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571 Area Code: Location, Cities, Map & Phone Lookup Guide

Gary Hernandez

February 14, 2026
5 min read

571 Area Code: Location, Cities, Map & Phone Lookup Guide

In short: the 571 area code is a valid telephone area code serving Northern Virginia as an overlay with 703. It covers places like Arlington, Alexandria, Fairfax, and Leesburg. It’s not a scam—just routinely used for both landlines and mobile phones. Here’s a clear, human-style breakdown of all you need to know.

What & Where: Understanding Area Code 571

Introduction / Quick Answer
571 is an honest-to-goodness telephone area code for Northern Virginia. Since its activation on March 1, 2000, it’s been used alongside 703 to serve a rapidly growing region that includes Arlington, Alexandria, Fairfax, Manassas, and parts of Loudoun and Prince William counties . It’s not a scam—just one of several overlays helping manage phone number demand in a booming metro area.

A Bit of History

Originally, Northern Virginia was all under area code 703 from 1947 .
Rapid population and telecom growth forced a split in 1995, creating area code 540 for western parts .
In 2000, 571 was overlaid atop 703 to expand numbering capacity without renumbering existing users .

Service Area: Cities & Counties Covered

Major Cities & Towns

The 571 area code covers a swath of vibrant Northern Virginia communities, including:
Arlington, Alexandria, Fairfax, Falls Church, Reston, Ashburn, Leesburg, Manassas, Centreville, Dale City, Burke, McLean, Vienna, and more .

Counties at a Glance

This overlay spans key counties and jurisdictions:
– Arlington County
– Fairfax County
– Loudoun County
– Prince William County
– Cities: Alexandria, Falls Church, Manassas, Manassas Park .

Population Insight

Combined, area codes 571 and 703 serve over 2.5 million people . This includes hefty concentrations in Arlington (~239k residents) and Alexandria (~159k) .

Overlay Dynamics & Dialing Rules

Because 703 and 571 overlay the same region, 10-digit dialing is mandatory—even for local calls . If you’re calling within the same overlay area, no need for the “1” prefix unless it’s a landline long-distance call .

Time Zone & Geography

Time Zone

Area code 571 lies firmly in the Eastern Time Zone, aligned with Washington D.C. . It observes daylight saving time, shifting between UTC-5 (standard) and UTC-4 (summer) .

Map Reference

Visually, the 571/703 overlay covers the northern tip of Virginia, hugging the D.C. metro area . A recent boundary map offers precise guidance .

Prefixes & Phone Number Distribution

Prefix Assignments

Active prefixes range from 571-200 through 571-999, with carriers like Verizon, Onvoy, and Omnipoint issuing them . Prefixes such as 571-202, 571-203, and 571-204 are mainly tied to Herndon and Washington zones .

Landline vs. Wireless

Latest data shows:
– Active prefixes: ~550
– Landlines: ~52%
– Wireless: ~48%
– Inactive: ~31% .

This suggests a balanced distribution between mobile systems and traditional phone lines.

Scam Awareness: 571 Is Not to Blame

Legitimate vs. Spoofed

The 571 area code is legitimate. But scammers often spoof it to look local and trick people into answering . That doesn’t mean the code itself is sketchy—just misused.

Common Scams

Scammers have been known to impersonate:
– Realtors
– Debt collectors
– SSN suspension notices
– Medicare or tech warranty alerts .

One Reddit user even recounted a spoofed “Loudoun County Sheriff’s Office” call from a 571 number—classic scam tactics .

Blocking Tips

Don’t block entire area codes—you’ll miss legit contacts.
Register your number with the Do Not Call list.
Use carrier or third-party call-blocking tools to filter scams effectively .

Why 571 Matters: Growth & Demand

Population & Tech Surge

The surge in cellphones, fax machines, and data lines in the late 1990s sparked the need for new numbers in Northern Virginia. Hence, 571 was introduced to ease the strain on 703 .

Continued Use

Even now, 571 remains vital. People still get familiar with 703, but new numbers—especially mobile—often come with 571 .

Stability Signal

With no current sign of number exhaustion, there’s no immediate plan for another overlay. Existing overlays like 826 exist for other parts of Virginia but not for 571/703 area .

Quick Look: All-in-One Summary

In Closing

So yeah, 571 is a real, working area code—not some shady phony. It just exists because Northern Virginia grew and needed more numbers. It covers bustling suburbs and cities around D.C. Today it’s both landline and mobile, and dialing has adapted to fit its overlay nature. Remain alert to how scammers may abuse it, but don’t write off the code itself—just be smart about answering.

FAQs

What exactly is area code 571?

It’s a valid telephone area code overlaid on 703 since March 1, 2000, used across Northern Virginia, including Arlington, Alexandria, Fairfax, and surrounding areas.

Which cities and counties fall under 571?

It spans Arlington, Fairfax, Loudoun, and Prince William counties, and cities like Alexandria, Falls Church, Manassas, Reston, Leesburg, and Centreville.

Do I still need to dial with the area code?

Yes—because of the 703/571 overlay, you must use full 10-digit dialing even for local calls.

Is the 571 area code frequently used for scams?

The code itself is valid. However, scammers often spoof 571 numbers to appear local. Using call-blocking tools can help reduce nuisance calls.

How split is phone number usage in this area code?

Recent data indicates roughly 52% landline and 48% wireless numbers among active prefixes in the 571 region.

Will there be another area code added to this region soon?

There’s no current plan for a new overlay in the 571/703 region. The area appears stable for now.