HOW.IS
?

How is xundns.com?

Be careful risk 20/100

Registered 19 years ago, on no blocklists we checked, no valid HTTPS certificate, the site did not answer (OSError).

Why

02050100
finecarefulhigh risk
  • +20No valid HTTPS certificate.

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

Site
down
OSError
HTTPS
invalid
connect ECONNREFUSED 83.229.124.96:443
Age
19 years
registered 2007-08-29
Blocklists
0
listings across 4 lists; 1 did not answer

Everything we looked at

DNS records5 record types
A154.9.25.113
38.207.179.237
83.229.124.96
AAAA2001:df1:7880:100::1ee
2001:df1:7880:101::268
MX1 mx1.feishu.cn
10 mx3.feishu.cn
5 mx2.feishu.cn
NSu2.xundns.com
u1.xundns.com
TXTv=spf1 +include:_netblocks.m.feishu.cn -all
verification-code-site-App_feishu=C7GuBh7s2VT0fPbOsj42
RegistrationGoDaddy.com, LLC
registrarGoDaddy.com, LLC
registered2007-08-29
expires2027-08-29
last changed2026-10-28
nameserversu1.xundns.com
u2.xundns.com
statusclient delete prohibited
client renew prohibited
client transfer prohibited
client update prohibited
registered 2007-08-29expires 2027-08-29
HTTPS certificatenot valid
validno
problemconnect ECONNREFUSED 83.229.124.96:443
DNSSECinsecure

Domain is not signed with DNSSEC

. → com → xundns.com
Email authenticationpoor
SPFpass v=spf1 +include:_netblocks.m.feishu.cn -all
DMARCnone
DKIMnone of 1 common selectors

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

Security scoregrade B · 145/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
15/45missing: CAA Records, DMARC Record, DKIM Presence
Advanced Security
25/25
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 11 lookups
SURBL MultidomainURIBL MultidomainSpamCop83.229.124.96Barracuda83.229.124.96UCEPROTECT Level 183.229.124.96SpamCop38.207.179.237Barracuda38.207.179.237UCEPROTECT Level 138.207.179.237SpamCop154.9.25.113Barracuda154.9.25.113UCEPROTECT Level 1154.9.25.113

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=xundns.com" \ -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=xundns.com"

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

IPv6. IPv6 readiness grade for xundns.com Does xundns.com work over IPv6? See the live check on aaaa.bot — website, mail and nameservers, graded A–F.

Watch xundns.com. 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