Open Authority Rating
opensource.org
68/100
- Harmonic centrality rank
- #337
- PageRank rank
- #575
- Crawled hosts
- 21
- Crawl release
- cc-main-2026-jun-jul-aug
- Last computed
- Aug 31, 2026
Stronger than 99.99% of the 119,722,885 ranked domains (by harmonic centrality).
About this domain
- Registered
- Feb 11, 1998
- Registrar
- Gandi SAS
- Registration expires
- Feb 10, 2027
- Hosting country
- US
- Hosting provider
- CLOUDFLARENET
- IPv6
- yes (AAAA)
- Email (MX)
- yes
- Nameservers
- alice.ns.cloudflare.com, arturo.ns.cloudflare.com
- TLS certificate
- Google Trust Services
- Certificate valid until
- Nov 10, 2026
- Homepage
- HTTP 200
- Page title
- Open Source Initiative – The steward of the Open Source Definition, setting the foundation for the Open Source Software ecosystem.
- Declared language
- en-us
Sources & freshness
- Registration: via rdap:rdap.publicinterestregistry.org, fetched Aug 29, 2026
- DNS: via doh, fetched Aug 29, 2026
- Hosting (IP→ASN): via iptoasn.com, fetched Aug 29, 2026
- TLS: via tls-handshake, fetched Aug 29, 2026
- Homepage: via homepage-fetch, fetched Aug 29, 2026
Facts we can’t prove are shown as unavailable — never estimated. Data refreshes roughly monthly.
OAR across crawl releases
| Crawl release | OAR |
|---|---|
| cc-main-2026-apr-may-jun | 70 |
| cc-main-2026-may-jun-jul | 69 |
| cc-main-2026-jun-jul-aug | 68 |
Dashed marks are crawl releases where opensource.org wasn’t in the link graph; gaps are shown honestly, never interpolated.