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Total

DNS

Email

Security

Network

100

Availability

Domaindocker.com

IPv41

IPv62

MX records5

StatusActive

Domain technical report

Docker: Accelerated Container Application Development

docker.com

Docker is a platform designed to help developers build, share, and run container applications. We handle the tedious setup, so you can focus on the code.

Generated: 2026-08-08T17:42:53-05:00 · Cached result

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IPv41

IPv62

MX5

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

✓

CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

5 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

80 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers19 / 35 pts · Security

5 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

23.185.0.4

AAAA

2 record(s)

2620:12a:8000::4
2620:12a:8001::4

CNAME

0 record(s)

—

Not configured

MX

5 record(s)

10 alt4.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
1 aspmx.l.google.com.
10 alt3.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.

TXT

31 record(s)

"MS=ms98031138"
"airtable-verification=7f122efe7db6b16848108e469042c39c"
"anthropic-domain-verification-p1ks1q=BmUzJzzDzqNXVWLXmZVoEvTr3"
"docusign=aeb25cd4-f743-4efc-b6fb-b8bc5dd1d0e8"
"apple-domain-verification=S580UenDqcwy2I1X"
"google-site-verification=CFmV0geNs1hCxK0mBEpjWaDoNwBIiDxIRjTvt3YGRDM"
"google-site-verification=rCKOZlVmB_xuu9DiT-urSmmXAEUGn5RI8PxdyCW5LJg"
"cursor-domain-verification-pkwbtp=KD6kIrkeudCadzeviiVJgEWnd"
"MS=ms42223923"
"google-site-verification=5e33xBJIwW1XU49IqmIYtN7yi2Iq0GNnWwN4ujn4G_M"
"google-site-verification=i6hYWAXRYCtHNnyiQAYXiy_4StkAMJQiNCfH-3olY-I"
"google-site-verification=GjEZ_3KyjpDbmRzGdMUtqMeuXdh7HCSc8uRsPGYL-I0"
"onetrust-domain-verification=fb12882ae6344670a7b91077bd57c0f1"
"astro-domain-verification=cljrj1fgz00hm01lvtaq65gnn"
"opine-verification=14d8ea53-d8ae-406f-93b0-76dc879d9b46"
"docker-verification=4b72827b-32c1-4fe6-a843-2256c0df8a31"
"google-site-verification=4PyKLfy_lowkc_qcu-byUkmF1kxAUT7tfho7ZiP353s"
"d0vcwvtyam"
"stripe-verification=804359af3a919b4a46343227e384abdf33e10ad5bb81ea9f1d17ed4e74486ab4"
"miro-verification=116f0987438eb5a48c070e080a68e7d7b3087e5f"
"google-site-verification=Nyiwo5q4kkaD5V-sEiXsW74HXyVRtKVyxYFfZuFLG7M"
"google-site-verification=VbuWA5NflxQMko2x9BJFIPVYrbuxHQll4UP4gZ4Fm08"
"atlassian-domain-verification=I1f5bgOm9sPUEcK/2JTD6weNlWt+Wwsyo5dwvJe1fGjf9V+x3kyqxZRrl9z7ILEK"
"zapier-domain-verification-challenge=c3e7ddaf-20bf-40ca-9374-1a917b16be06"
"sonatype-domain-verification=OSSRH-62474"
"jamf-site-verification=jqNgc5MzMp4UnSANweyyEQ"
"adobe-idp-site-verification=a8d1a71d0cba44c2521bcb451d9dc708ee20d93c7b5b04791f699d128bbe6ec2"
"sinch-domain-verification=d8a66194-44cf-49c3-96ab-74325ad6e7be"
"detectify-verification=87a64c3bf3301354588d90672bd1b74e"
"openai-domain-verification=dv-tj9VEsgExQvdNl9SCOa2Awju"
"v=spf1 include:_spf.google.com include:spf.tipalti.com include:_spf.salesforce.com include:mktomail.com include:mail.zendesk.com -all"

NS

4 record(s)

ns-1981.awsdns-55.co.uk.
ns-1289.awsdns-33.org.
ns-568.awsdns-07.net.
ns-207.awsdns-25.com.

SOA

1 record(s)

ns-207.awsdns-25.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

7 record(s)

0 issue "pki.goog"
0 issue "letsencrypt.org"
0 issue "sectigo.com"
0 issue "amazon.com"
0 issue "comodoca.com"
0 iodef "mailto:infra+caa-iodef@docker.com"
0 issue "digicert.com"

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

0 record(s)

—

Not configured

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 include:_spf.google.com include:spf.tipalti.com include:_spf.salesforce.com include:mktomail.com include:mail.zendesk.com -all

DMARC

Configured

v=DMARC1; p=quarantine; pct=100; rua=mailto:q1xwnepx@ag.dmarcian.com; ruf=mailto:q1xwnepx@fr.dmarcian.com;

DKIM

Selector google

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1SYxwEYAH9K843fYruoqdpK2z+nwmBGfdwMGTBmIrrAEx3e9RmvJ/pgtE8KfSRlSBHykzm3LjTHDZOzUfKDNNqZXKF6pGLY3Y/1lsPojr0QfzvT+YlAHApqrN93xZ7opkEtq8bxtw+ppY5w8CZXBS/3hth04AOXd1ON1yJsyZrpA2NtUKwlkoJu+OoNPeMg5tFUNgIwjmagDq+pFg/d3orhTsEJwofWq8dPjHCu0XBr4x0kCWNqYHuTJIRqeZfkQ7GsGNgsq457+jvIIqhJlF/5R2C1Iq0/d5ewcxIx9/L0THL3XaHbNvEKbEDadtrN6K5NvKiglzYkDpkgSjn6TGwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Docker: Accelerated Container Application Development

Description

Docker is a platform designed to help developers build, share, and run container applications. We handle the tedious setup, so you can focus on the code.

Final URL

https://www.docker.com/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.docker.com/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

docker.com

Valid from

2026-07-30T05:32:24-05:00

Valid until

2026-10-28T05:32:23-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_128_GCM_SHA256

Security headers

5 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

✓

Permissions PolicyImplemented

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

23.185.0.4

40,54 ms

Cloudflare

1.1.1.1

23.185.0.4

19,32 ms

Quad9

9.9.9.9

23.185.0.4

23,44 ms

OpenDNS

208.67.222.222

23.185.0.4

26,73 ms

AdGuard

94.140.14.14

23.185.0.4

51,73 ms

IP, geolocation and ASNAssociated network information

23.185.0.4

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

alt4.aspmx.l.google.com

Port 25: Closed/unreachable - 1.8 ms - 
Port 465: Closed/unreachable - 4023 ms - 
Port 587: Closed/unreachable - 4020.9 ms -

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