---
title: "Area code 618: Illinois, United States"
url: "https://lookvalid.com/area-code/618.md"
canonical_url: "https://lookvalid.com/area-code/618"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 618 serves Illinois, United States. Number formats, numbering rules, a live phone validator and the other codes in Illinois."
---

# Area code 618: Illinois, United States

Area code 618 serves Illinois, United States. Number formats, numbering rules, a live phone validator and the other codes in Illinois.

NANPA lists 786 central office codes (prefixes) in use in area code 618, held by 54 holders across 242 rate centers.
Frontier North holds the most prefixes, 126 (16%). 77% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 2,135 complaints on file for 1,711 numbers in 618, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1947-01-01
- Time zone: Central (C)
- Assigned overlays: 730 (2023-07-07)
- Prefixes in use: 786
- Pooled prefixes: 608 (77%)
- Rate centers: 242
- Companies holding prefixes: 54
- Assignment dates on file: 2001-01-04 to 2025-06-18 (294 prefixes)
- ZIP codes in its places: 184

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| COLLINSVL | 88 | 11% |
| CARBONDALE | 33 | 4% |
| BELLEVILLE | 31 | 4% |
| CENTRALIA | 24 | 3% |
| GRANITE CY | 22 | 3% |
| OLNEY | 16 | 2% |
| ALTON | 15 | 2% |
| MARION | 15 | 2% |
| 234 other rate centers | 542 | 69% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Frontier North | 126 | 16% |
| Illinois Bell Tel | 111 | 14% |
| New Cingular Wireless PCS | 98 | 12% |
| Verizon Wireless | 62 | 8% |
| Level 3 Communications | 46 | 6% |
| T-Mobile USA | 40 | 5% |
| 48 other carriers | 303 | 39% |

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 618 went into service.
- 2023-07-07: Area code 730 went into service as an overlay in the same area as 618.

## Nearest area codes

The area codes closest to 618, measured between the centers of the ZIP code places they serve, are 314 (about 65 miles), 557 (about 65 miles), 636 (about 92 miles), 217 (about 104 miles) and 447 (about 112 miles).

## ZIP codes

184 ZIP codes fall in places that have a rate center in this area code. The places with the most are Belleville, IL (5 ZIP codes), Carbondale, IL (3 ZIP codes) and Addieville, IL (1 ZIP code). 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

2,135 complaints for 1,711 numbers. Numbers whose latest complaint falls in each year:

- 2023: 138
- 2024: 115
- 2025: 78

## Questions

### Where is area code 618?

NANPA assigns area code 618 to Illinois, United States.

### In which state does area code 618 sit?

Illinois. 618 is one of 17 area codes the NANPA table assigns to the state.

### Which places does area code 618 cover?

The places with the most ZIP codes among the rate centers in 618 are Belleville, IL, Carbondale, IL and Addieville, IL. The rate center list on this page shows all of them.

### Who owns area code 618?

NANPA assigns area codes. Within 618, Frontier North holds the most prefixes, 126 prefixes or 16%.

### Which time zone does 618 use?

The NANPA NPA report lists the time zone for 618 as Central (C).

### What year did 618 enter service?

The NANPA NPA report gives an in-service date of 1947-01-01, so 618 has been in use since 1947.

### Does area code 618 have an overlay?

Yes. 730 (in service 2023-07-07) shares the same area with 618, so numbers from all of them are local to each other.

### Which area codes are nearest to 618?

The area codes closest to 618, measured between the centers of the ZIP code places they serve, are 314 (about 65 miles), 557 (about 65 miles), 636 (about 92 miles), 217 (about 104 miles) and 447 (about 112 miles).

### How many prefixes does area code 618 have?

NANPA's report dated 2026-10-17 lists 786 prefixes in service in 618, spread over 242 rate centers and 54 holders.

### Are there complaints about 618 numbers?

The FCC data on file has 2,135 complaints for 1,711 numbers in 618. 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).