Domain report
efficient.app
efficient.app ranks in the top 0.48% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 9 distinct hosts observed under it.
Connectivity
#643,058harmonic-centrality rank
- Top percentile
- 0.48%
- Hosts observed
- 9
From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means
HTTPS reachability
429HTTP status
https://efficient.app/ answered with HTTP 429.
DNS records
- A
- 216.150.1.1
- 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
- amit.ns.cloudflare.com.
- jule.ns.cloudflare.com.
Live preview
This is a live, sandboxed embed of efficient.app — not a copy. What it shows can change any time the site itself does.
Domain registration (WHOIS / RDAP)
RDAP lookup failed (HTTP 429).
SSL certificate
Certificate Transparency lookup failed (HTTP 429).
HTTP & security headers
Response
- Server
- cloudflare
- Content-Type
- text/html; charset=utf-8
- Cache-Control
- private, no-store, max-age=0
- 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://efficient.app/HTTP 308→ https://efficient.app/
- 2.
https://efficient.app/HTTP 429
Meta tags
- Title
- Vercel Security Checkpoint
- Description
- Not set
- Canonical
- Not set
- Robots
- Not set
- Generator
- Not set
- Open Graph title
- Not set
- Open Graph description
- Not set
- Open Graph image
- Not set
- Open Graph type
- Not set
- Twitter card
- Not set
- Twitter title
- Not set
- Twitter image
- Not set
robots.txt
robots.txt request failed (HTTP 429).
Technology detected
Best-effort, based on a small set of well-known signals — this may be incomplete.
- Cloudflarecdn
Server: cloudflare
Related domains
Similar connectivity
Domains ranked just above and below it in the same snapshot.