Introduction
The 703 area code covers Northern Virginia — Arlington, Alexandria, Fairfax County, and the Dulles Technology Corridor — one of the most economically significant technology and defense concentrations in the country. The Pentagon anchors Arlington, Amazon's HQ2 campus at National Landing has brought tens of thousands of employees to the region, and the Dulles corridor running to Loudoun County hosts more data center capacity than anywhere else on Earth, earning Northern Virginia the title of the world's data center capital.
Defense contractors, federal vendors, and the data center industry all read a 703 number as a mark of genuine Northern Virginia presence — credibility that carries real weight with procurement officers navigating a market this saturated with government-adjacent business.
- One of the 86 original area codes assigned when the NANP launched in 1947, originally covering the entire Commonwealth of Virginia
- Shares its entire footprint with the 571 overlay, added March 1, 2000 — 10-digit dialing is mandatory for every local call
- Covers Arlington, Alexandria, and Fairfax County, including McLean, Reston, Tysons Corner, and Ashburn's Data Center Alley
Where the 703 area code reaches
703 covers Northern Virginia — the Virginia side of the Washington, D.C., metro — spanning four major jurisdictions that together form one of the country's wealthiest regional economies.
- Arlington County — the Pentagon, Amazon HQ2 at National Landing, and Ronald Reagan Washington National Airport
- Alexandria — the independent city directly south of Washington with Old Town's historic waterfront district and a dense corporate services sector
- Fairfax County — the most populous county in Virginia, encompassing McLean, Reston, Herndon, Tysons, Vienna, Chantilly, and the Dulles technology corridor
- Falls Church and Fairfax City — two independent cities surrounded by Fairfax County with significant professional and government services economies
- Portions of Prince William County and Loudoun County — outer suburbs that include Manassas, Centreville, Ashburn, and Dulles International Airport
703 and 571 share this same map with no geographic distinction — anyone dialing either prefix reaches the same Northern Virginia footprint, and 10-digit dialing is mandatory for every local call. The entire footprint runs on Eastern Time (UTC-5 EST, UTC-4 EDT), sharing the clock with Washington, New York, and Atlanta — West Coast teams calling in are three hours behind, so an early Pacific morning call lands mid-day in Northern Virginia. More detail sits on our phone system for financial services page.
Arlington: the Pentagon, Amazon HQ2, and Reagan National
Arlington County packs more federal and corporate weight per square mile than almost any other jurisdiction in the country. Three major anchors define its economy and its role in the 703 market.
The Pentagon
The Pentagon, headquarters of the U.S. Department of Defense, sits on Arlington soil and employs more than 23,000 military and civilian staff — the world's largest office building by floor area, feeding a dense ecosystem of government contractors and cleared technology firms across the broader 703 footprint.
Amazon HQ2 and Reagan National Airport
Amazon's second headquarters at National Landing in Arlington opened its first phase in 2023, bringing thousands of high-paying technology jobs into the 703 zone and accelerating the tech leasing market across the corridor. Reagan National Airport (DCA), just south along the Potomac, connects Northern Virginia executives and federal workers to every major U.S. hub, keeping the NoVA professional market tightly networked.
Arlington National Cemetery, established in 1864 on the former estate of Robert E. Lee's family, spans 639 acres and holds more than 400,000 graves, conducting roughly 27 to 30 funerals on a typical weekday. Its Tomb of the Unknown Soldier, opened to the public in 1932, has been continuously guarded by the 3rd U.S. Infantry Regiment — "The Old Guard" — since 1948. The cemetery draws millions of visitors a year into the 703 footprint, adding a steady stream of tourism and ceremonial-services activity to an Arlington economy otherwise dominated by defense and tech. More detail sits on our letsdial page.
McLean to Ashburn: the finance, defense, and tech corridor
West of Arlington, the 703 map runs through one of the region's densest suburban corridors — finance, intelligence, defense contracting, and hyperscale cloud infrastructure cluster from McLean and Tysons out through the Dulles technology corridor to Ashburn.
Capital One and Freddie Mac
Capital One Financial is headquartered in McLean, ranking among the ten largest U.S. banks. Freddie Mac, the government-sponsored mortgage enterprise, also keeps its headquarters in McLean, having added a large second building in nearby Tysons in 2019. Together they anchor a financial services sector of hundreds of vendor and technology firms along the Beltway.
