Domain · Tranco #181

w3.org

w3.org is ranked #181 among the world's most-visited sites (Tranco). It resolves to 104.18.23.19, hosted on cloudflare, and presents a TLS certificate issued by Google Trust Services.

HTTP 301

Tranco rank	#181
IPv4	104.18.23.19, 104.18.22.19
IPv6	2606:4700::6812:1713, 2606:4700::6812:1613
Hosting / reverse DNS	cloudflare
Nameservers	jamie.ns.cloudflare.com, pranab.ns.cloudflare.com
Mail servers (MX)	puck.w3.org (5), pan.w3.org (5)
HTTP status	301 → https://www.w3.org/
Web server	cloudflare
Detected tech	cloudflare, Cloudflare
TLS certificate	Google Trust Services · expires 2026-10-07

Notable DNS TXT records

google-site-verification=CZkSL9bXgKDxRmeDnAQorwhaQy3Ji1vTn36bBn5rL-E
google-site-verification=5TpwKtmzdpa5fntQgKHY96mTJ3FiSn9fGp07XKxFsMk
google-site-verification=dS4IjfXgopxupUFDAqg3wk94IIZ2GuQ-jW4wiLm69Rg
anthropic-domain-verification-xwqnyg=KpEpoEkHUmXnsWC0mhnfKFBrr
v=spf1 mx ip4:34.238.48.92 ip4:34.199.101.240 ip6:2600:1f18:7d7a:2700::/56 include:_spf.google.com ~all
google-site-verification=cu9dn6ytlndLOV87MLxedTHxoKTRKk0dUf_jXK8OsTc

More .org domains

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FAQ

What is the IP address of w3.org?

w3.org resolves to 104.18.23.19, 104.18.22.19 (cloudflare).

Who issued the SSL certificate for w3.org?

The TLS/SSL certificate for w3.org was issued by Google Trust Services, valid until 2026-10-07.

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DNS/HTTP/TLS observed 2026-08-06; registration data via RDAP. Informational only. Download JSON · CSV · Browse domains