Area code
571
571 is a United States area code. Under the North American Numbering Plan it belongs to Virginia, which has 10 area codes in total.
Validate a number in 571
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.
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Area code 571 at a glance
NANPA lists 627 central office codes (prefixes) in use in area code 571, held by 38 holders across 19 rate centers.
| Fact | Value |
|---|---|
| In service since | 2000-03-01 |
| Time zone | Eastern (E) |
| Assigned overlays | 703 (1947-01-01) |
| Prefixes in use | 627 |
| Pooled prefixes | 599 (96%) |
| Rate centers | 19 |
| Companies holding prefixes | 38 |
| Assignment dates on file | 2001-01-17 to 2026-08-06 (564 prefixes) |
| ZIP codes in its places | 28 |
Rate centers in area code 571
| Rate center | Prefixes | Share |
|---|---|---|
| WSNGTNZN08 | 127 | 20% |
| WSNGTNZN17 | 111 | 18% |
| HERNDON | 73 | 12% |
| WSNGTNZN19 | 67 | 11% |
| LEESBURG | 46 | 7% |
| MANASSAS | 40 | 6% |
| DALE CITY | 29 | 5% |
| ENGLESIDE | 27 | 4% |
| 11 other rate centers | 107 | 17% |
Who holds the prefixes in 571
Omnipoint Communications Cap Operations holds the most prefixes, 100 (16%). 96% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Omnipoint Communications Cap Operations | 100 | 16% |
| New Cingular Wireless PCS | 88 | 14% |
| Verizon Wireless | 74 | 12% |
| Onvoy | 61 | 10% |
| Mcimetro Access Transmission Services | 40 | 6% |
| Verizon Virginia | 32 | 5% |
| 32 other carriers | 232 | 37% |
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 571
- 1947-01-01 Area code 703, named as the parent of 571 in the NANPA report, was in service.
- 2000-03-01 Area code 571 went into service.
Area codes nearest to 571
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
ZIP codes in area code 571
28 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Manassas, VA | 6 |
| Dulles, VA | 5 |
| Herndon, VA | 5 |
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 571 numbers
3,461 FCC complaints are on file for 2,614 numbers in 571, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 142 |
| 2024 | 526 |
| 2025 | 226 |
Other area codes in Virginia
Virginia is one state with 10 area codes in the NANPA table. 571 is one of them.
Next to 571 in the numbering table
These are the codes just before and after 571 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 571 was first assigned in Virginia. 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 Virginia next to a 571 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 571
Where is area code 571?
NANPA assigns area code 571 to Virginia, United States.
In which state does area code 571 sit?
Virginia. 571 is one of 10 area codes the NANPA table assigns to the state.
Which places does area code 571 cover?
The places with the most ZIP codes among the rate centers in 571 are Manassas, VA, Dulles, VA and Herndon, VA. The rate center list on this page shows all of them.
Who owns area code 571?
NANPA assigns area codes. Within 571, Omnipoint Communications Cap Operations holds the most prefixes, 100 prefixes or 16%.
Which time zone does 571 use?
The NANPA NPA report lists the time zone for 571 as Eastern (E).
What year did 571 enter service?
The NANPA NPA report gives an in-service date of 2000-03-01, so 571 has been in use since 2000.
Does area code 571 have an overlay?
Yes. 703 (in service 1947-01-01) shares the same area with 571, so numbers from all of them are local to each other.
Which area codes are nearest to 571?
The area codes closest to 571, measured between the centers of the ZIP code places they serve, are 301 (about 33 miles), 240 (about 36 miles), 227 (about 38 miles), 443 (about 59 miles) and 410 (about 61 miles).
How many prefixes does area code 571 have?
NANPA's report dated 2026-10-17 lists 627 prefixes in service in 571, spread over 19 rate centers and 38 holders.
Are there complaints about 571 numbers?
The FCC data on file has 3,461 complaints for 2,614 numbers in 571. 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.