docs.docker.io - dns.ninja

`docs.docker.io`

	CNAME	`elb-io.us-east-1.aws.dckr.io`
	DNSSEC	⚠️ Not signed
	A	2600:1f18:2148:bc00:d566:96df:3881:9176^{🇺🇸 Amazon2600:1f18:2000::/35 AMAZON EC2 IAD prefix}
	A	2600:1f18:2148:bc01:19a2:cb5e:5618:a94a^{🇺🇸 Amazon2600:1f18:2000::/35 AMAZON EC2 IAD prefix}
	A	2600:1f18:2148:bc02:6d8b:758a:2fb1:21ec^{🇺🇸 Amazon2600:1f18:2000::/35 AMAZON EC2 IAD prefix}
	A	44.216.85.47^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
	A	52.23.31.132^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
	A	52.202.112.241^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix}

`docker.io`

	DNSSEC	⚠️ Not signed
	A	2600:1f18:2148:bc00:d566:96df:3881:9176^{🇺🇸 Amazon2600:1f18:2000::/35 AMAZON EC2 IAD prefix}
	A	2600:1f18:2148:bc01:19a2:cb5e:5618:a94a^{🇺🇸 Amazon2600:1f18:2000::/35 AMAZON EC2 IAD prefix}
	A	2600:1f18:2148:bc02:6d8b:758a:2fb1:21ec^{🇺🇸 Amazon2600:1f18:2000::/35 AMAZON EC2 IAD prefix}
	A	44.216.85.47^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
	A	52.23.31.132^{🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix}
	A	52.202.112.241^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix}
	NS	`ns-513.awsdns-00.net` ⭐
	NS	`ns-1168.awsdns-18.org`
	NS	`ns-1827.awsdns-36.co.uk`
	NS	`ns-421.awsdns-52.com`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
	MX	`aspmx2.googlemail.com`⁽³⁰⁾
	MX	`aspmx3.googlemail.com`⁽³⁰⁾
	MX	`aspmx4.googlemail.com`⁽³⁰⁾
	MX	`aspmx5.googlemail.com`⁽³⁰⁾
	TXT	`994564986-4236403`
	TXT	`detectify-verification=87a64c3bf3301354588d90672bd1b74e`
	TXT	`google-site-verification=cusX3h3wUlq3D6vk24INmIXpuJdQ46-uKjIAM9Of8Lo`
	TXT	`google-site-verification=v2_0BdJWKUR2kM7Ysv_QB9LhCqd2Xn6QCZiInuaRwFc`
	TXT	`v=spf1 include:mailgun.org -all`
	SOA	`ns-513.awsdns-00.net`awsdns-hostmaster@amazon.com serial=1

WOT: SAFE (90/100)
rank #29078 globally
rank #355 in the tld
WOT: SAFE (92/100)
📈 Tranco rank: #951

Docker

Docker is an open platform for developing, shipping, and running applications using containerization technology. Founded in 2013, Docker revolutionized software deployment by enabling developers to package applications with all their dependencies into standardized units called containers. This ensures applications run consistently across different environments, from development laptops to production servers.

Key Products & Services

Docker Engine – The core runtime for building and running containers, featuring a client-server architecture with the Docker daemon (dockerd) and CLI
Docker Hub – Public registry for storing and sharing container images, with both public and private repositories
Docker Desktop – Integrated development environment for Mac, Windows, and Linux, bundling Docker Engine, CLI, Compose, and Kubernetes
Docker Compose – Tool for defining and running multi-container applications using YAML configuration

Infrastructure

The docker.io domain is hosted on Amazon Web Services (AWS):

Nameservers: AWS Route 53 (ns-421.awsdns-52.com, ns-513.awsdns-00.net, ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk)
Web hosting: Three AWS IP addresses in the us-east-1 region (34.192.54.61, 52.4.217.236, 52.202.65.118)
Email: Google Workspace (6 MX records with priorities 10-30)
IPv6: Fully enabled with 2600:1f18:2148:bc00::/64 addresses
DNSSEC: Not enabled

Docker's containerization technology uses Linux kernel namespaces to provide isolated workspaces, making it a foundational tool in modern CI/CD pipelines and cloud-native development.

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docs.org.ua

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docs.com.es

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DNS History

1 record (1 active, 0 former)

●CNAMEelb-io.us-east-1.aws.dckr.io2026-02-16 → 2026-06-30 · 2 obs

● 2026-02-16 12:37:52
● 2026-06-30 15:30:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
io	a2.nic.io, b0.nic.io, c0.nic.io, a0.nic.io	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-
docker.io	ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net	-

✅ Authoritative Response

Server:205.251.199.35

NS records: ns-1168.awsdns-18.org, ns-1827.awsdns-36.co.uk, ns-421.awsdns-52.com, ns-513.awsdns-00.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for docker.io (unsigned zone)

⏱️ Timing

Total: 1088ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`elb-io.us-east-1.aws.dckr.io`

Analysis

IP Addresses

docs.docker.io directs to 6 IP numbers: 44.216.85.47, 52.23.31.132, 52.202.112.241 and 3 other.

Two other host names, along with trial.docker.com, elb-default.us-east-1.aws.dckr.io and ec2-52-202-112-241.compute-1.amazonaws.com, also share IP numbers with docs.docker.io.