Rank #9,715Updated November 10, 2026
w3school.com.cn
W3School 在线教程
The site runs on ASP.NET, Universal Analytics, cdnjs and 2 other technologies. Its email security grade is F. Its SSL certificate is issued by DigiCert Inc and is valid for 70 more days.
- Domain age
- —
- Technologies
- 5
- Email security
- F
- SSL days left
- 70
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 120.55.40.41 | 600 |
| MX | mxbiz2.qq.com 10 | 3600 |
| MX | mxbiz1.qq.com 5 | 3600 |
| NS | dns7.hichina.com | 86400 |
| NS | dns8.hichina.com | 86400 |
| TXT | google-site-verification=t-82sDcVoSrtPX0JwbSvV2Jv6q7MlKeX3nIsbpzvmEo | 600 |
Technology stack
Analytics and advertising IDs
google_analytics:UA-878633-1SSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, Encryption Everywhere DV TLS CA - G2, DigiCert Inc |
| Expires | January 20, 2027 |
| Days remaining | 70 |
| Protocol | TLSv1.2 |
| Names | w3school.com.cn, www.w3school.com.cn |
Email security
FScore 5/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
- badNo SPF record. Anyone can send email that claims to come from w3school.com.cn.
- badNo DMARC record. Receivers have no instructions for mail that fails SPF and DKIM, and you get no reports about who sends as your domain.
- warnNo DKIM key found at common selectors (google, selector1, selector2, default, k1, k2, s1, s2, ...). DKIM may still use a custom selector we cannot guess.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- good2 MX record(s) found. Mail is handled by Tencent Exmail.
Homepage metadata
| Title | W3School 在线教程 |
|---|---|
| Description | 提供结构清晰、通俗易懂的 Web 开发教程，内含海量实战示例，涵盖 HTML、CSS、JavaScript、SQL、Python、PHP、Bootstrap、Java、XML 等多种技术。 |
| Language | zh-cn |
| Indexable | Yes |
| Word count | 398 |
About w3school.com.cn
What technology does w3school.com.cn use?
We detected 5 technologies on w3school.com.cn, including Universal Analytics, cdnjs, Font Awesome, ASP.NET, Microsoft IIS.
Does w3school.com.cn protect its email with SPF and DMARC?
w3school.com.cn scores 5/100 (grade F) for email security. No SPF record. Anyone can send email that claims to come from w3school.com.cn. No DMARC record. Receivers have no instructions for mail that fails SPF and DKIM, and you get no reports about who sends as your domain.
What are the name servers of w3school.com.cn?
w3school.com.cn uses dns7.hichina.com, dns8.hichina.com.