Introduction
The 571 area code covers Northern Virginia, and some of its very first numbers went straight to federal government agencies just outside Washington, D.C.
If that three-digit prefix just showed up on your phone, this guide explains exactly who might be calling and why.
Virginia residents and business owners both rely on these digits daily, since this region burned through its numbering supply faster than almost anywhere else in the state.
In this guide, you will learn where this prefix reaches today, why federal agencies specifically requested it, and how to spot the scams that try to hide behind it.
Stick around, because the story behind these three digits explains a lot about how Northern Virginia keeps issuing new numbers.
- The 571 area code went into service on March 1, 2000, as an overlay sharing territory with area code 703.
- It covers Alexandria, Arlington, Fairfax, Falls Church, Manassas, and most of Loudoun and Prince William counties.
- Federal agencies like the US Patent and Trademark Office and TSA were among the first to receive 571 numbers.
- Understanding what area code is 571 helps residents and business owners recognize which calls are genuinely local.
Quick Facts About the 571 Area Code
The 571 area code identifies calls placed to or from Alexandria, Arlington, and the surrounding communities of Northern Virginia. It shares its entire footprint with the older area code 703, so a call from either code could easily be a neighbor.
Pairing that local identity with reliable VoIP service providers helps a small team sound like an established local player rather than an outsider cold-calling into the market.
Any business that wants to look and sound local in Northern Virginia typically starts with a matching local number.
A Number Trusted by Federal Agencies
The US Patent and Trademark Office, the Transportation Security Administration, and Fairfax County Public Schools were among the earliest organizations to receive 571 phone numbers. That kind of institutional adoption gave the new area code instant credibility just as it launched. A business dialing out from a 571 number today shares that same numbering plan with some of the federal government's own offices.
Where the 571 Area Code Actually Covers
The 571 area code covers Northern Virginia, including the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park.
Arlington anchors the region as one of its largest and most urban communities, home to roughly 238,000 residents based on the most recent census figures. The whole area sits inside the Eastern time zone, matching Washington, D.C. and Richmond.
Cities and Counties Sharing the 571 Area Code
- Alexandria and Arlington, anchoring the region closest to Washington, D.C.
- Fairfax and Falls Church, established suburban business hubs
- Manassas and Manassas Park, covering the region's western reach
- Loudoun and Prince William counties, stretching into the outer suburbs
A Region That Outgrew Its Own Split
Just five years before this overlay arrived, regulators had already split area code 540 away from 703 to relieve some of the pressure. That split barely made a dent, since 703 approached exhaustion again within only four years. Few regions anywhere have burned through a fresh numbering supply that quickly.
The History That Shaped the 571 Area Code
Area codes rarely appear out of nowhere, and this one is no exception. It exists today because Northern Virginia's population and business growth outpaced every previous attempt to keep the region supplied with numbers.
An Overlay Born From Explosive Growth
The 571 area code went into service on March 1, 2000, layered directly over the same Northern Virginia territory that area code 703 already served. According to Wikipedia's area code 571 entry, regulators pointed to the rapid rise of cell phones, fax machines, and pagers alongside the region's explosive growth as the reason a new overlay was needed. That combination of factors made Northern Virginia one of the fastest-growing numbering plan areas in the country at the time.
Ten-Digit Dialing Becomes Required
Adding this overlay meant every local call in the region needed all ten digits from that point forward, since two area codes now shared identical territory. Businesses and residents across Alexandria, Arlington, and Fairfax adjusted their printed materials and phone systems to reflect the change. That shift became standard practice for the entire Washington, D.C. metro area in the years that followed.
📞 Ready to sound like a true Northern Virginia business without opening a second office? A local number gets you dialing under this area code the same day you sign up. 👉 Start Your Free Teloz Trial · 👉 Get Your Local Number Today
How to Get a Business Phone Number from Teloz
Teloz gives businesses a cloud-based phone system that works entirely through a browser, so there is no bulky hardware to install or maintain.
A company can claim a number in this area code, route calls with a built-in AI receptionist, and manage texts and voice traffic from one connected dashboard.
Teloz is built for teams that want a real Northern Virginia presence without opening a physical office there.
- 1. Visit the website and start a free trial or request a live demo.
- 2. Create your account using your business email address.
- 3. Choose a plan that fits your team's size and expected call volume.
- 4. Select your business number and pick a 571 area code, a toll-free prefix, or a local number elsewhere.
- 5. Set up your team, call routing, and IVR menu right inside the browser dashboard.
- 6. Configure the AI receptionist, voicemail transcription, and SMS settings to match your workflow.
- 7. Start making and receiving calls immediately from the webphone or any connected device.
Making the Most of a 571 Business Number
Businesses that serve Alexandria, Arlington, or the surrounding communities gain something real by using a matching area code.
Local callers answer faster, trust faster, and refer their neighbors faster when the number on their screen looks familiar, especially once they recognize area code 571 on the display.
What area code is 571 signals to a customer here is simple: this business understands Northern Virginia and is reachable.
Local Numbers Versus Toll-Free Lines
A toll-free number still has its place for national brands, but it can work against a business trying to look rooted in one specific region. A 571 area code number tells a caller in Fairfax or Loudoun County that the company on the other end is part of their community, not a distant call center. For local service businesses especially, that distinction often decides whether the phone gets answered at all.
“This is not a random string of digits — it is the calling identity of Northern Virginia, one that federal agencies helped establish from the very start.”
Staying Alert to 571 Area Code Scams
The 571 area code itself is completely legitimate, used daily by real residents, federal agencies, and small businesses across Northern Virginia. Scammers know that, which is why they spoof 571 caller IDs to make fraudulent calls look local and trustworthy.
The area code on the screen never tells the full story; the behavior of the caller does.
Common Signs of a Scam Call
- Urgent demands to pay a bill immediately or face disconnection
- Requests for gift cards, wire transfers, or cryptocurrency payment
- Callers claiming to be law enforcement or a utility company demanding personal information
- One-ring calls designed to trigger a costly callback
Steps That Keep You Protected
Treat any unexpected call under area code 571 with the same caution you would use anywhere else. Hang up and dial the official number on a bill or website instead of trusting whatever shows up on caller ID, especially when the request involves money or personal details. Letting unfamiliar numbers go to voicemail costs nothing and blocks nearly every version of this scam before it starts, giving you time to verify who is actually calling.
Conclusion
The 571 area code is more than a random string of digits; it is the calling identity of Northern Virginia, from Alexandria's waterfront to the office parks of Fairfax County.
It has served the region since 2000, layered over an area code 703 that exhausted its numbers again just four years after its own split. Federal agencies were among the first to adopt the new prefix, giving it instant recognition across the D.C. metro area.
Understanding what area code is 571 helps residents and business owners alike make sense of who is really on the line.
Northern Virginia businesses that want to be taken seriously locally should treat their area code as more than an afterthought.
A matching 571 area code number signals roots in the community, while a smart platform behind it keeps every call, text, and voicemail organized in one place.
Claiming that number and building that trust is straightforward, from sign-up to your very first answered call.
Whether you are protecting yourself from a spoofed call or setting up a new business line, the next step in Northern Virginia starts with the right number.
📍 Want your business to be the trustworthy call Northern Virginia actually wants to answer?
A verified local number paired with call authentication keeps your caller ID clean. 👉 Start Your Free Trial · 👉 Claim Your 571 Number
