w3.org

24 hours
100.00%
7 days
100.00%
30 days
100.00%
IPv4 / IPv6
2 2
SSL Certificate
60d
Security Headers
3/6
Badges: Uptime Status
Response Time & Availability (24h)
SSL / TLS Certificate
60
days left
Valid
Mar 13, 2026 Jun 11, 2026
Issued → Expires
Subject commonName=w3.org
Issuer countryName=US, organizationName=Google Trust Services, commonName=WE1
Valid From 2026-03-13 01:44
Expires 2026-06-11 02:44
Serial Number 67C06D1BDCA41BD10EDF9A906C1FB798
SHA-256 Fingerprint f1:3c:49:fe:ad:c5:7b:f1:6f:fe:b5:db:e3:85:e8:3a:69:e1:5f:74:55:02:98:1f:04:ee:91:99:27:31:e9:31
Subject Alt Names w3.org *.w3.org
Last Checked 2026-04-11 22:41:01
Latest HTTP Response Details
Final URL https://www.w3.org/
Status Code 200
Response Time 65 ms
Content Size 50 KB (50.4 KB)
Content Type text/html; charset=UTF-8
Server cloudflare
TLS Version TLSv1.3
TLS Cipher TLS_AES_256_GCM_SHA384
Redirects 1
  1. https://w3.org/
Checked 2026-04-11 22:41:00
Security Headers 3/6
Header Status Value
Strict-Transport-Security Present max-age=15552000; includeSubdomains; preload
Content-Security-Policy Present frame-ancestors 'self' https://cms.w3.org/ https://cms-dev.w3.org/; upgrade-insecure-requests
X-Frame-Options Missing
X-Content-Type-Options Present nosniff
Referrer-Policy Missing
Permissions-Policy Missing
DNS Intelligence (24h)
Avg Resolution
5.4 ms
Min / Max
4.3 / 6.5 ms
Record Types
7
Lookups (24h)
21
DNS Records
A
104.18.22.19 104.18.23.19
300s 6.5ms
AAAA
2606:4700::6812:1713 2606:4700::6812:1613
300s 4.7ms
MX
5 pan.w3.org
5 puck.w3.org
300s 9.1ms
NS
jamie.ns.cloudflare.com pranab.ns.cloudflare.com
86400s 8.6ms
TXT
SPF (1)
v=spf1 mx ip4:34.238.48.92 ip4:34.199.101.240 ip6:2600:1f18:7d7a:2700… v=spf1 mx ip4:34.238.48.92 ip4:34.199.101.240 ip6:2600:1f18:7d7a:2700::/56 include:_spf.google.com ~all
Domain Verification (4)
google-site-verification=CZkSL9bXgKDxRmeDnAQorwhaQy3Ji1vTn36bBn5rL-E
google-site-verification=cu9dn6ytlndLOV87MLxedTHxoKTRKk0dUf_jXK8OsTc
google-site-verification=5TpwKtmzdpa5fntQgKHY96mTJ3FiSn9fGp07XKxFsMk
google-site-verification=dS4IjfXgopxupUFDAqg3wk94IIZ2GuQ-jW4wiLm69Rg
TXT Record (2)
ca3-d6556337888945edac9c159a068c46a2
853C844562
299s 8.1ms
SOA
Primary NS
jamie.ns.cloudflare.com
Admin
dns@cloudflare.com
Serial: 2401256295 Refresh: 2h Retry: 40m Expire: 7d Min TTL: 30m
1800s 5.0ms
CAA
Flag Tag Value
0 issue amazon.com
0 issue pki.goog; cansignhttpexchanges=yes
0 issuewild ssl.com
0 issue digicert.com; cansignhttpexchanges=yes
0 issue comodoca.com
0 iodef mailto:sysreq@w3.org
0 issuewild pki.goog; cansignhttpexchanges=yes
0 issuewild digicert.com; cansignhttpexchanges=yes
0 issuewild letsencrypt.org
0 issue ssl.com
