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Domain report

progressbar.tw

progressbar.tw ranks in the top 0.44% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 1 distinct host observed under it.

Explore progressbar.tw in the Web Graph

Connectivity

#587,276harmonic-centrality rank
Top percentile
0.44%
Hosts observed
1

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

200HTTP status

https://progressbar.tw/ answered with HTTP 200.

DNS records

A
  • 172.67.178.158
  • 104.21.17.224
AAAA
  • 2606:4700:3032::6815:11e0
  • 2606:4700:3030::ac43:b29e
MX
  • 1 aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
  • 5 alt1.aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
NS
  • lynn.ns.cloudflare.com.
  • sharon.ns.cloudflare.com.

Live preview

This is a live, sandboxed embed of progressbar.tw — not a copy. What it shows can change any time the site itself does.

Domain registration (WHOIS / RDAP)

Registrar
GoDaddy
Registered
2017-03-10
Expires
2028-03-10
Last changed
2026-02-14

Nameservers: lynn.ns.cloudflare.com, sharon.ns.cloudflare.com

Status: client renew prohibited, client update prohibited, client delete prohibited, client transfer prohibited

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=utf-8
Cache-Control
private, no-cache, no-store, max-age=0, must-revalidate
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

What each security header does

Redirect chain

  1. 1.http://progressbar.tw/HTTP 301

    → https://progressbar.tw/

  2. 2.https://progressbar.tw/HTTP 200

Meta tags

Title
進度條線上課程 Progress Bar
Description
最準確的網頁程式線上課程，讓你在最精簡的時間學會所有你該學會的技術，讓您的職涯更進一步。
Canonical
Not set
Robots
Not set
Generator
Not set
Open Graph title
進度條線上課程 Progress Bar
Open Graph description
最準確的網頁程式線上課程，讓你在最精簡的時間學會所有你該學會的技術，讓您的職涯更進一步。
Open Graph image
https://progressbar.tw/images/home/progress_bar_icon.png
Open Graph type
website
Twitter card
summary_large_image
Twitter title
進度條線上課程 Progress Bar
Twitter image
https://progressbar.tw/images/home/progress_bar_icon.png

robots.txt

Disallow rules (User-agent: *)
7
Disallow rules (other agents)
0

Sitemap declared:

  • https://progressbar.tw/sitemap.xml

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

  • Cloudflarecdn

    Server: cloudflare

  • Next.jsframework

    X-Powered-By: Next.js

  • 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.