Area code
414
414 is a United States area code. Under the North American Numbering Plan it belongs to Wisconsin, which has 8 area codes in total.
Validate a number in 414
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 414 at a glance
NANPA lists 551 central office codes (prefixes) in use in area code 414, held by 31 holders across 4 rate centers.
| Fact | Value |
|---|---|
| In service since | 1947-01-01 |
| Time zone | Central (C) |
| Prefixes in use | 551 |
| Pooled prefixes | 339 (62%) |
| Rate centers | 4 |
| Companies holding prefixes | 31 |
| Assignment dates on file | 2001-02-02 to 2026-03-18 (193 prefixes) |
Rate centers in area code 414
The largest rate center is MILWAUKZN1, with 437 prefixes (79%).
| Rate center | Prefixes | Share |
|---|---|---|
| MILWAUKZN1 | 437 | 79% |
| MILWAUKZN4 | 45 | 8% |
| MILWAUKZN5 | 38 | 7% |
| MILWAUKZN3 | 31 | 6% |
Who holds the prefixes in 414
Wisconsin Bell holds the most prefixes, 189 (34%). 62% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Wisconsin Bell | 189 | 34% |
| T-Mobile USA | 54 | 10% |
| New Cingular Wireless PCS | 51 | 9% |
| United States Cellular | 47 | 9% |
| Onvoy | 30 | 5% |
| Verizon Wireless | 25 | 5% |
| 25 other carriers | 155 | 28% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 414
- 1947-01-01 Area code 414 went into service.
- 1997-07-26 Area code 920 went into service and names 414 as its parent.
- 1999-09-25 Area code 262 went into service and names 414 as its parent.
Complaints on file for 414 numbers
2,722 FCC complaints are on file for 2,181 numbers in 414, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 129 |
| 2024 | 108 |
| 2025 | 97 |
Other area codes in Wisconsin
Wisconsin is one state with 8 area codes in the NANPA table. 414 is one of them.
Next to 414 in the numbering table
These are the codes just before and after 414 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 414 was first assigned in Wisconsin. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Wisconsin next to a 414 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 414
Where is area code 414?
NANPA assigns area code 414 to Wisconsin, United States.
In which state does area code 414 sit?
Wisconsin. 414 is one of 8 area codes the NANPA table assigns to the state.
Who owns area code 414?
NANPA assigns area codes. Within 414, Wisconsin Bell holds the most prefixes, 189 prefixes or 34%.
Which time zone does 414 use?
The NANPA NPA report lists the time zone for 414 as Central (C).
What year did 414 enter service?
The NANPA NPA report gives an in-service date of 1947-01-01, so 414 has been in use since 1947.
Does area code 414 have an overlay?
The NANPA NPA report lists no other area code in an overlay with 414.
How many prefixes does area code 414 have?
NANPA's report dated 2026-10-17 lists 551 prefixes in service in 414, spread over 4 rate centers and 31 holders.
Are there complaints about 414 numbers?
The FCC data on file has 2,722 complaints for 2,181 numbers in 414. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.