0 issue sectigo.com
0 issuewild sectigo.com
0 issue letsencrypt.org
0 issuewild comodoca.com
299s 10.1ms
Email Security Posture
MX Records
SPF
Details v=spf1 mx ip4:34.238.48.92 ip4:34.199.101.240 ip6:2600:1f18:7d7a:2700::/56 include:_spf.google.com ~all
DMARC
Details v=DMARC1; p=none; rua=mailto:ade5335604f1484dba5c0b11b27d7fce@dmarc-reports.cloudflare.net,mailto:dmarc-rua@w3.org; ruf=mailto:dmarc-ruf@w3.org; fo=1;
BIMI
MTA-STS
Strong
Overall
DNS Propagation Consistent
Resolver IPs Returned Response Time Status
Quad9 104.18.22.19 104.18.23.19 54.69ms
Google 104.18.22.19 104.18.23.19 19.06ms
AdGuard 104.18.22.19 104.18.23.19 44.84ms
OpenDNS 104.18.22.19 104.18.23.19 21.94ms
Cloudflare 104.18.22.19 104.18.23.19 3.93ms
WHOIS / Domain Registration
Registrar
Gandi SAS
Created
1994-07-06
Updated
2025-05-28
Expires
2029-07-05
Name Servers (WHOIS)
jamie.ns.cloudflare.com pranab.ns.cloudflare.com
Domain Status
clientDeleteProhibited clientTransferProhibited
DNSSEC
Unsigned
WHOIS Last Checked
2026-04-11 22:41
Resolution Time (A/AAAA recent)
20:16 22:40
Time Type Values TTL Resolution Nameserver
22:40:59 CAA 0 issue "amazon.com" 0 issue "pki.goog; cansignhttpexchanges=yes" 0 issuewild "ssl.com" 0 issue "digicert.com; cansignhttpexchanges=yes" 0 issue "comodoca.com" 0 iodef "mailto:sysreq@w3.org" 0 issuewild "pki.goog; cansignhttpexchanges=yes" 0 issuewild "digicert.com; cansignhttpexchanges=yes" 0 issuewild "letsencrypt.org" 0 issue "ssl.com" 0 issue "sectigo.com" 0 issuewild "sectigo.com" 0 issue "letsencrypt.org" 0 issuewild "comodoca.com" 299s 10.1 ms 10.89.0.1
22:40:59 SOA jamie.ns.cloudflare.com dns.cloudflare.com 2401256295 10000 2400 604800 1800 1800s 5.0 ms 10.89.0.1
22:40:59 TXT
7 records ca3-d6556337888945edac9c159a068c46a2
ca3-d6556337888945edac9c159a068c46a2 google-site-verification=CZkSL9bXgKDxRmeDnAQorwhaQy3Ji1vTn36bBn5rL-E 853C844562 google-site-verification=cu9dn6ytlndLOV87MLxedTHxoKTRKk0dUf_jXK8OsTc google-site-verification=5TpwKtmzdpa5fntQgKHY96mTJ3FiSn9fGp07XKxFsMk 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=dS4IjfXgopxupUFDAqg3wk94IIZ2GuQ-jW4wiLm69Rg
299s 8.1 ms 10.89.0.1
22:40:59 NS jamie.ns.cloudflare.com pranab.ns.cloudflare.com 86400s 8.6 ms 10.89.0.1
22:40:59 MX 5 pan.w3.org 5 puck.w3.org 300s 9.1 ms 10.89.0.1
22:40:59 AAAA 2606:4700::6812:1713 2606:4700::6812:1613 300s 4.7 ms 10.89.0.1
22:40:59 A 104.18.22.19 104.18.23.19 300s 6.5 ms 10.89.0.1
