How is sina.com.cn?

Not sure yet risk 10/100

On no blocklists we checked, valid HTTPS, the site answered 200 in 1877 ms.

Why

02050100

finecarefulhigh risk

+10The registry did not report a usable creation date.
·Could not check domain age; retry before trusting this domain.

Rule-based: domain age, blocklists, TLS. A heuristic, not a guarantee.

The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.

Site

200

1877 ms · ends at www.sina.com.cn

HTTPS

64 d

left on a DigiCert, Inc. certificate

Age

creation date not reported

Blocklists

listings across 5 lists

Everything we looked at

DNS records4 record types

A	36.51.254.91
MX	10 freemx2.sinamail.sina.com.cn 10 freemx1.sinamail.sina.com.cn 10 freemx3.sinamail.sina.com.cn
NS	ns2.sina.com.cn ns1.sina.com.cn ns4.sina.com.cn ns3.sina.com.cn
TXT	v=spf1 include:spf.sinamail.sina.com.cn -all

Registration北京新网数码信息技术有限公司

registrar	北京新网数码信息技术有限公司
nameservers	ns3.sina.com.cn ns2.sina.com.cn ns4.sina.com.cn ns1.sina.com.cn
status	clientDeleteProhibited serverDeleteProhibited clientUpdateProhibited serverUpdateProhibited clientTransferProhibited serverTransferProhibited

HTTPS certificate64 days left

valid	yes
issuer	DigiCert, Inc.
covers	sina.com, m.beacon.sina.com.cn, img.star.weibo.com, wk.impress.sinaimg.cn, www.sina.com, cre.dp.sina.cn, i.sso.sina.com.cn, img.dmp.sina.com.cn, int.dpool.sina.com.cn, sina.com.cn, sinaimg.cn, vip.stock.finance.sina.com.cn
protocol	TLSv1.3

issued 2025-12-02expires 2026-12-30

DNSSECinsecure

Domain is not signed with DNSSEC

. → cn → com.cn → sina.com.cn

Email authenticationpoor

SPF	pass `v=spf1 include:spf.sinamail.sina.com.cn -all`
DMARC	none
DKIM	none of 1 common selectors

Whether mail claiming to be from this domain can be checked as genuine.

Security scoregrade C · 135/205

Basic Security

10/40missing: DNSSEC Enabled, Nameserver Diversity

Record Security

15/45missing: CAA Records, DMARC Record, DKIM Presence

Advanced Security

15/25missing: SOA Record Configuration, IPv6 Support

Domain Reputation

50/50

Threat Detection

45/45missing: Domain Age Check

Blocklists0 listings · 5 lookups

SURBL MultidomainURIBL MultidomainSpamCop36.51.254.91Barracuda36.51.254.91UCEPROTECT Level 136.51.254.91

Green: clean. Red: listed. Grey: the list did not answer.

Ask it yourself

Agents get this as data. Bought through the API, the checks behind this page cost $0.070: profile $0.025 + trust $0.020 + screenshot $0.020 + site status $0.005.

curl "https://how.is/v1/domain/trust?domain=sina.com.cn" \ -H "Authorization: Bearer $HOWIS_KEY" # or pay per call in USDC (x402), no key: the 402 tells your agent the price curl -i "https://how.is/v1/domain/profile?domain=sina.com.cn"

MCP: add https://how.is/mcp to Claude, Codex or Cursor (one-line install) and ask for domain_trust on sina.com.cn. Reference: /llms.txt.

Watch sina.com.cn. DNS read at the source every 5 minutes; certificate, blocklists and expiry every 6 hours. You get an email only when something changes.

Watch — $1 / 30 days