Not in the official registry, but community data says it's throttled/unreachable from Russia (or it blocks Russia itself).
RKN registry: 1775944 domains, updated 03.11.2026 14:41 UTC · community list: 486, 03.11.2026 14:41 UTC. Source: antifilter.download (registry mirror).
Access to nsf.gov from Russia is restricted. Not in the official registry, but community data says it's throttled/unreachable from Russia (or it blocks Russia itself).
Possible reasons: an RKN registry block, throttling, the service itself blocking Russia, an outage, or your ISP. Compare our server check with the test from your browser.
RKN registry: 1775944 domains, updated 03.11.2026 14:41 UTC · community list: 486, 03.11.2026 14:41 UTC. Source: antifilter.download (registry mirror).