The 227 area code covers the same area as 301, including Washington, D.C. suburbs, Frederick and 41 more places in Maryland.
Area code 227 is in Maryland, on Eastern Time. In the 227 area, phone numbers are given out most in Frederick County, then Montgomery and Charles counties. It has been in service since June 14, 2023. 240 and 301 cover the same area, so two neighbours can have different area codes.
- Where
- 8 counties in Maryland, mostly Frederick County, Montgomery County and Charles County
- Time zone
- Eastern Time
- In service since
- June 14, 2023
- Shares its area with
- 240 (since 1997) and 301 (since 1947)
- Prefixes in use
- 141
- How to dial
- Local calls need all 10 digits: 227-555-0142.
Find out who called you from a 227 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (227) number is on today, use our free carrier lookup.
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Washington, D.C. suburbs holds 47% of the phone prefixes in area code 227.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 141 prefixes in use shows where 227 numbers are actually given out.
- Washington, D.C. suburbs66 prefixes, 47%
- Myersville13 prefixes, 9%
- Laurel9 prefixes, 6%
- Frederick8 prefixes, 6%
- Ashton8 prefixes, 6%
- Gaithersburg7 prefixes, 5%
- Waldorf6 prefixes, 4%
- Hagerstown3 prefixes, 2%
Also served: Damascus, Leonardtown, Myersville and Oakland and 31 smaller places.
Of the carriers named here, AT&T Mobility holds the most phone number prefixes in area code 227: 41 of 141.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 141 prefixes in use in 227 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| AT&T MobilityMobile network | 41 | 29% |
| T-MobileMobile network | 21 | 15% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 5 | 4% |
| Wide Voice | 5 | 4% |
| AT&T | 2 | 1% |
| Boost MobileMobile phone service | 1 | <1% |
| 8 other carriers | 66 | 47% |
100% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
227 started in 2023 as an overlay on 301, and its ground has not changed since.
2023
227 starts on June 14, 2023, as an overlay on 301: new numbers on the same ground.
A 227 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 227 are 703, 202 and 717.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
Maryland has 5 other area codes.
These are the questions people ask most about area code 227.
Where is area code 227?
227 covers Washington, D.C. suburbs, Frederick, Gaithersburg and Laurel and 39 more places in Maryland. In the 227 area, phone numbers are given out most in Frederick County, then Montgomery and Charles counties.
What state is area code 227 in?
Maryland. 227 is a Maryland area code on Eastern Time.
What cities use area code 227?
The places holding the most 227 prefixes are Washington, D.C. suburbs, Frederick, Gaithersburg, Laurel, Waldorf, Hagerstown, Cumberland and Ashton, out of 43 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 227?
No single phone company owns 227. NANPA's records list its 141 prefixes across many carriers, and the ones named on this page include AT&T Mobility, T-Mobile and Bandwidth. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 227 in?
227 is on Eastern Time.
When did area code 227 start?
227 went into service on June 14, 2023, as an overlay on 301: new numbers for the same area.
Is 227 the same area as 240 and 301?
Yes. 240 (since 1997) and 301 (since 1947) cover the same ground as 227. Nobody's number changed when they were added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 227 number?
Local calls need all 10 digits: 227-555-0142.
Is 227 a toll-free number?
No. 227 is a regular area code for Washington, D.C. suburbs and Frederick in Maryland, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 227?
The closest are 703/571 (Washington, D.C. suburbs, Virginia), 202/771 (Washington, D.C.), 717/223 (Harrisburg, Pennsylvania) and 410/443/667 (Baltimore, Maryland), measured between the centres of each area.
Who called me from a 227 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 227 a scam?
227 is a real Maryland area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.