What powers celestrak.org?
Last seen Aug 2026 · 7 technologies across 7 categories
JavaScript libraries
Miscellaneous
Operating systems
Programming languages
UI frameworks
Web servers
Webmail
AI Crawlers
Blocks 1 of 33 AI crawlers we track by name in its robots.txt. Checked Sep 2026.
Training crawlers
- ClaudeBot Blocked
The other 32 AI crawlers we track are not mentioned and only inherit the catch-all rules that apply to every crawler.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| celestrak | #1 | 300 |
| sat track | #10 | 38 |
| celestrak tle | #1 | 27 |
| two line element set | #25 | 17 |
| satellite tracking program | #3 | 17 |
| tle data | #2 | 15 |
| norad two-line elements | #1 | 12 |
| sattrack | #43 | 11 |
| satellite tracker | #36 | 11 |
| tle wikipedia | #3 | 9 |
| norad tracking satellite | #3 | 9 |
| geo orbit | #38 | 9 |
| geostationary orbit | #41 | 9 |
| satellite tle | #2 | 8 |
| sat cat | #4 | 7 |
| satellite tracking software | #5 | 7 |
| us space surveillance network | #8 | 6 |
| satellite tle database | #2 | 6 |
| norad tle | #1 | 6 |
| iridium 33 | #4 | 6 |
| gso orbit | #39 | 6 |
| tle two-line element | #2 | 5 |
| two line element format | #2 | 5 |
| norad satellite tracking | #4 | 5 |
| iridium cosmos collision | #5 | 5 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
1 of 33 AI crawlers blocked
Audience
- 76% desktop
- 24% phone
United States
India
Japan
France
Italy
Germany
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.25 / 10 · ranked #92,553 of all domains
196 referring domains · OpenPageRank
Search traffic
610 est. monthly organic visits (US)
171 keywords in Google's top 30
Core Web Vitals
| LCP | 1.7 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 1000 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.3 MB · 11 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- CelesTrak
- Founded: 1985
- Country: United States
From Wikidata (CC0).
Infrastructure
- Hosted on HOSTWINDS (104.168.149.178)
- DNS: Namecheap
- Email: Google Workspace
- Email security: no SPF record, DMARC monitor only
- SSL: Sectigo, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 433,073, 2 hosts
- Verified with: Google
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| celestrak.org | 7 |
| www.celestrak.org | 7 |
Full technology history →
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Recent changes
- dropped PayPal May 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025