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Area code Verified Nov 1, 2026 · Source: NANPA

Area code 227 – Maryland

227 has served Maryland since 2023, split from 301. It is still largely empty: 142 of 786 number blocks allocated. No carrier dominates: AT&T 30.3%, Onvoy / Inteliquent 27.5%, T-Mobile 14.8%. It shares its geography with overlay codes 240, 301, so local calls take all ten digits. Spam complaints are comparatively rare: 70 in the 33 days to 30 October 2026, 382nd of the 422 codes with five or more complaints.

State
Maryland
In service since
2023
Time zone
Eastern
Shares area with
240, 301

Who holds 227 number blocks

Share of the 142 assigned NXX blocks (18.1% of the 786 possible), across 16 carriers. This is share of number blocks, not of subscribers.

  • AT&T30.3%
  • Onvoy27.5%
  • T-Mobile14.8%
  • Other CLEC / VoIP11.3%
  • Verizon8.5%
  • Bandwidth3.5%
  • Charter3.5%
  • Dish0.7%

Spam complaints naming 227

FTC Do Not Call complaints where the caller ID was a 227 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.

70 complaints in 33 days
#382 of 422 ranked codes

Rate centers in 227

NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 39.

WSNGTNZN1022
WSHNGTNZN215
MYERSVILLE13
LAUREL2369
FREDERICK8

Timeline

  1. 2023 227 goes into service, split from or overlaid on 301.

More about 227

Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.

All prefixes Every one of the 142 assigned NXX blocks, with the holder of each Local time Zone, UTC offset, clock changes and a live clock Spam complaints How often the code appears in FTC complaints, and what to do Carriers Who holds the number blocks, and why that is not who serves them 227 vs 240 Same area, different code – age, capacity and complaints side by side 227 vs 301 Same area, different code – age, capacity and complaints side by side

Frequently asked about 227

What state is area code 227?

Maryland. It covers the same area as 227/240/301.

Is a call from 227 a scam?

Not by itself. 227 drew 70 FTC complaints in the 33 days to 30 October 2026, 382nd of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.

Which carrier owns 227 numbers?

AT&T holds the largest share of assigned number blocks at 30.3%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.

Do I need to dial 10 digits in 227?

Yes – ten digits for local calls in 227, because it shares its area with another code.

Sources and verification

NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.

Nearby and related

301 Maryland240 Maryland301 Maryland