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Area code Verified Nov 1, 2026 · Source: NANPA

Area code 414 – Wisconsin

414 is one of the original area codes, in service across Wisconsin since 1947. 552 of its 786 number blocks are allocated (70%). AT&T is the largest holder with 47.1% of blocks, ahead of T-Mobile at 9.8%. 677 FTC complaints named a 414 caller ID in the 33 days to 30 October 2026, putting it 143rd of 422 codes with five or more complaints.

State
Wisconsin
In service since
1947
Time zone
Central
Shares area with
No overlay

Who holds 414 number blocks

Share of the 552 assigned NXX blocks (70.2% of the 786 possible), across 31 carriers. This is share of number blocks, not of subscribers.

  • AT&T47.1%
  • Other CLEC / VoIP12.1%
  • T-Mobile11.8%
  • Verizon6.2%
  • Onvoy5.6%
  • Lumen3.8%
  • Spok3.3%
  • Windstream2.4%
  • Charter2.4%
  • American Messaging2%
  • Bandwidth1.4%
  • Peerless0.9%
  • TDS0.7%
  • Vonage0.4%

Spam complaints naming 414

FTC Do Not Call complaints where the caller ID was a 414 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.

677 complaints in 33 days
#143 of 422 ranked codes

Rate centers in 414

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.

MILWAUKZN1438
MILWAUKZN445
MILWAUKZN538
MILWAUKZN331

Timeline

  1. 1947 414 assigned in the original North American Numbering Plan.

More about 414

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 552 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

Frequently asked about 414

What state is area code 414?

Wisconsin.

Is a call from 414 a scam?

Not by itself. 414 drew 677 FTC complaints in the 33 days to 30 October 2026, 143rd 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 414 numbers?

AT&T holds the largest share of assigned number blocks at 47.1%. 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 414?

Yes – ten digits for local calls in 414, 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.