Area Code Lookup
What Area Code Is Herndon?
2 area codes serve Herndon · Virginia
Herndon is served by area codes 571, 703. It is located in Virginia.
Area Codes Serving Herndon
Frequently Asked Questions
What area code is Herndon?
Herndon is served by area codes 571, 703. It is located in Virginia.
Why does Herndon have multiple area codes?
As demand for phone numbers increased, NANPA added area codes through splits (dividing the region) or overlays (layering a new code over the same geography). Herndon now has 2 area codes — 571 and 703 — covering the same or overlapping areas.
How do I call Herndon from outside the US?
To call Herndon from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-571-XXX-XXXX). The +1 is the country code for all NANPA countries.