History
On record since 2009 · Registered with Gandi SAS.
Dated facts on record, not a verdict on the site. Full ownership history report on who.is
Website report snapshot
codeforces.com has an AboutUs profile for public website intelligence, ownership context, trust signals, monitoring, and owner verification.
The Authority/Safety methodology, live trust checks, and infrastructure context behind the answer above.
Can I trust this site?
Sourced website trust answerThe live checks and dated facts below help you evaluate this website. If you own it, claiming it free turns this into an owner-controlled record.
Facts, not verdicts. AboutUs shows sourced signals and the next owner action; it is not a scam label.
A check was blocked by bot protection
The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Oct 5, 2026).
Source freshness: Not established
No known risk flags
The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Oct 5, 2026).
Blacklist / threat feeds
Threat-feed coverage is not attached for this domain yet.
Email authentication
SPF record not found; DMARC record found.
Next step
Claim this profile
Submit the owner request and prove control with a DNS TXT record for this domain.
On record since 2009 · Registered with Gandi SAS.
Dated facts on record, not a verdict on the site. Full ownership history report on who.is
Current public signals checked for this report.
6 records
The domain resolves through public DNS.
Source: AboutUs public DNS lookup
Blocked by Cloudflare's bot protection
The site's own edge security (Cloudflare) intercepted this automated check with a bot-protection challenge before it reached the site itself. This is not evidence about the site's HTTPS setup — AboutUs could not complete this check. The checked HTTPS hostname is unavailable in this result.
Source: AboutUs live HTTPS response
No breaches on record
Have I Been Pwned has no catalogued breaches for this domain. Absence of a record is not a guarantee that no breach occurred.
Source: Have I Been Pwned
Authority and safety snapshot
This report combines public evidence source, live checks, freshness, and ownership status so readers can evaluate the website without treating the score as a popularity rank.
Report score
41/100
Watchlist report
Launch state
Claimable starter
Useful now, noindexed for safety
Owner status
Claimable
No owner has verified domain control for this profile yet. Crawler and archive evidence remain visible, and official facts should be submitted through review.
Search visibility
Noindex starter profile
Generated starter profiles are available for claims and crawler demand, but are not eligible for search indexing until they become crawler-backed public records.
Report summary
Moderate report issues can be improved with verified owner facts, fresh crawler evidence, or corrected profile details.
What should improve before this profile becomes a stronger launch or owner asset.
Claim and verify this profile to turn public crawler data into an owner-confirmed trust record.
Verify ownership
The website owner needs to prove domain control with DNS before AboutUs treats owner facts as official.
Unlocks: Owner-controlled edits, verified status, stronger launch confidence, and paid owner setup.
Start owner claimGenerated starter profiles are available for claims and crawler demand, but are not eligible for search indexing until they become crawler-backed public records.
Clear launch gate
AboutUs can review evidence and indexing rules, while the owner can improve trust by verifying and correcting facts.
What the correction form will prefill
Finding: Noindex starter profile
Official and evidence URL start as https://codeforces.com; owners can replace the evidence URL with a deeper source page.
The review note includes this finding plus the ranked report context.
Unlocks: Safer search indexing, sitemap inclusion, and cleaner public discovery after domain cutover.
The recommended path from public report to verified owner value.
Watch checks this site's homepage, DNS and certificates and shows you what changed, with dated evidence. $4.99/mo or $49.90/yr — see a sample
Evidence used now
Score source
Shared v2 modelThe report uses the same stored-input model as the profile and directory. Its score, band, reasons and coverage come from that model together.
Safety model
90/100 · ClearCoverage shown; confidence not calibrated; Safety is 90/100 and current band is Clear.
External popularity
Tranco #5,280 · Open PageRank 7.1/10Popularity evidence is attached as context, not as a guarantee of safety.
Domain age evidence
17.5 yearsRDAP/domain-age context is attached to the safety model from a lookup cached on Sep 19, 2026.
Threat-feed coverage
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).Coverage follows the displayed model and its current-source checks; unknown inputs are not clean results.
Last authority refresh
Sep 30, 2026Stored authority columns include a refresh timestamp for this profile.
Recommended authority action
Prove domain control so the site owner can improve facts and attach owner intent to this profile.
Outcome: Turns crawler-only evidence into an owner-controlled record.
Start owner claimScore basis
Owner improvement cap
The findings below are holding this score down. Resolving them raises it.
This is not a fraud verdict or PageRank score. It is an AboutUs signal summary based on current report-derived signals, live checks, ownership, freshness, and evidence source.
Authority includes Open PageRank data.
The crawler still needs to enrich this profile before AboutUs can treat it as a complete public report.
Improve source evidence
AboutUs can enrich crawler evidence automatically; owner-submitted facts make the report stronger when source evidence is thin.
Unlocks: A higher-quality report that is easier to trust, claim, monitor, and eventually monetize.
Request monitoring or recrawlAboutUs has not recorded a usable crawl or update timestamp for this profile yet.
Refresh the report
AboutUs can recrawl and compare current public signals, then keep owners informed when important facts change.
Unlocks: Fresh report evidence, useful monitoring alerts, and more confidence in downloaded snapshots.
Request monitoring or recrawlThe site's own edge security (Cloudflare) intercepted this automated check with a bot-protection challenge before it reached the site itself. This is not evidence about the site's HTTPS setup — AboutUs could not complete this check.
Recheck and monitor
AboutUs can keep monitoring this signal, but the website owner may need to correct the underlying public site configuration.
Unlocks: Better public confidence and a clearer owner action path.
Request monitoring or recrawlAboutUs Watch
$4.99 USD per website / month, plus applicable tax
Track observed homepage text, visual and DNS changes with dated evidence and an optional weekly email brief.
Claiming, DNS verification and factual corrections remain free. Monitoring records changes; it does not improve scores or guarantee safety.