HOW.IS
?

How is claudeusercontent.com?

Looks fine risk 0/100

Registered 2 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 97 ms.

Why

02050100
finecarefulhigh risk
  • ·Nothing in the checks added risk.

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

How claudeusercontent.com looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
200
97 ms · ends at claude.com
HTTPS
38 d
left on a Let's Encrypt certificate
Age
2 years
registered 2024-06-07
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records4 record types
A160.79.104.10
AAAA2607:6bc0::10
NSrandy.ns.cloudflare.com
isla.ns.cloudflare.com
TXTv=spf1 -all
RegistrationMarkMonitor Inc.
registrarMarkMonitor Inc.
registered2024-06-07
expires2030-06-07
last changed2026-07-23
ownerREDACTED FOR PRIVACY
nameserversisla.ns.cloudflare.com
randy.ns.cloudflare.com
statusclient delete prohibited
client transfer prohibited
client update prohibited
registered 2024-06-07expires 2030-06-07
HTTPS certificate38 days left
validyes
issuerLet's Encrypt
covers*.frame.claudeusercontent.com, claudeusercontent.com, frame.claudeusercontent.com
protocolTLSv1.3
issued 2026-09-11expires 2026-12-10
DNSSECinsecure

Domain is not signed with DNSSEC

. → com → claudeusercontent.com
Email authenticationfair
SPFpass v=spf1 -all
DMARCpass policy reject
DKIMnone of 20 common selectors

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

Security scoregrade B · 150/205
Basic Security
10/40missing: DNSSEC Enabled, Nameserver Diversity
Record Security
30/45missing: CAA Records, DKIM Presence
Advanced Security
15/25missing: Mail Server Configuration
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 5 lookups
SURBL MultidomainURIBL MultidomainSpamCop160.79.104.10Barracuda160.79.104.10UCEPROTECT Level 1160.79.104.10

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=claudeusercontent.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=claudeusercontent.com"

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

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

Watch claudeusercontent.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