21:19:14 CAA 0 issuewild "comodoca.com" 0 issue "comodoca.com" 0 issuewild "sectigo.com" 0 issue "ssl.com" 0 issue "pki.goog; cansignhttpexchanges=yes" 0 issuewild "ssl.com" 0 issue "letsencrypt.org" 0 issue "amazon.com" 0 issuewild "letsencrypt.org" 0 issue "digicert.com; cansignhttpexchanges=yes" 0 issuewild "digicert.com; cansignhttpexchanges=yes" 0 iodef "mailto:sysreq@w3.org" 0 issuewild "pki.goog; cansignhttpexchanges=yes" 0 issue "sectigo.com" 299s 10.6 ms 10.89.0.1
21:19:14 SOA jamie.ns.cloudflare.com dns.cloudflare.com 2401256295 10000 2400 604800 1800 1800s 5.2 ms 10.89.0.1
21:19:14 TXT
7 records google-site-verification=5TpwKtmzdpa5fntQgKHY96mT…
google-site-verification=5TpwKtmzdpa5fntQgKHY96mTJ3FiSn9fGp07XKxFsMk google-site-verification=CZkSL9bXgKDxRmeDnAQorwhaQy3Ji1vTn36bBn5rL-E 853C844562 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=dS4IjfXgopxupUFDAqg3wk94IIZ2GuQ-jW4wiLm69Rg google-site-verification=cu9dn6ytlndLOV87MLxedTHxoKTRKk0dUf_jXK8OsTc ca3-d6556337888945edac9c159a068c46a2
299s 10.6 ms 10.89.0.1
21:19:14 NS pranab.ns.cloudflare.com jamie.ns.cloudflare.com 3336s 4.1 ms 10.89.0.1
21:19:14 MX 5 pan.w3.org 5 puck.w3.org 300s 6.0 ms 10.89.0.1
21:19:14 AAAA 2606:4700::6812:1613 2606:4700::6812:1713 300s 6.2 ms 10.89.0.1
21:19:14 A 104.18.23.19 104.18.22.19 300s 5.6 ms 10.89.0.1
20:16:05 CAA 0 issue "pki.goog; cansignhttpexchanges=yes" 0 issue "digicert.com; cansignhttpexchanges=yes" 0 issue "comodoca.com" 0 issue "amazon.com" 0 issuewild "ssl.com" 0 iodef "mailto:sysreq@w3.org" 0 issue "letsencrypt.org" 0 issue "sectigo.com" 0 issuewild "letsencrypt.org" 0 issuewild "pki.goog; cansignhttpexchanges=yes" 0 issuewild "digicert.com; cansignhttpexchanges=yes" 0 issuewild "comodoca.com" 0 issue "ssl.com" 0 issuewild "sectigo.com" 299s 8.0 ms 10.89.0.1
20:16:05 SOA jamie.ns.cloudflare.com dns.cloudflare.com 2401256295 10000 2400 604800 1800 1800s 3.9 ms 10.89.0.1
20:16:05 TXT
7 records google-site-verification=CZkSL9bXgKDxRmeDnAQorwha…
google-site-verification=CZkSL9bXgKDxRmeDnAQorwhaQy3Ji1vTn36bBn5rL-E 853C844562 ca3-d6556337888945edac9c159a068c46a2 google-site-verification=cu9dn6ytlndLOV87MLxedTHxoKTRKk0dUf_jXK8OsTc google-site-verification=5TpwKtmzdpa5fntQgKHY96mTJ3FiSn9fGp07XKxFsMk 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=dS4IjfXgopxupUFDAqg3wk94IIZ2GuQ-jW4wiLm69Rg
299s 7.0 ms 10.89.0.1
20:16:05 NS jamie.ns.cloudflare.com pranab.ns.cloudflare.com 86400s 4.4 ms 10.89.0.1
20:16:05 MX 5 pan.w3.org 5 puck.w3.org 300s 7.1 ms 10.89.0.1
20:16:05 AAAA 2606:4700::6812:1713 2606:4700::6812:1613 300s 4.3 ms 10.89.0.1
20:16:05 A 104.18.23.19 104.18.22.19 300s 5.4 ms 10.89.0.1
Open Ports 12
Open Ports
12
IPs Scanned
12
Port Protocol Service IP Address Status Latency Banner
80 TCP http 2606:4700::6812:1613 Open 4.8 ms
80 TCP http 104.18.23.19 Open 1.9 ms
80 TCP http 2606:4700::6812:1713 Open 4.9 ms
