Domain report
threeplusone.com
threeplusone.com ranks in the top 0.079% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 3 distinct hosts observed under it.
Connectivity
- Top percentile
- 0.079%
- Hosts observed
- 3
From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means
HTTPS reachability
https://threeplusone.com/ answered with HTTP 200.
DNS records
- A
- 185.199.111.153
- 185.199.109.153
- 185.199.108.153
- 185.199.110.153
- AAAA
- No records found.
- MX
- 1 aspmx.l.google.com.
- 5 alt1.aspmx.l.google.com.
- 5 alt2.aspmx.l.google.com.
- 10 aspmx2.googlemail.com.
- 10 aspmx3.googlemail.com.
- NS
- dns1.registrar-servers.com.
- dns2.registrar-servers.com.
Live preview
This is a live, sandboxed embed of threeplusone.com — not a copy. What it shows can change any time the site itself does.
Domain registration (WHOIS / RDAP)
- Registrar
- NameCheap, Inc.
- Registered
- 2000-11-22
- Expires
- 2026-11-22
- Last changed
- 2025-10-23
Nameservers: DNS1.REGISTRAR-SERVERS.COM, DNS2.REGISTRAR-SERVERS.COM
Status: client transfer prohibited
SSL certificate
Certificate Transparency lookup failed (HTTP 429).
HTTP & security headers
Response
- Server
- cloudflare
- Content-Type
- text/html; charset=utf-8
- Cache-Control
- max-age=600
- Content-Encoding
- Not sent
Security
- Content-Security-Policy
- Not sent
- Strict-Transport-Security
- Not sent
- X-Frame-Options
- Not sent
- X-Content-Type-Options
- Not sent
- Referrer-Policy
- Not sent
- Permissions-Policy
- Not sent
Redirect chain
- 1.
http://threeplusone.com/HTTP 200
Meta tags
- Title
- Gavin E. Crooks
- Description
- The physics of information
- Canonical
- https://threeplusone.com/
- Robots
- Not set
- Generator
- Not set
- Open Graph title
- Gavin E. Crooks
- Open Graph description
- The physics of information
- Open Graph image
- Not set
- Open Graph type
- website
- Twitter card
- Not set
- Twitter title
- Not set
- Twitter image
- Not set
robots.txt
- Disallow rules (User-agent: *)
- 2
- Disallow rules (other agents)
- 0
No Sitemap declared in robots.txt.
Technology detected
Best-effort, based on a small set of well-known signals — this may be incomplete.
- Cloudflarecdn
Server: cloudflare
- Google Analyticsanalytics
Found "googletagmanager.com/gtag/js" in the page's HTML
Related domains
Similar connectivity
Domains ranked just above and below it in the same snapshot.