Area code 571: Virginia
Area code 571 is a US state area code for Virginia, on Eastern Time. It has 627 prefixes in service across 19 rate centers, the largest being Washington Zone 8, Washington Zone 17 and Herndon. It shares its area with 703, so local numbers there can start with any of them. Local calls there take 10 digits.
Local time in area code 571
America/New_York
Prefixes in service
627 of 792 possible
19 rate centers
Area code 571 facts
| Location | Virginia, United States |
|---|---|
| Time zone | Eastern Time |
| Overlays | 703 |
| Overlay of | 703 |
| In service since | March 1, 2000 |
| Local calls | 10 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 571?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 571 rate centers with the most prefixes in service. 7 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Washington Zone 8 | 127 |
| Washington Zone 17 | 111 |
| Herndon | 73 |
| Washington Zone 19 | 67 |
| Leesburg | 46 |
| Manassas | 40 |
| Dale City | 29 |
| Engleside | 27 |
| Occoquan | 21 |
| Triangle | 15 |
| Braddock | 15 |
| Haymarket | 13 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 571 number?
NANPA's dialling plan for 571: local calls inside the code take 10 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 571 | 571-555-0147 |
|---|---|
| From another US or Canadian area code | 1-571-555-0147 |
| From outside North America | +1 571 555 0147 |
| E.164, for CRMs and SMS tools | +15715550147 |
When did area code 571 start?
Area code 571 went into service on March 1, 2000 as an overlay of 703. Today 571 and 703 cover the same area as an overlay, which is why 10-digit dialling is needed for local calls there.
Tools for 571 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 571 number tells you where it was issued, not what it is now.
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Area code 571 questions
- What state is area code 571?
- Area code 571 is in Virginia, United States. Its largest rate centers by number of prefixes are Washington Zone 8, Washington Zone 17, Herndon, Washington Zone 19 and Leesburg.
- What time zone is area code 571 in?
- Eastern Time.
- What area codes overlay 571?
- 703. An overlay adds a new code to the same area instead of splitting it, so neighbours can have different area codes and local calls need 10 digits.
- When did area code 571 start?
- Area code 571 went into service on March 1, 2000 as an overlay of 703.
- Is a 571 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 571 have?
- 627 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in Virginia
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.