443 TCP https 104.18.23.19 Open 1.7 ms
443 TCP https 2606:4700::6812:1613 Open 5.0 ms
443 TCP https 2606:4700::6812:1713 Open 4.8 ms
8080 TCP http-alt 104.18.23.19 Open 2.1 ms
8080 TCP http-alt 2606:4700::6812:1613 Open 5.6 ms
8080 TCP http-alt 2606:4700::6812:1713 Open 6.4 ms
8443 TCP https-alt 104.18.23.19 Open 3.0 ms
8443 TCP https-alt 2606:4700::6812:1613 Open 5.7 ms
8443 TCP https-alt 2606:4700::6812:1713 Open 6.1 ms
Technology Stack 12 detected
HTTP/2
HTTP/3 (QUIC)
12
Technologies
CDN 1
Cloudflare
90%
CF-Ray header present
DNS 1
Cloudflare DNS
85%
NS record: jamie.ns.cloudflare.com
Email 1
SPF Record
85%
TXT SPF: v=spf1 mx ip4:34.238.48.92 ip4:34.199.101.240 ip6:2600:1f18:7d7a:2700:…
Framework 1
Rails/Django
90%
X-Request-Id header
Monitoring 1
Datadog RUM
70%
Datadog script
Protocol 1
HTTP/3 (QUIC)
90%
Alt-Svc h3 advertised
Security 3
CSP
90%
Content-Security-Policy present
HSTS
90%
HSTS header present
X-Content-Type-Options
90%
nosniff header
Social 2
Open Graph
70%
Open Graph meta tags
Twitter Cards
70%
Twitter Card meta
Verification 1
Google Search Console
85%
TXT verification: google-site-verification=CZkSL9bXgKDxRmeDnAQorwhaQy3Ji1vTn36b…
Crawl Configuration
robots.txt No sitemap
robots.txt 109 disallow · 0 allow · 1 agent
User-Agent Directive Path / Value
* Disallow /*/wp-admin/
* Disallow /*/wp-includes/
* Disallow /*/wp-content/plugins/
* Disallow /*/wp-content/cache/
* Disallow /*/wp-content/themes/
* Disallow /blog/?
* Disallow /blog/*/trackback/
* Disallow /blog/*/feed/
* Disallow /blog/*/comments/
* Disallow /blog/*/category/*/*
* Disallow /blog/*/*/trackback/
* Disallow /blog/*/*/feed/
* Disallow /blog/*/*/comments/
* Disallow /blog/*/*?
* Disallow /community/trackback/
* Disallow /community/feed/
* Disallow /community/comments/
* Disallow /community/category/*/*
* Disallow /community/*/trackback/
* Disallow /community/*/feed/
* Disallow /community/*/comments/
* Disallow /community/*/category/*/*
* Disallow /community/*?
* Disallow /Consortium/Offices/trackback/
* Disallow /Consortium/Offices/feed/
* Disallow /Consortium/Offices/comments/
* Disallow /Consortium/Offices/category/*/*
* Disallow /Consortium/Offices/*/trackback/
* Disallow /Consortium/Offices/*/feed/
* Disallow /Consortium/Offices/*/comments/
* Disallow /Consortium/Offices/*?
* Disallow /wiki/index.php?
* Disallow /wiki/index.php/Help
* Disallow /wiki/index.php/MediaWiki
* Disallow /wiki/index.php/Special:
* Disallow /wiki/index.php/Template
* Disallow /wiki/Special:
* Disallow /wiki/Help:
* Disallow /wiki/Talk:
* Disallow /wiki/skins/
* Disallow /wiki/*/info
* Disallow /wiki/*/edit
* Disallow /wiki/*/history
* Disallow /*/wiki/index.php?
