---
title: "Area code 573: Missouri, United States"
url: "https://lookvalid.com/area-code/573.md"
canonical_url: "https://lookvalid.com/area-code/573"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 573 serves Missouri, United States. Number formats, numbering rules, a live phone validator and the other codes in Missouri."
---

# Area code 573: Missouri, United States

Area code 573 serves Missouri, United States. Number formats, numbering rules, a live phone validator and the other codes in Missouri.

NANPA lists 786 central office codes (prefixes) in use in area code 573, held by 49 holders across 216 rate centers.
Southwestern Bell holds the most prefixes, 128 (16%). 88% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 1,539 complaints on file for 1,260 numbers in 573, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1996-01-07
- Time zone: Central (C)
- Assigned overlays: 235 (2024-03-24)
- Prefixes in use: 786
- Pooled prefixes: 689 (88%)
- Rate centers: 216
- Companies holding prefixes: 49
- Assignment dates on file: 2001-01-10 to 2025-09-05 (291 prefixes)
- ZIP codes in its places: 168

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| COLUMBIA | 59 | 8% |
| JEFFERSNCY | 39 | 5% |
| CAPEGIRARD | 34 | 4% |
| FARMINGTON | 16 | 2% |
| POPLAR BLF | 16 | 2% |
| LKOZKOSBCH | 15 | 2% |
| ROLLA | 15 | 2% |
| BIRCH TREE | 13 | 2% |
| 208 other rate centers | 579 | 74% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Southwestern Bell | 128 | 16% |
| New Cingular Wireless PCS | 113 | 14% |
| Onvoy | 86 | 11% |
| Level 3 Communications | 64 | 8% |
| T-Mobile USA | 44 | 6% |
| Brightspeed Of Missouri | 42 | 5% |
| 43 other carriers | 309 | 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 314, named as the parent of 573 in the NANPA report, was in service.
- 1996-01-07: Area code 573 went into service.
- 2024-03-24: Area code 235 went into service as an overlay in the same area as 573.

## Nearest area codes

The area codes closest to 573, measured between the centers of the ZIP code places they serve, are 636 (about 50 miles), 314 (about 64 miles), 557 (about 64 miles), 730 (about 106 miles) and 618 (about 113 miles).

## ZIP codes

168 ZIP codes fall in places that have a rate center in this area code. The places with the most are Columbia, MO (10 ZIP codes), Rolla, MO (3 ZIP codes) and Advance, MO (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

1,539 complaints for 1,260 numbers. Numbers whose latest complaint falls in each year:

- 2023: 84
- 2024: 99
- 2025: 103

## Questions

### Where is area code 573?

NANPA assigns area code 573 to Missouri, United States.

### In which state does area code 573 sit?

Missouri. 573 is one of 9 area codes the NANPA table assigns to the state.

### Which places does area code 573 cover?

The places with the most ZIP codes among the rate centers in 573 are Columbia, MO, Rolla, MO and Advance, MO. The rate center list on this page shows all of them.

### Who owns area code 573?

NANPA assigns area codes. Within 573, Southwestern Bell holds the most prefixes, 128 prefixes or 16%.

### Which time zone does 573 use?

The NANPA NPA report lists the time zone for 573 as Central (C).

### What year did 573 enter service?

The NANPA NPA report gives an in-service date of 1996-01-07, so 573 has been in use since 1996.

### Does area code 573 have an overlay?

Yes. 235 (in service 2024-03-24) shares the same area with 573, so numbers from all of them are local to each other.

### Which area codes are nearest to 573?

The area codes closest to 573, measured between the centers of the ZIP code places they serve, are 636 (about 50 miles), 314 (about 64 miles), 557 (about 64 miles), 730 (about 106 miles) and 618 (about 113 miles).

### How many prefixes does area code 573 have?

NANPA's report dated 2026-10-17 lists 786 prefixes in service in 573, spread over 216 rate centers and 49 holders.

### Are there complaints about 573 numbers?

The FCC data on file has 1,539 complaints for 1,260 numbers in 573. 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).