sudoku.com
No paid content found
Multilingual
Categories: Games & Board Games
Play free Sudoku online from Easy to Expert level on Sudoku.com. Select a difficulty level of a web sudoku puzzle to challenge yourself and enjoy the game!
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Updated: 2026-09-26 20:25
Language: English (default)
Access: Normal
Profile views 5
Outbound visits 1
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Website Overview
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 2000, this domain has about 26 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 .com extension, which is not an independent safety signal.
DNS and Email
Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the Google Workspace email service. DNSSEC is enabled, allowing validating resolvers to authenticate signed DNS data. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown.
TLS and Certificates
The public key uses EC with 256 bits. 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 within the Google Trust Services cloud or CDN ecosystem. The certificate's total validity is about 90 days, consistent with a short renewal cycle.
HTTP and Browser Security
The response lacks these common security headers: X-Content-Type-Options, Referrer-Policy, Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers. The Server header identifies cloudflare without an exact version.
Technology Stack Analysis
The public page identifies Google Analytics, Cloudflare without precise versions, leaving fewer clues for version-specific scanning.
Search and Social Sharing
No Open Graph metadata was detected, so social previews may depend on platform inference. The page declares 17 language or regional alternatives using hreflang. The title has 50 characters, within a common display range. A meta description is present, with 155 characters. The observed directives allow indexing and link following.
Hosting and Email
Cloudflare
Hosting
Google Workspace
Location
Location unknown
104.18.32.167
Pages, Search and Sharing
| Meta description | Play free Sudoku online from Easy to Expert level on Sudoku.com. Select a difficulty level of a web sudoku puzzle to challenge yourself and enjoy the game! |
|---|---|
| Canonical URL | https://sudoku.com/ |
| Language | English (default) · Multilingual |
| Twitter Card | Not detected |
Unknown
robots.txt (opens in a new tab)
10 rules
amazonadbot 1 allowed · 0 disallowed
amazonadbot
/
All bots 0 allowed · 9 disallowed
/ad-blacklist/wp-content*/admin*/share-results//files//private//api/*?lang=*/cdn-cgi/
No matching rules.
Sitemaps
1
Registration details RDAP / WHOIS
| Registrar | GoDaddy.com, LLC |
|---|---|
| Registered | 2000-05-22 |
| Expires | 2027-05-22 |
| Domain status | client delete prohibited、client renew prohibited、client transfer prohibited、client update prohibited |
| Nameservers | justin.ns.cloudflare.com、olga.ns.cloudflare.com |
| DNSSEC | signed |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | sudoku.com | 104.18.32.167 | 300 | — |
| A | sudoku.com | 172.64.155.89 | 300 | — |
| AAAA | sudoku.com | 2606:4700:4401::ac40:9b59 | 174 | — |
| AAAA | sudoku.com | 2606:4700:4406::6812:20a7 | 174 | — |
| MX | sudoku.com | aspmx.l.google.com | 300 | 1 |
| MX | sudoku.com | alt1.aspmx.l.google.com | 300 | 5 |
| MX | sudoku.com | alt2.aspmx.l.google.com | 300 | 5 |
| MX | sudoku.com | aspmx2.googlemail.com | 300 | 10 |
| MX | sudoku.com | aspmx3.googlemail.com | 300 | 10 |
| NS | sudoku.com | justin.ns.cloudflare.com | 86400 | — |
| NS | sudoku.com | olga.ns.cloudflare.com | 86400 | — |
| TXT | sudoku.com | 1password-site-verification=K5EFUBEURNDG5ORTAM7BF5ZYNM | 300 | — |
| TXT | sudoku.com | google-site-verification=Ayve6gg5SSR1nB4ohfJPOkB5GUm-zgUbgRRwmv9MGmw | 300 | — |
| TXT | sudoku.com | v=spf1 include:_spf.google.com ~all | 300 | — |
| DS | sudoku.com | 2371 13 2 6540e0148edbc94394f6979d6c7f3bcc9a182c0e4aec401d73eda9185aa5a0cc | 86400 | — |
| DMARC | _dmarc.sudoku.com | v=DMARC1; p=quarantine | 300 | — |
TLS and certificates
| Assessment | Normal configuration |
|---|---|
| Supported protocols | TLSv1.2、TLSv1.3 |
| Negotiated protocol | TLSv1.3 |
| Certificate subject | sudoku.com |
| Issuer | Google Trust Services |
| Valid until | 2026-11-12T19:40 · Remaining when checked: 46 days |
| Verification details | Certificate trust: Passed · Hostname match: Passed |
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=UTF-8 |
| cache-control | max-age=0, must-revalidate, private |
| server | cloudflare |
| strict-transport-security | max-age=31536000 |
| content-security-policy | upgrade-insecure-requests |
| x-frame-options | SAMEORIGIN |
| set-cookie | Redacted |
Identified technologies
Recent Updates
- Website images
- Screenshots
- Network details
- Website Technologies
- Pages and Search Information
- HTTP Response Information
- TLS and certificates
- DNS Information
- Domain Registration
- Website profile
- Website Description
- Website Name
- Website profile
- Website Description
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