---
title: "Area code 608: Wisconsin, United States"
url: "https://lookvalid.com/area-code/608.md"
canonical_url: "https://lookvalid.com/area-code/608"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 608 serves Wisconsin, United States. Number formats, numbering rules, a live phone validator and the other codes in Wisconsin."
---

# Area code 608: Wisconsin, United States

Area code 608 serves Wisconsin, United States. Number formats, numbering rules, a live phone validator and the other codes in Wisconsin.

NANPA lists 785 central office codes (prefixes) in use in area code 608, held by 72 holders across 159 rate centers.
Wisconsin Bell holds the most prefixes, 80 (10%). 75% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 2,123 complaints on file for 1,750 numbers in 608, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1955-01-01
- Time zone: Central (C)
- Assigned overlays: 353 (2023-09-15)
- Prefixes in use: 785
- Pooled prefixes: 588 (75%)
- Rate centers: 159
- Companies holding prefixes: 72
- Assignment dates on file: 2001-01-15 to 2025-08-21 (358 prefixes)
- ZIP codes in its places: 165

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| MADISON | 197 | 25% |
| JANESVILLE | 45 | 6% |
| LA CROSSE | 41 | 5% |
| BELOIT | 25 | 3% |
| MIDDLETON | 17 | 2% |
| STOUGHTON | 13 | 2% |
| BARABOO | 12 | 2% |
| MONROE | 11 | 1% |
| 151 other rate centers | 424 | 54% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Wisconsin Bell | 80 | 10% |
| United States Cellular | 76 | 10% |
| Frontier North | 55 | 7% |
| Verizon Wireless | 54 | 7% |
| Onvoy | 50 | 6% |
| New Cingular Wireless PCS | 46 | 6% |
| 66 other carriers | 424 | 54% |

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.

## History

- 1955-01-01: Area code 608 went into service.
- 2023-09-15: Area code 353 went into service as an overlay in the same area as 608.

## Nearest area codes

The area codes closest to 608, measured between the centers of the ZIP code places they serve, are 563 (about 81 miles), 262 (about 95 miles), 920 (about 100 miles), 274 (about 114 miles) and 779 (about 126 miles).

## ZIP codes

165 ZIP codes fall in places that have a rate center in this area code. The places with the most are Madison, WI (35 ZIP codes), Janesville, WI (4 ZIP codes) and La Crosse, WI (3 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

2,123 complaints for 1,750 numbers. Numbers whose latest complaint falls in each year:

- 2023: 84
- 2024: 115
- 2025: 125

## Questions

### Where is area code 608?

NANPA assigns area code 608 to Wisconsin, United States.

### In which state does area code 608 sit?

Wisconsin. 608 is one of 8 area codes the NANPA table assigns to the state.

### Which places does area code 608 cover?

The places with the most ZIP codes among the rate centers in 608 are Madison, WI, Janesville, WI and La Crosse, WI. The rate center list on this page shows all of them.

### Who owns area code 608?

NANPA assigns area codes. Within 608, Wisconsin Bell holds the most prefixes, 80 prefixes or 10%.

### Which time zone does 608 use?

The NANPA NPA report lists the time zone for 608 as Central (C).

### What year did 608 enter service?

The NANPA NPA report gives an in-service date of 1955-01-01, so 608 has been in use since 1955.

### Does area code 608 have an overlay?

Yes. 353 (in service 2023-09-15) shares the same area with 608, so numbers from all of them are local to each other.

### Which area codes are nearest to 608?

The area codes closest to 608, measured between the centers of the ZIP code places they serve, are 563 (about 81 miles), 262 (about 95 miles), 920 (about 100 miles), 274 (about 114 miles) and 779 (about 126 miles).

### How many prefixes does area code 608 have?

NANPA's report dated 2026-10-17 lists 785 prefixes in service in 608, spread over 159 rate centers and 72 holders.

### Are there complaints about 608 numbers?

The FCC data on file has 2,123 complaints for 1,750 numbers in 608. They are unverified consumer reports. A number with no complaints on file is not proven safe.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).