
No. Hagerstown uses 301 and 240, with Frederick and Silver Spring. Baltimore uses 410, 443 and 667.
Maryland has six area codes in service, by the numbering administrator's report of October 23, 2026: 301, 410, 240, 443, 667 and 227. They are listed in the order they opened, from 1947 to 2023.
The newest area code in Maryland is 227, in service since 2023. 227 entered service in 2023, laid over the 301 and 240 area in Montgomery County and western Maryland.
From October 2025 to September 2026, people filed 734 FCC complaints about unwanted calls from numbers that start with a Maryland code. The five named most were 301 (211), 240 (173), 410 (128), 443 (128) and 667 (70). A complaint is one person's report. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
Yes. You type the area code you want when you create a number, and you do not need to live in Maryland. Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
No. Your numbers are receive-only: they take calls and texts, and they never make them. You answer calls on your own phone, and you cannot reply to a text from the inbox.
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Cities in Maryland
States next to Maryland
More area codes
Every fact on this page comes from public numbering records.
The codes, the places and the years are rows of the North American Numbering Plan Administrator's area code database (its report of October 23, 2026), and the complaints are the FCC's own.
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