* Disallow /*/wiki/index.php/Help
* Disallow /*/wiki/index.php/MediaWiki
* Disallow /*/wiki/index.php/Special:
* Disallow /*/wiki/index.php/Template
* Disallow /*/wiki/Special:
* Disallow /*/wiki/Help:
* Disallow /*/wiki/Talk:
* Disallow /*/wiki/skins/
* Disallow /*/wiki/*/info
* Disallow /*/wiki/*/edit
* Disallow /*/wiki/*/history
* Disallow /2004/ontaria/basic
* Disallow /Member/
* Disallow /Team/
* Disallow /Project/
* Disallow /Web/
* Disallow /Systems/
* Disallow /Out-Of-Date
* Disallow /2005/06/blog/
* Disallow /2004/08/W3CTalks
* Disallow /2007/11/Talks/search
* Disallow /People/all/
* Disallow /people/all/
* Disallow /People/domain/
* Disallow /people/domain/
* Disallow /RDF/Validator/ARPServlet
* Disallow /RDF/Validator/rdfval
* Disallow /2003/03/Translations/byLanguage
* Disallow /2003/03/Translations/byTechnology
* Disallow /2005/11/Translations/Query
* Disallow /2000/06/webdata/xslt
* Disallow /2000/09/webdata/xslt
* Disallow /2005/08/online_xslt/xslt
* Disallow /Search/Mail/Public/
* Disallow /2006/02/chartergen
* Disallow /2004/01/pp-impl
* Disallow /Consortium/supporters
* Disallow /2012/pyRdfa/extract
* Disallow /2012/pyRdfa/?
* Disallow /WAI/PF/comments/
* Disallow /WAI/events/
* Disallow /participate/conferences.xml
* Disallow /scripts/
* Disallow /2005/01/yacker/
* Disallow /2005/01/yacker?
* Disallow /2005/07/pubrules?
* Disallow /ns/hydra/console/?
* Disallow /2007/08/grddl/?
* Disallow /2009/07/webidl-check?
* Disallow /RDF/Validator/ARPServlet?
* Disallow /2000/06/webdata/xsv?
* Disallow /2000/09/webdata/xsv?
* Disallow /2007/10/htmldiff?
* Disallow /Style/CSS/members.be/
* Disallow /services
* Disallow /2021/05/view-gallery/
* Disallow /International/questions/qa-html-language-declarations/icons/
* Disallow /International/questions/qa-html-language-declarations/qa-html-language-declarations-data/icons/
* Disallow /*,*
* Disallow /WAI/beta/
* Disallow /WAI/ut1/
* Disallow /WAI/ut2/
* Disallow /WAI/ut3/
* Disallow /WAI/ut4/
* Disallow /WAI/drafts/
#
# robots.txt for https://www.w3.org/
#
# $Id: robots.txt,v 1.104 2026/02/16 05:12:36 gerald Exp $
#

# the following settings apply to all bots
User-agent: *
# Blogs - WordPress
# https://wordpress.org/documentation/article/search-engine-optimization/#robots-txt-optimization
Disallow: /*/wp-admin/
Disallow: /*/wp-includes/
Disallow: /*/wp-content/plugins/
Disallow: /*/wp-content/cache/
Disallow: /*/wp-content/themes/
Disallow: /blog/?
Disallow: /blog/*/trackback/
Disallow: /blog/*/feed/
Disallow: /blog/*/comments/
Disallow: /blog/*/category/*/*
Disallow: /blog/*/*/trackback/
Disallow: /blog/*/*/feed/
Disallow: /blog/*/*/comments/
Disallow: /blog/*/*?
Disallow: /community/trackback/
Disallow: /community/feed/
Disallow: /community/comments/
Disallow: /community/category/*/*
Disallow: /community/*/trackback/
Disallow: /community/*/feed/
Disallow: /community/*/comments/
Disallow: /community/*/category/*/*
Disallow: /community/*?
Disallow: /Consortium/Offices/trackback/
Disallow: /Consortium/Offices/feed/
Disallow: /Consortium/Offices/comments/
Disallow: /Consortium/Offices/category/*/*
Disallow: /Consortium/Offices/*/trackback/
Disallow: /Consortium/Offices/*/feed/
Disallow: /Consortium/Offices/*/comments/
Disallow: /Consortium/Offices/*?
# Wikis - Mediawiki
# https://www.mediawiki.org/wiki/Manual:Robots.txt
Disallow: /wiki/index.php?
