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Important Notice No. 139

National Science Foundation Headquarters Moving to Alexandria, Virginia

Important Notice to Presidents of Universities and Colleges and Heads of Other National Science Foundation Grantee Organizations

May 22, 2017

The National Science Foundation (NSF) is moving its headquarters to Alexandria, Virginia. NSF will have a new mailing address effective Monday, October 2, 2017, as follows:

National Science Foundation
2415 Eisenhower Avenue
Alexandria, VA 22314

Email addresses and phone numbers for NSF employees and NSF offices will not change. NSF plans to minimize the move’s impact on the research community as much as possible. There are a few important impacts listed below:

  • Due to the move of NSF's Data Center,, FastLane and will be unavailable from Friday, June 30 at 8:00 PM until Tuesday, July 4 at 6:00 PM EDT. This move has been scheduled around a holiday weekend to minimize downtime and reduce the impact on the research community and NSF staff. During this outage period, proposals cannot be submitted in FastLane, and project reports and cash requests cannot be submitted in However, previously saved information and uploaded documents in FastLane and, including in-process proposals and reports, will be accessible after the Data Center moves.

  • The physical move to NSF's new headquarters will be phased over a six-week period, beginning Thursday, August 24 through Sunday, October 1. During this time, you may experience delayed response times when trying to communicate with NSF employees who will be in the midst of this move.

I encourage you to share this information with your colleagues. For IT system-related questions, please contact the NSF Help Desk at 1 (800) 381-1532, or via email at Policy-related questions should be directed to

We appreciate your understanding as we transition to our new building.

France A. Córdova