How do I become NIST 800-171 compliant?

Direct Answer

The first step to become NIST 800-171 compliant involves identifying which version of NIST 800-171 you have to comply with:

NIST 800-171 Rev 3 is the most current version; or
NIST 800-171 Rev 2 is still being used by the US DoD for CMMC certification.

If you are unsure on which version of NIST 800-171 you need to comply with, start by reviewing the contract or speaking with your procurement official. ComplianceForge has a very useful NIST 800-171 Rev 2 to Rev 3 Transition Guide that helps identify the specific NIST 800-171 controls that have changed between the versions.

Keep Exploring

Relevant ComplianceForge Resources

NIST 800-171 Compliance Program (NCP)
NIST SP 800-171 Rev. 3 compliance information
ComplianceForge NIST 800-171 & CMMC resources

References

Authoritative Sources

32 CFR Part 170 - CMMC Program
DoD CMMC program resources
NIST SP 800-171 Rev. 3
NIST SP 800-171A Rev. 3 assessment procedures