Area code
573
573 is a United States area code. Under the North American Numbering Plan it belongs to Missouri, which has 9 area codes in total.
Validate a number in 573
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 573 at a glance
NANPA lists 786 central office codes (prefixes) in use in area code 573, held by 49 holders across 216 rate centers.
| Fact | Value |
|---|---|
| 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 in area code 573
| 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% |
Who holds the prefixes in 573
Southwestern Bell holds the most prefixes, 128 (16%). 88% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| 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. Find which carrier a number is on, or browse the prefix holders.
History of area code 573
- 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.
Area codes nearest to 573
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
- 636 about 50 mi
- 314 about 64 mi
- 557 about 64 mi
- 730 about 106 mi
- 618 about 113 mi
Overlay codes in the same area
ZIP codes in area code 573
168 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Columbia, MO | 10 |
| Rolla, MO | 3 |
| Advance, MO | 1 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 573 numbers
1,539 FCC complaints are on file for 1,260 numbers in 573, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 84 |
| 2024 | 99 |
| 2025 | 103 |
Other area codes in Missouri
Missouri is one state with 9 area codes in the NANPA table. 573 is one of them.
Next to 573 in the numbering table
These are the codes just before and after 573 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 573 was first assigned in Missouri. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Missouri next to a 573 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 573
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.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.