The 513 area code covers Cincinnati, Hamilton and 17 more places in Ohio.
Area code 513 is in Ohio, on Eastern Time. In the 513 area, phone numbers are given out most in Hamilton County, then Butler and Warren counties. It has been in service since 1947. 283 covers the same area, so two neighbours can have different area codes.
- Where
- 5 counties in Ohio, mostly Hamilton County, Butler County and Warren County
- Time zone
- Eastern Time
- In service since
- 1947, one of the original area codes
- Shares its area with
- 283 (since 2023)
- Prefixes in use
- 784
- How to dial
- Local calls need all 10 digits: 513-555-0142.
Find out who called you from a 513 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (513) number is on today, use our free carrier lookup.
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Cincinnati holds 64% of the phone prefixes in area code 513.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 784 prefixes in use shows where 513 numbers are actually given out.
- Cincinnati502 prefixes, 64%
- Hamilton55 prefixes, 7%
- Middletown38 prefixes, 5%
- Mason21 prefixes, 3%
- Lebanon18 prefixes, 2%
- Oxford13 prefixes, 2%
- Harrison8 prefixes, 1%
- Seven Mile8 prefixes, 1%
Also served: Newtonsville, Bethel, Williamsburg and Monroe and 7 smaller places.
Cincinnati Bell (altafiber) holds the most phone number prefixes in area code 513: 260 of 784.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 784 prefixes in use in 513 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Cincinnati Bell (altafiber)Landline company | 260 | 33% |
| T-MobileMobile network | 79 | 10% |
| AT&T MobilityMobile network | 55 | 7% |
| Level 3 (Lumen)Lumen's business and wholesale network | 55 | 7% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 19 | 2% |
| SpokPaging network | 17 | 2% |
| 35 other carriers | 299 | 38% |
58% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
513 has been split once and overlaid once since 1947.
1947
513 is one of the original North American area codes.
1996
On September 28, 1996, 937 splits off and takes part of the 513 area.
2023
On April 28, 2023, 283 is added on top of 513, so new numbers here can get either code.
A 513 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 513 are 937, 859 and 614.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
These are the questions people ask most about area code 513.
Where is area code 513?
513 covers Cincinnati, Hamilton, Middletown and Mason and 15 more places in Ohio. In the 513 area, phone numbers are given out most in Hamilton County, then Butler and Warren counties.
What state is area code 513 in?
Ohio. 513 is an Ohio area code on Eastern Time.
What cities use area code 513?
The places holding the most 513 prefixes are Cincinnati, Hamilton, Middletown, Mason, Lebanon, Oxford, Harrison and Seven Mile, out of 19 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 513?
No single phone company owns 513. NANPA's records show Cincinnati Bell (altafiber) holds the most 513 prefixes, 260 of 784, followed by T-Mobile and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 513 in?
513 is on Eastern Time.
When did area code 513 start?
513 is one of the original North American area codes, in service since 1947.
Is 513 the same area as 283?
Yes. 283 (since 2023) covers the same ground as 513. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 513 number?
Local calls need all 10 digits: 513-555-0142.
Is 513 a toll-free number?
No. 513 is a regular area code for Cincinnati and Hamilton in Ohio, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 513?
The closest are 937/326 (Dayton, Ohio), 859 (Lexington, Kentucky), 614/380 (Columbus, Ohio) and 502 (Louisville, Kentucky), measured between the centres of each area.
Who called me from a 513 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 513 a scam?
513 is a real Ohio area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.