AboutUsThe independent trust record for every website

UnclaimedSource: not yet crawled

AboutUs hasn't finished checking this site yet — the live checks below are current; more details appear as we crawl it.

codeforces.com

Registered 2009 · AboutUs's live check was blocked by the site's bot protection

codeforces.com has an AboutUs profile for public website intelligence, ownership context, trust signals, monitoring, and owner verification.

AboutUs Site Facts

Independent record by AboutUs · not written by codeforces.com

codeforces.com

aboutus.com/codeforces.comScores refreshed Sep 30, 2026Not an official or audited rating

SignalMeasured

Authority

Link-graph prominence, 0–99

Safety

No known risk flags

Known risk signals, not a check pass rate

Registered: Apr 10, 200917 years old · RDAP fetched Sep 19, 2026
Registrar: Gandi SAS

Measurements, not a verdict about the site. Authority scores draw on Open PageRank link-graph data.

How this is scored

Full report Claim profile Suggest official facts Visit website Claiming, verifying, and correcting is always free.

The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Oct 5, 2026).

On record since 2009 — see history

DNS

AboutUs has not vetted this site. 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

Latest available measurements; dated entries retain their dates. These are measurements, not an endorsement of the site.

Authority & Safety, with the evidence

How this is scored →

Authority 78/100 — ahead of 78% of the August 2026 scored sampleClear

Why this authority score

78 is a percentile: higher than 78% of sites we score.

How it's calculated

Prominence (Tranco rank #5,280)+8
Verified continuity: 17.5 years (RDAP registration)+10
Security & email hygiene+5
Calibration adjustment (published map)+17

Model score: 40/99 — what these reason lines add up to.

Published Authority (percentile): 78/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.

Safety evidence

No unexpired threat-feed result; name-similarity check available (recorded about 5 days ago); 3/3 transport and email checks available (oldest recorded about 5 days ago). This is evidence coverage, not a probability that a website is safe.

No caution flags in the available scoring observations; this is not a complete safety assessment

Site history

Dated record — historical facts always carry their date.

2009
Domain registered (Apr 10, 2009).
2012
First tracked by AboutUs (Mar 4, 2012).
2026
Checked today — The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Oct 5, 2026).

✓ domain continuity 17 years registered– live check blocked the site's bot protection turned the check away Oct 5, 2026

Common questions

Is codeforces.com legit or a scam?

codeforces.com was registered Apr 10, 2009 (17 years old), per public registration records. AboutUs doesn't label sites "legit" or "a scam": this page lists the dated registration, DNS, HTTPS, mail-authentication and safety checks we could verify, each with its source, so you can decide for yourself.

Who owns codeforces.com?

Nobody has completed AboutUs's owner verification for codeforces.com. That's true of most sites here — it isn't itself a warning sign.

When was codeforces.com registered?

codeforces.com's registration dates to Apr 10, 2009 (17 years old), per public registration records. Gandi SAS is the registrar on record today.

Got a different link you're not sure about? Check it or compare codeforces.com to another site.

Suggest official facts

Correct a description, link or other detail. Submissions are reviewed before publication.

Suggest official facts

Propose corrections now; verification still controls trusted owner status.

Drafts save only in this browser for up to 7 days.

Correction review promise

Official facts can help this public profile, but publication waits for moderation, evidence, and owner-proof gates.

Correction review promise: Every submitted official fact is saved for moderation before it can change the public profile.
Evidence before publication: Reviewers compare your official URL, evidence URL, and note against the visible report findings before accepting changes.
Owner proof before control: Unverified corrections can improve the report, but owner status, DNS control, and paid outcomes still require proof.
Secure same-site intake: AboutUs accepts this public correction only from AboutUs pages, keeps the response uncached, and rate-limits noisy requests.

NameEmail

RoleProposed titleProposed summaryCategoriesOfficial URLEvidence URLReview note

Keep a backup before submitting

View prepared text