Disallow: /wiki/index.php/Help
Disallow: /wiki/index.php/MediaWiki
Disallow: /wiki/index.php/Special:
Disallow: /wiki/index.php/Template
Disallow: /wiki/Special:
Disallow: /wiki/Help:
Disallow: /wiki/Talk:
Disallow: /wiki/skins/
Disallow: /wiki/*/info
Disallow: /wiki/*/edit
Disallow: /wiki/*/history
Disallow: /*/wiki/index.php?
Disallow: /*/wiki/index.php/Help
Disallow: /*/wiki/index.php/MediaWiki
Disallow: /*/wiki/index.php/Special:
Disallow: /*/wiki/index.php/Template
Disallow: /*/wiki/Special:
Disallow: /*/wiki/Help:
Disallow: /*/wiki/Talk:
Disallow: /*/wiki/skins/
Disallow: /*/wiki/*/info
Disallow: /*/wiki/*/edit
Disallow: /*/wiki/*/history
# various other access-controlled or expensive areas
Disallow: /2004/ontaria/basic
Disallow: /Member/
Disallow: /Team/
Disallow: /Project/
Disallow: /Web/
Disallow: /Systems/
Disallow: /Out-Of-Date
Disallow: /2005/06/blog/
Disallow: /2004/08/W3CTalks
Disallow: /2007/11/Talks/search
Disallow: /People/all/
Disallow: /people/all/
Disallow: /People/domain/
Disallow: /people/domain/
Disallow: /RDF/Validator/ARPServlet
Disallow: /RDF/Validator/rdfval
Disallow: /2003/03/Translations/byLanguage
Disallow: /2003/03/Translations/byTechnology
Disallow: /2005/11/Translations/Query
Disallow: /2000/06/webdata/xslt
Disallow: /2000/09/webdata/xslt
Disallow: /2005/08/online_xslt/xslt
Disallow: /Search/Mail/Public/
Disallow: /2006/02/chartergen
Disallow: /2004/01/pp-impl
Disallow: /Consortium/supporters
Disallow: /2012/pyRdfa/extract
Disallow: /2012/pyRdfa/?
Disallow: /WAI/PF/comments/
Disallow: /WAI/events/
Disallow: /participate/conferences.xml
Disallow: /scripts/
Disallow: /2005/01/yacker/
Di…
Sitemap

No sitemap discovered.
Checked /robots.txt, /sitemap.xml, and /sitemap_index.xml

Active IP Addresses
IP Address Version Reverse DNS CIDR Country City ASN First Seen Last DNS Hits Misses Uptime % Avg Latency
2606:4700::6812:1713 IPv6 2606:4700::/48 AS13335 Cloudflare, Inc. 2026-04-11 20:16 2026-04-11 22:40 3 0 100.0% 2.9 ms
2606:4700::6812:1613 IPv6 2606:4700::/48 AS13335 Cloudflare, Inc. 2026-04-11 20:16 2026-04-11 22:40 3 0 100.0% 3.6 ms
104.18.23.19 IPv4 104.18.23.0/24 AS13335 Cloudflare, Inc. 2026-04-11 20:16 2026-04-11 22:40 3 0 100.0% 3.1 ms
104.18.22.19 IPv4 104.18.22.0/24 AS13335 Cloudflare, Inc. 2026-04-11 20:16 2026-04-11 22:40 3 0 100.0% 3.1 ms
Discovered Sub-domains 17
Wordlist Brute-force 17

1. api.w3.org
2. auth.w3.org
3. cms.w3.org
4. dev.w3.org
5. frontend.w3.org
6. gw.w3.org
7. imap.w3.org
8. irc.w3.org
9. ldap.w3.org
10. media.w3.org
11. services.w3.org
12. smtp.w3.org
13. status.w3.org
14. tag.w3.org
15. vpn.w3.org
16. webmail.w3.org
17. www.w3.org
Recent HTTP Checks (24 h)
Total Checks
3
Success Rate
100%
Avg Response
65 ms
Min / Max
51 / 78 ms
Recent Checks
20:16 22:41
Time Status Code Response Agent Error
22:41:00 UP 200 65 ms prod-local
21:19:16 UP 200 78 ms prod-local
20:16:06 UP 200 51 ms prod-local
Incident History

No incidents recorded — all clear!