Please see the update below from the NSF
Dear Colleague:
Effective February 28, 2022, the National Science Foundation (NSF) will begin using the new System for Award Management (SAM) issued Unique Entity Identifier (UEI) in Research.gov and FastLane. This update is being made in accordance with the government-wide transition by April 4, 2022, away from the use of the Dun & Bradstreet issued Data Universal Numbering System (DUNS) number and toward the new SAM UEI as the primary means of entity...
Read more about Implementation of the New SAM UEI to Replace DUNS in NSF Systems
