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checkio.org
CheckiO - coding websites and programming games. Improve your coding skills by solving coding challenges and exercises online with your friends in a fun way. Exchanges experience with other users online through fun coding activities
At a glance
- Category
- Development
- Language
- English
- Paid-content signal
- No paid content foundObserved
- Registered
- 2010
- Hosting
- Akamai Connected CloudInferred
- HTTPS certificate trusted
- PassedObserved
- Last updated
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Website Overview
Identifiable technologies and additional version or configuration signals make the service easier to fingerprint, which may help targeted scanners narrow their checks. An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.
Domain and Registration
Registered in 2010, this domain has about 16 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The registrar is GoDaddy.com, LLC, a widely used domain service provider. The domain uses the common .org extension, which is not an independent safety signal.
DNS and Email
MX records exist, but SPF, DKIM and DMARC were not detected. Protection against domain impersonation may be incomplete. Nameservers are provided by DigitalOcean, indicating managed DNS hosting. MX records point to the Google Workspace email service. No CNAME was found; the observed records resolve directly to addresses. TXT records include verification markers for Google. Such markers may also remain after a service stops being used.
TLS and Certificates
The certificate uses an RSA 4096-bit public key, offering broad client compatibility. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.
HTTP and Browser Security
The Server header exposes the software version: nginx/1.29.6. This makes version-targeted checks easier, but is not proof of an exploitable vulnerability. The response lacks these common security headers: CSP, Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. No obvious internal addresses or debug information were found in the headers. Cookie security attributes are unknown.
Technology Stack Analysis
The public page identifies Google Tag Manager, Google Analytics, Sentry, nginx 1.29.6, with exact versions exposed for 1 technologies. These details can narrow vulnerability checks, although exposure alone is not a vulnerability.
Search and Social Sharing
The title has 75 characters and may be truncated in search results. No homepage meta description was detected, leaving snippet selection more dependent on page text. No homepage canonical URL was detected. If duplicate URLs exist, consolidation may be less explicit. Open Graph is partially configured; og:type is missing. The observed directives allow indexing and link following.
Hosting and Email
DigitalOcean
Akamai Connected Cloud
Google Workspace
Fremont, California, United States
Inferred
74.207.241.71
Registration details
| Registrar | GoDaddy.com, LLC |
|---|---|
| Registered | 2010-04-12 |
| Expires | 2027-04-12 |
| Domain status | client delete prohibited、client renew prohibited、client transfer prohibited、client update prohibited |
| Nameservers | ns1.digitalocean.com、ns2.digitalocean.com、ns3.digitalocean.com |
| DNSSEC | unsigned |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | checkio.org | 74.207.241.71 | 3581 | — |
| MX | checkio.org | aspmx.l.google.com | 1800 | 1 |
| MX | checkio.org | alt1.aspmx.l.google.com | 1800 | 5 |
| MX | checkio.org | alt2.aspmx.l.google.com | 1800 | 5 |
| MX | checkio.org | alt3.aspmx.l.google.com | 1800 | 10 |
| MX | checkio.org | alt4.aspmx.l.google.com | 1800 | 10 |
| NS | checkio.org | ns1.digitalocean.com | 1147 | — |
| NS | checkio.org | ns2.digitalocean.com | 1147 | — |
| NS | checkio.org | ns3.digitalocean.com | 1147 | — |
| TXT | checkio.org | google-site-verification=MpeZ8gVHCFI4EhQ87rl0OA8KFsuKomBg7rtSuhO-qzM | 1429 | — |
| TXT | checkio.org | google-site-verification=gQkefe4hzBtMNw5Vl2dE_Z_x-VmyuxbfMDGxdIy9YM0 | 1429 | — |
| DMARC | checkio.org | google-site-verification=MpeZ8gVHCFI4EhQ87rl0OA8KFsuKomBg7rtSuhO-qzM | 3600 | — |
| DMARC | checkio.org | google-site-verification=gQkefe4hzBtMNw5Vl2dE_Z_x-VmyuxbfMDGxdIy9YM0 | 3600 | — |
TLS and certificates
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=utf-8 |
| content-language | en-us |
| server | nginx/1.29.6 |
| strict-transport-security | max-age=31536000 |
| x-frame-options | DENY |
| x-content-type-options | nosniff |
| referrer-policy | same-origin |
| set-cookie | Redacted |
Identified technologies
Pages, Search and Sharing
| Meta description | Not detected |
|---|---|
| Canonical URL | Not detected |
| Language | English (default) |
| Twitter Card | Not detected |
Social Sharing Preview
3 fields
robots.txt (opens in a new tab)
2 rulesAll bots 0 allowed · 2 disallowed
- Disallow
/oauth/ - Disallow
/complete/
No matching rules.
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