notebooks.githubusercontent.com - robtex.com
notebooks.githubusercontent.com
| CNAME | glb-db52c2cf8be544.github.com | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 140.82.114.22🇺🇸 GITHUB140.82.114.0/24 GitHub | ||||||
| PTR | lb-140-82-114-22-iad.github.com | ||||||
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.orgawsdns-hostmaster@amazon.com serial=1 | ||||||
rank #428 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: #722
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.
Same first word
Similar names
DNS History
1 record (1 active, 0 former)
●CNAMEglb-db52c2cf8be544.github.com2026-03-05 → 2026-03-28 · 2 obs
● 2026-03-28 00:51:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.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... | 1 record |
| githubusercontent.com | dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net... | - |
✅ Authoritative Response
Server:198.51.45.65
NS records: dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns-1411.awsdns-48.org, ns-181.awsdns-22.com, ns-1867.awsdns-41.co.uk, ns-596.awsdns-10.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for githubusercontent.com (unsigned zone)
⏱️ Timing
Total: 295ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | glb-db52c2cf8be544.github.com |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (ns-181.awsdns-22.com)
Analysis
IP Addresses
notebooks.githubusercontent.com points to a single IP number: 140.82.114.22.
Other host names such as lb-140-82-114-22-iad.github.com, git.io and ws.support.github.com share IP numbers with notebooks.githubusercontent.com.