opencyc.org

Opencyc.org

OpenCyc is the open source version of the Cyc technology, the worlds largest and most complete general knowledge base and commonsense reasonging engine.

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Authority

48/100

Safety

85/100

Registered

Mar 5, 2001

25 years old · Amazon Registrar, Inc.

0 of 2 safety checks passed (Sep 9, 2026).

AboutUs has not vetted this site. 2 of 2 automated safety checks did not pass. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.

Current facts

What AboutUs observed on the live site and in WHOIS/DNS today. These are measurements, not an endorsement of the site.

checked now

Domain registered Mar 5, 2001 — 25 years old.

checked now

Registrar today: Amazon Registrar, Inc. — unchanged since AboutUs began tracking (Aug 31, 2026).

Trust record

Authority & Safety, with the evidence

How this is scored →

Authority 48/100 — ahead of 48% of scored sitesSome caution flags

Why this authority score

Prominence (Open PageRank 3.0/10)+6
Verified continuity: 25.5 years (RDAP registration)+11
Security & email hygiene+2
Calibration adjustment (published map)+7

Every point maps to a sentence. These lines sum to the model score of 26/99, which is what places this site at 48/100 against every other scored site.

Safety evidence

No valid HTTPS today

Site history

Dated record — historical facts always carry their date.

2001
Domain registered (Mar 5, 2001).
2026
Checked today — 0 of 2 safety checks passed (Sep 9, 2026).

✓ domain continuity 25 years registered✓ live verified Sep 9, 2026

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