51liangjiao.net

HTML metadata

Technology

CDN

Cloudflare

Third-party hosts loaded (3)

• cdn.jsdelivr.net×2
• cdnjs.cloudflare.com×1
• sdk.51.la×1

Contact

Phone

• 021-50861234
• 31011502004567
• 31011500012345
• 021-50865678
• 021-50861235

Address

上海市浦东新区张江高科技园区科苑路88号良教大厦, 201203, 上海, CN

Registration

Registrar

Gname.com Pte. Ltd.

Created

2023-09-18

Expires

2026-09-18 103 days left

Updated

2026-02-01

Name servers

• adele.ns.cloudflare.com
• ian.ns.cloudflare.com

DNS records live

NS

• adele.ns.cloudflare.com
• ian.ns.cloudflare.com

Email authentication no MX

SPF

not published

DMARC

not published

DKIM

no key found at common selectors

Certificate (current)

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.51liangjiao.net

present

• strict-transport-security

findings

• missing Content Security Policy
• missing frame protection
• missing content type protection
• missing Referrer Policy
• missing Permissions Policy

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