Area code 608: Wisconsin
What is area code 608?
Area code 608 is a US state area code for Wisconsin, on Central Time. It has 785 prefixes in service across 159 rate centers, the largest being Madison, Janesville and La Crosse. It shares its area with 353, so local numbers there can start with any of them. Local calls there take 10 digits.
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See the phone add-onArea code 608 facts
| Location | Wisconsin, United States |
|---|---|
| Time zone | Central Time |
| Overlays | 353 |
| In service since | January 1, 1955 |
| Local calls | 10 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
In short: 608 is Wisconsin (Central Time). Format checks here are free and run in your browser; the current carrier and line type need a live lookup. Bulk phone number validator · Pro + Phone plan
Local time in area code 608
America/Chicago
Prefixes in service
785 of 792 possible
159 rate centers
Which cities and towns use area code 608?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 608 rate centers with the most prefixes in service. 147 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Madison | 197 |
| Janesville | 45 |
| La Crosse | 41 |
| Beloit | 25 |
| Middleton | 17 |
| Stoughton | 13 |
| Baraboo | 12 |
| Monroe | 11 |
| Tomah | 10 |
| Dodgeville | 9 |
| Portage | 9 |
| Platteville | 8 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 608 number?
NANPA's dialling plan for 608: local calls inside the code take 10 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 608 | 608-555-0147 |
|---|---|
| From another US or Canadian area code | 1-608-555-0147 |
| From outside North America | +1 608 555 0147 |
| E.164, for CRMs and SMS tools | +16085550147 |
When did area code 608 start?
Area code 608 went into service on January 1, 1955. Today 608 and 353 cover the same area as an overlay, which is why 10-digit dialling is needed for local calls there.
Tools for 608 numbers
- Bulk phone number validator
Format, country and number type for every number in a CSV, with E.164 output.
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 608 number tells you where it was issued, not what it is now.
Mobiles, landlines and VoIP lines share area codes, and numbers move between carriers. A live line-type and carrier lookup on every number in your list says which is which, and that decides which calling and texting rules apply. It's in the phone add-on.
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Area code 608 questions
- What state is area code 608?
- Area code 608 is in Wisconsin, United States. Its largest rate centers by number of prefixes are Madison, Janesville, La Crosse, Beloit and Middleton.
- What time zone is area code 608 in?
- Central Time.
- What area codes overlay 608?
- 353. An overlay adds a new code to the same area instead of splitting it, so neighbours can have different area codes and local calls need 10 digits.
- When did area code 608 start?
- Area code 608 went into service on January 1, 1955.
- Is a 608 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 608 have?
- 785 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
- Does a valid format mean a 608 number is in service?
- No. A format check only says the digits fit the North American Numbering Plan and that 608 is an assigned code. It cannot tell whether the number is connected, who answers it or which carrier serves it today, because numbers are reassigned and ported. A live carrier lookup reports the current carrier and line type, but even that is not proof someone answers.
- Can I check a list of 608 numbers for free?
- Yes. Paste them in the list tab above or upload a CSV to the bulk phone number validator: format, E.164, country and the numbering-plan line type are free for every row, with no account. Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month).
Other area codes in Wisconsin
All Wisconsin area codes on the area code index.
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.