Area code 274 – Wisconsin
274 has served Wisconsin since 2023, split from 920. It is still largely empty: 29 of 786 number blocks allocated. No carrier dominates: T-Mobile 24.1%, Onvoy / Inteliquent 24.1%, Other CLEC / VoIP 20.7%. It shares its geography with overlay codes 920, so local calls take all ten digits. Spam complaints are comparatively rare: 10 in the 33 days to 30 October 2026, 402nd of the 422 codes with five or more complaints.
Who holds 274 number blocks
Share of the 29 assigned NXX blocks (3.7% of the 786 possible), across 12 carriers. This is share of number blocks, not of subscribers.
- T-Mobile37.9%
- Onvoy24.1%
- Other CLEC / VoIP20.7%
- Charter6.9%
- AT&T6.9%
- Verizon3.4%
Spam complaints naming 274
FTC Do Not Call complaints where the caller ID was a 274 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.
Rate centers in 274
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 25.
Timeline
- 2023 274 goes into service, split from or overlaid on 920.
More about 274
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.
Frequently asked about 274
What state is area code 274?
Wisconsin. It covers the same area as 274/920.
Is a call from 274 a scam?
Not by itself. 274 drew 10 FTC complaints in the 33 days to 30 October 2026, 402nd 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 274 numbers?
T-Mobile holds the largest share of assigned number blocks at 24.1%. 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 274?
Yes – ten digits for local calls in 274, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.