Tysons itself is Fairfax County's central business district and, with roughly 28 million square feet of office space, the seventh-largest office submarket in the entire country and the second-largest suburban office market in the US. Beyond Capital One and Freddie Mac, Tysons also hosts the corporate headquarters of Booz Allen Hamilton, Hilton, SAIC, and USA Today. Since 2008, Fairfax County has pursued a 40-year plan to urbanize Tysons around four Silver Line Metro stops, aiming to house 100,000 residents and 200,000 employees by 2050 — a transformation from office park to genuine downtown that is reshaping how much of the 703 corridor west of Arlington actually functions day to day.
Defense contracting and the intelligence community
Booz Allen Hamilton, Leidos, SAIC, and CACI all maintain major offices in the 703 zone. The CIA's headquarters at Langley sits in unincorporated McLean, supporting one of the highest concentrations of security-clearance holders in the country.
Reston and Herndon
Reston Town Center is one of the most active mixed-use tech campuses on the East Coast — Microsoft, Google, and dozens of cybersecurity and cloud firms operate here. Herndon neighbors Reston to the west and houses additional defense IT contractors and Dulles Airport's corporate park.
Ashburn: Data Center Alley
Loudoun County's Ashburn corridor hosts the highest concentration of data centers on Earth — over 100 facilities processing an estimated 70 percent of global internet traffic daily, with AWS, Microsoft Azure, Google Cloud, and virtually every hyperscaler maintaining infrastructure here.
703 since 1947: Virginia's original NANP code
703 is one of the 86 original area codes assigned when AT&T launched the North American Numbering Plan in 1947, when a single code covered the entire state of Virginia — from the D.C. suburbs through the Shenandoah Valley to the Tidewater coast.
The 540 split and the 571 overlay
As Northern Virginia's growth far outpaced the rest of the state, regulators divided the territory: 540 split off on June 19, 1995 to cover western and central Virginia, leaving 703 concentrated in the D.C. suburbs. The remaining pool filled so quickly that 571 was added as a full overlay on March 1, 2000, making 10-digit dialing mandatory from that date forward.
Getting a 703 number and building call trust
In a market where the area code itself signals credibility — procurement officers and financial firms read a 703 prefix as locally authoritative — a fast path to a verified number matters as much as the number itself.
- Cloud phone platform — search live 703 and 571 inventory and activate a line in minutes with letsdial, on a free trial, no credit card required.
- Port an existing number — already on another carrier? letsdial ports it in without downtime, at no charge.
- Wireless or landline carrier — valid for a physical handset, but slower to activate and difficult to scale without purchasing additional hardware per seat.
STIR/SHAKEN for a government-adjacent market
Northern Virginia has an unusually sophisticated call-screening culture — federal employees and cleared contractors dismiss anything flagged Spam Risk or Unknown without a second thought. Apply STIR/SHAKEN A-level attestation so every outbound 703 call arrives signed with your registered business name, and register text traffic for 10DLC compliance from day one — an unattested number is a liability before the call is even answered.
> [TIP] Note: letsdial applies STIR/SHAKEN attestation automatically and files your 10DLC registration for text messaging — your 703 number is fully protected from the first call, no extra configuration required.
Northern Virginia's finance sector, anchored by Capital One and Freddie Mac, is well served by a phone system for financial services built for compliance and call recording. 703 is officially documented under the North American Numbering Plan, which governs area code assignments across the US, Canada, and the Caribbean. That record is published in full as 703.
Conclusion
The 703 area code anchors Northern Virginia's extraordinary concentration of defense, government, and technology operations — the Pentagon, Amazon HQ2, and the world's largest data center market all operate from this footprint, making 703 one of the most commercially valuable tech-and-government phone identities in the country.
letsdial provisions 703 numbers in minutes on a free trial with full STIR/SHAKEN attestation. Activate a Northern Virginia number today and establish the local identity that resonates with defense contractors, federal agencies, and the technology companies that have made the Dulles corridor a global hub for cloud infrastructure.
Frequently Asked Questions
Written by Aryan Khan · June 20, 2026
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