Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Procedures for Visitor and Non-User Access
Purpose of Visit | To get access, you MUST register each time | Deadline |
|---|---|---|
| Non-User Visit (examples: tour, talk, seminar, etc.) | Click here to access our visitor registration page and fill out the request form. | Three full business days in advance is needed. |
| All other requests | Contact our User Office at ncnraccess [at] nist.gov (ncnraccess[at]nist[dot]gov) or (301) 975-8200. |
Created July 24, 2026, Updated July 30, 2026