`5.githubusercontent.com`

DNSSEC	⚠️ Not signed
A	185.199.108.133^{🇺🇸 Fastly185.199.108.0/24 GitHub - 185.199.108.0/24}
		PTR	`cdn-185-199-108-133.github.com`
A	185.199.109.133^{🇺🇸 Fastly185.199.109.0/24 GitHub - 185.199.109.0/24}
A	185.199.110.133^{🇺🇸 Fastly185.199.110.0/24 GitHub - 185.199.110.0/24}
A	185.199.111.133^{🇺🇸 Fastly185.199.111.0/24 GitHub - 185.199.111.0/24}

`githubusercontent.com`

	DNSSEC	⚠️ Not signed
	NS	`ns-1411.awsdns-48.org` ⭐
	NS	`dns1.p01.nsone.net`
	NS	`dns2.p01.nsone.net`
	NS	`dns3.p01.nsone.net`
	NS	`dns4.p01.nsone.net`
	NS	`ns-181.awsdns-22.com`
	NS	`ns-1867.awsdns-41.co.uk`
	NS	`ns-596.awsdns-10.net`
	TXT	`globalsign-domain-verification=2wiwCKYW7kQ6LJntfIcdi5EG56lUlQIRj_VGJnEEKb`
	TXT	`v=spf1 a -all`
	SOA	`ns-1411.awsdns-48.org`awsdns-hostmaster@amazon.com serial=1

rank #749 globally
rank #431 in the tld
this domain is a GitHub-owned content delivery network domain used to serve user-generated content and assets associated with GitHub features, such as images, avatars, attachments, and static files linked from repositories, issues, or pages. It functions as a CDN to efficiently deliver those resources without loading them directly from repository URLs.📈 Tranco rank: #759

Overview

githubusercontent.com is GitHub's content delivery network (CDN) domain used to serve user-generated content and static assets. It separates raw file content from the main github.com domain for security and performance reasons.

Primary Uses

raw.githubusercontent.com — Serves raw file content from repositories (source code, configuration files, scripts)
avatars.githubusercontent.com — Hosts user profile pictures and organization logos
camo.githubusercontent.com — Proxies external images in README files and issues for privacy/security
objects.githubusercontent.com — Serves Git LFS (Large File Storage) objects
user-images.githubusercontent.com — Hosts images uploaded to issues, comments, and discussions

Technical Infrastructure

DNS Provider: Dual-provider setup with AWS Route 53 and NS1 for redundancy

Nameservers:

AWS: ns-181.awsdns-22.com, ns-596.awsdns-10.net, ns-1867.awsdns-41.co.uk, ns-1411.awsdns-48.org
NS1: dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net

Security: SPF record configured (v=spf1 a -all). DNSSEC is not enabled.

Ownership

Owned and operated by GitHub, Inc., a subsidiary of Microsoft Corporation since 2018. The domain serves billions of requests daily as part of GitHub's infrastructure supporting over 100 million developers worldwide.

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DNS History

4 records (4 active, 0 former)

●A185.199.108.1332026-02-16 → 2026-04-23 · 2 obs

● 2026-02-16 00:36:28
● 2026-04-23 11:38:00

●A185.199.109.1332026-02-16 → 2026-04-23 · 2 obs

● 2026-02-16 00:36:28
● 2026-04-23 11:38:00

●A185.199.110.1332026-02-16 → 2026-04-23 · 2 obs

● 2026-02-16 00:36:28
● 2026-04-23 11:38:00

●A185.199.111.1332026-02-16 → 2026-04-23 · 2 obs

● 2026-02-16 00:36:28
● 2026-04-23 11:38:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, h.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net...	-
githubusercontent.com	ns-181.awsdns-22.com, ns-596.awsdns-10.net, ns-1867.awsdns-41.co.uk, ns-1411.awsdns-48.org...	2 records

✅ Authoritative Response

Server:198.51.44.1

NS records: ns-181.awsdns-22.com, ns-596.awsdns-10.net, ns-1867.awsdns-41.co.uk, ns-1411.awsdns-48.org, dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for githubusercontent.com (unsigned zone)

⏱️ Timing

Total: 525ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`185.199.109.133, 185.199.111.133...`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-181.awsdns-22.com, ns-181.awsdns-22.com)

Analysis

IP Addresses

Four IP numbers are pointed to by 5.githubusercontent.com: 185.199.108.133, 185.199.109.133, 185.199.110.133 and 185.199.111.133.

other host names including 1-9-9-7.githubusercontent.com, 159nautilus.10machines1.githubusercontent.com, 100.githubusercontent.com, 94.githubusercontent.com and sraw.githubusercontent.com share IP numbers with 5.githubusercontent.com.

5.githubusercontent.com - robtex.com