AppNexus headquarters details
- Street address
- 28 West 23rd Street 4th Floor
- City
- New York City
- State / region
- New York
- ZIP / postal code
- 10010-5260
- Country
- United States
- Phone
- +1 646 825 6460
- Founded
- 2007
- Website
- appnexus.com
- linkedin.com/company/appnexus
Location map
Open in Google MapsAll AppNexus office locations
| City | State / region | Country | Type |
|---|---|---|---|
| New York City HQ | New York | United States | Headquarters |
Showing the headquarters of 19 recorded locations. See every location in GraphIQ →
About AppNexus
AppNexus is headquartered in New York City, New York, United States. Founded in 2007, the company has 19 recorded locations across 10+ countries and employs approximately 1,000 people worldwide.
Where is AppNexus's main office?
AppNexus's main headquarters office is located at 28 West 23rd Street 4th Floor, New York City, New York 10010-5260, United States. This is the company's primary corporate address.
AppNexus regional offices
Beyond its headquarters in New York City, AppNexus has recorded locations in United States, Australia, Brazil, France, Germany, Japan, Mexico, Norway and 2 other countries.
AppNexus contact information
The main switchboard for AppNexus headquarters can be reached at +1 646 825 6460. Official website: appnexus.com.
What does AppNexus do?
AppNexus is an American multinational technology company operating a cloud-based software platform that enables and optimizes programmatic online advertising. Headquartered in the Flatiron District of New York City, the company has 23 offices in North America, Latin America, Europe, Asia and Australia.
AppNexus competitors & similar companies
Frequently asked questions
Where is AppNexus headquarters?
AppNexus's headquarters is located at 28 West 23rd Street 4th Floor, New York City, New York 10010-5260, United States.
How many offices does AppNexus have?
GraphIQ records 19 locations for AppNexus across 10+ countries, as of October 2026.
What is AppNexus's corporate address?
The corporate headquarters address is 28 West 23rd Street 4th Floor, New York City, New York 10010-5260, United States.
When was AppNexus founded?
AppNexus was founded in 2007 and employs approximately 1,000 people.
What is AppNexus's phone number?
The main phone number for AppNexus headquarters is +1 646 825 6460.
How many employees does AppNexus have?
AppNexus has approximately 1,000 employees (GraphIQ estimate, 2026).