HOW.IS
?

How is docker.io?

Looks fine risk 0/100

Registered 14 years ago, on no blocklists we checked, valid HTTPS, the site answered 200 in 42 ms.

Why

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

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

How docker.io looks right now
The home page, rendered by how.is in a sandboxed browser. Nothing on it is clickable here.
Site
200
42 ms · ends at www.docker.com
HTTPS
127 d
left on a Amazon certificate
Age
14 years
registered 2012-12-17
Blocklists
0
listings across 5 lists

Everything we looked at

DNS records6 record types
A34.197.141.94
32.193.181.249
54.163.166.73
AAAA2600:1f18:2148:bc01:8ace:b487:fcc3:4aa9
2600:1f18:2148:bc02:8e44:7374:21f:7eda
2600:1f18:2148:bc00:eb39:1baf:a9b:8d58
MX10 aspmx.l.google.com
20 alt1.aspmx.l.google.com
30 aspmx2.googlemail.com
30 aspmx3.googlemail.com
30 aspmx4.googlemail.com
30 aspmx5.googlemail.com
NSns-1168.awsdns-18.org
ns-1827.awsdns-36.co.uk
ns-421.awsdns-52.com
ns-513.awsdns-00.net
TXT994564986-4236403
detectify-verification=87a64c3bf3301354588d90672bd1b74e
google-site-verification=cusX3h3wUlq3D6vk24INmIXpuJdQ46-uKjIAM9Of8Lo
google-site-verification=v2_0BdJWKUR2kM7Ysv_QB9LhCqd2Xn6QCZiInuaRwFc
v=spf1 include:mailgun.org -all
CAA{'type': 'CAA', 'iodef': 'mailto:infra+caa-iodef@docker.com', 'critical': 0}
{'type': 'CAA', 'issue': 'amazon.com', 'critical': 0}
{'type': 'CAA', 'issue': 'comodoca.com', 'critical': 0}
{'type': 'CAA', 'issue': 'letsencrypt.org', 'critical': 0}
{'type': 'CAA', 'issue': 'pki.goog', 'critical': 0}
RegistrationGandi SAS
registrarGandi SAS
registered2012-12-17
expires2026-12-17
last changed2026-08-12
ownerDocker Inc.
nameserversns-1168.awsdns-18.org
ns-421.awsdns-52.com
ns-1827.awsdns-36.co.uk
ns-513.awsdns-00.net
statusclient transfer prohibited
registered 2012-12-17expires 2026-12-17
HTTPS certificate127 days left
validyes
issuerAmazon
covers*.docker.com, dockercon.com, docker.com, *.docs.docker.com, docs.docker.com, docker.io, *.docker.io, *.dockercon.com
protocolTLSv1.3
issued 2026-02-03expires 2027-03-04
DNSSECinsecure

Domain is not signed with DNSSEC

. → io → docker.io
Email authenticationexcellent
SPFpass v=spf1 include:mailgun.org -all
DMARCpass policy quarantine
DKIMfound: google

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

Security scoregrade A · 185/205
Basic Security
20/40missing: DNSSEC Enabled
Record Security
45/45missing: DKIM Presence
Advanced Security
25/25
Domain Reputation
50/50
Threat Detection
45/45missing: Domain Age Check
Blocklists0 listings · 11 lookups
SURBL MultidomainURIBL MultidomainSpamCop34.197.141.94Barracuda34.197.141.94UCEPROTECT Level 134.197.141.94SpamCop32.193.181.249Barracuda32.193.181.249UCEPROTECT Level 132.193.181.249SpamCop54.163.166.73Barracuda54.163.166.73UCEPROTECT Level 154.163.166.73

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=docker.io" \ -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=docker.io"

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

Watch docker.io. 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