---
title: "Area code 513: Ohio, United States"
url: "https://lookvalid.com/area-code/513.md"
canonical_url: "https://lookvalid.com/area-code/513"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 513 serves Ohio, United States. Number formats, numbering rules, a live phone validator and the other codes in Ohio."
---

# Area code 513: Ohio, United States

Area code 513 serves Ohio, United States. Number formats, numbering rules, a live phone validator and the other codes in Ohio.

NANPA lists 784 central office codes (prefixes) in use in area code 513, held by 44 holders across 25 rate centers.
The largest rate center is CINCINNATI, with 502 prefixes (64%).
Cincinnati Bell holds the most prefixes, 251 (32%). 58% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 4,228 complaints on file for 3,061 numbers in 513, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1947-01-01
- Time zone: Eastern (E)
- Assigned overlays: 283 (2023-04-28)
- Prefixes in use: 784
- Pooled prefixes: 454 (58%)
- Rate centers: 25
- Companies holding prefixes: 44
- Assignment dates on file: 2001-03-06 to 2024-02-02 (250 prefixes)
- ZIP codes in its places: 88

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| CINCINNATI | 502 | 64% |
| HAMILTON | 55 | 7% |
| MIDDLETOWN | 38 | 5% |
| LTL MIAMI | 32 | 4% |
| MASON | 21 | 3% |
| CLERMONT | 20 | 3% |
| LEBANON | 18 | 2% |
| BETHANY | 14 | 2% |
| 17 other rate centers | 84 | 11% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Cincinnati Bell | 251 | 32% |
| Verizon Wireless | 125 | 16% |
| T-Mobile USA | 79 | 10% |
| New Cingular Wireless PCS | 55 | 7% |
| Level 3 Communications | 39 | 5% |
| Onvoy | 36 | 5% |
| 38 other carriers | 199 | 25% |

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

- 1947-01-01: Area code 513 went into service.
- 1996-09-28: Area code 937 went into service and names 513 as its parent.
- 2023-04-28: Area code 283 went into service as an overlay in the same area as 513.

## Nearest area codes

The area codes closest to 513, measured between the centers of the ZIP code places they serve, are 326 (about 43 miles), 937 (about 44 miles), 859 (about 76 miles), 502 (about 87 miles) and 380 (about 96 miles).

## ZIP codes

88 ZIP codes fall in places that have a rate center in this area code. The places with the most are Cincinnati, OH (71 ZIP codes), Hamilton, OH (4 ZIP codes) and Middletown, OH (2 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

4,228 complaints for 3,061 numbers. Numbers whose latest complaint falls in each year:

- 2023: 168
- 2024: 165
- 2025: 159

## Questions

### Where is area code 513?

NANPA assigns area code 513 to Ohio, United States.

### In which state does area code 513 sit?

Ohio. 513 is one of 15 area codes the NANPA table assigns to the state.

### Which places does area code 513 cover?

The places with the most ZIP codes among the rate centers in 513 are Cincinnati, OH, Hamilton, OH and Middletown, OH. The rate center list on this page shows all of them.

### Who owns area code 513?

NANPA assigns area codes. Within 513, Cincinnati Bell holds the most prefixes, 251 prefixes or 32%.

### Which time zone does 513 use?

The NANPA NPA report lists the time zone for 513 as Eastern (E).

### What year did 513 enter service?

The NANPA NPA report gives an in-service date of 1947-01-01, so 513 has been in use since 1947.

### Does area code 513 have an overlay?

Yes. 283 (in service 2023-04-28) shares the same area with 513, so numbers from all of them are local to each other.

### Which area codes are nearest to 513?

The area codes closest to 513, measured between the centers of the ZIP code places they serve, are 326 (about 43 miles), 937 (about 44 miles), 859 (about 76 miles), 502 (about 87 miles) and 380 (about 96 miles).

### How many prefixes does area code 513 have?

NANPA's report dated 2026-10-17 lists 784 prefixes in service in 513, spread over 25 rate centers and 44 holders.

### Are there complaints about 513 numbers?

The FCC data on file has 4,228 complaints for 3,061 numbers in 513. 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).