Check-Host.cc

Domain

matrix.org

Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.

Run a live full scan of matrix.org

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
Hosting IPs
10
A/AAAA targets
Subdomains
62
CT + scan + body
Record Types
6
seen in DNS
Observed Certs
14
in our scans

DNS Records

A
172.66.135.3, 172.66.139.239
AAAA
2606:4700:10::ac42:8703, 2606:4700:10::ac42:8bef
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
derek.ns.cloudflare.com, laura.ns.cloudflare.com
TXT
google-site-verification=8RMxuwfmm-wPif3Tvs3hWOlsoMgVXHT-mpHMTepW27E, google-site-verification=EBNpQSVGNJCUkEzbk2vt2BLvvRHoIlgp4C48fBlZyLQ, google-site-verification=J8_DjdsqBAPelUR1VXSV4jj4hX_ZfnWae_khwjr55wY, google-site-verification=WtVGAosO4JrjN_QGtENIbAEMcy5Dk7t6hcC4yQ5KC7A, google-site-verification=YHOeBO5suOmGyGWX9dhGZEv2cUW5ggwJecams7zaPvg, v=spf1 mx include:mail.zendesk.com include:amazonses.com include:_spf.google.com ip4:94.237.52.96 ip6:2a04:3541:1000:500:6866:a4ff:fe4c:7cce -all
CNAME
CAA

WHOIS / Registration

Registration data planned

Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.

Subdomains

Subdomain enumeration pending

Every subdomain ever issued a TLS cert under this apex — extracted from Certificate Transparency logs, our own scan observations and body references.

Tech Stack

Tech detection pending

Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.

TLS Certificates

Subject: meet.seattlematrix.org
Issuer: YR2
SANs: meet.seattlematrix.org
Subject: prometheus.matrix.org
Issuer: YR2
SANs: alertmanager.matrix.org, grafana.matrix.org, prometheus.matrix.org
Subject: mazzelmatrix.org
Issuer: YE1
SANs: mazzelmatrix.org, www.mazzelmatrix.org
Subject: *.astromatrix.org
Issuer: Sectigo RSA Organization Validation Secure Server CA
SANs: *.astromatrix.org, astromatrix.org
Subject: basedmatrix.org
Issuer: E7
SANs: basedmatrix.org, www.basedmatrix.org
Subject: leadmatrix.org
Issuer: E8
SANs: leadmatrix.org, www.leadmatrix.org
Subject: *.communicationmatrix.org
Issuer: Sectigo Public Server Authentication CA DV R36
SANs: *.communicationmatrix.org, communicationmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: www.classmatrix.org
Issuer: Amazon RSA 2048 M01
SANs: www.classmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: meet.seattlematrix.org
Issuer: R12
SANs: meet.seattlematrix.org
Subject: northmatrix.org
Issuer: E8
SANs: element.northmatrix.org, matrix.northmatrix.org, northmatrix.org
Subject: relay.ucmatrix.org
Issuer: E8
SANs: relay.ucmatrix.org
Subject: www.classmatrix.org
Issuer: Amazon RSA 2048 M01
SANs: www.classmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: antimatrix.org
Issuer: R12
SANs: antimatrix.org, www.antimatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: prometheus.matrix.org
Issuer: R13
SANs: alertmanager.matrix.org, grafana.matrix.org, prometheus.matrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: breakoutofthematrix.org
Issuer: E8
SANs: breakoutofthematrix.org, www.breakoutofthematrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org
Subject: *.unlockmatrix.org
Issuer: E8
SANs: *.unlockmatrix.org, unlockmatrix.org

IPs Citing This Domain

Hosts whose HTML body references this domain. Strong signal for origin/mirror/embed discovery.

83.136.255.76:443 href · ×6
190.92.218.160:80 href · ×4
143.198.204.61:443 href · ×3
47.243.220.78:443 href · ×2
47.243.216.195:443 href · ×2
185.150.4.216:443 href · ×2
143.244.161.192:443 href · ×2
167.114.209.208:443 href · ×2
91.99.231.95:8080 href · ×2
176.124.37.34:443 href · ×2
176.9.7.222:443 href · ×2
152.53.118.66:443 href · ×1
82.66.4.66:8008 href · ×1
82.165.24.125:443 href · ×1
54.202.124.80:443 href · ×1
159.198.47.166:443 href · ×1
141.95.150.227:8080 href · ×1
173.31.99.210:443 href · ×1
159.69.25.2:443 href · ×1
147.135.253.233:8000 href · ×1
89.116.220.78:80 href · ×1
137.184.42.39:80 href · ×1
92.252.241.248:443 href · ×1
217.154.147.143:80 href · ×1
159.198.47.166:80 href · ×1
144.31.76.78:443 href · ×1
89.42.59.37:80 href · ×1
82.25.190.131:443 href · ×1
149.56.241.130:443 href · ×1
177.23.13.64:8008 href · ×1
93.230.49.185:80 href · ×1
46.62.255.237:443 href · ×1
98.212.145.197:80 href · ×1
46.101.215.121:443 href · ×1
217.154.147.143:443 href · ×1
82.66.104.155:443 href · ×1
155.248.199.38:443 href · ×1
80.78.27.235:443 href · ×1
73.31.48.94:443 href · ×1
188.166.205.127:9443 href · ×1
23.157.120.14:443 href · ×1

Origin / IP-Leak

USP

When a hostname is served behind a CDN (e.g. Cloudflare), the origin server can sometimes be identified by matching its TLS cert against the protected hostname. Findings shown here are heuristic candidates, not guarantees.

No origin-IP leaks detected (yet)

Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.

Threat Intelligence

Domain threat-intel pending

Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.

History

Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.

Type Value First seen Last seen
TXT google-site-verification=WtVGAosO4JrjN_QGtENIbAEMcy5Dk7t6hcC4yQ5KC7A 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
TXT google-site-verification=EBNpQSVGNJCUkEzbk2vt2BLvvRHoIlgp4C48fBlZyLQ 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
NS derek.ns.cloudflare.com 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
TXT google-site-verification=YHOeBO5suOmGyGWX9dhGZEv2cUW5ggwJecams7zaPvg 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
SRV _matrix._tcp 10 5 8443 matrix-federation.matrix.org.cdn.cloudflare.net 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
AAAA 2606:4700:10::ac42:8bef 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
SRV _xmpp-server._tcp 0 5 5269 lethe.matrix.org 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
TXT google-site-verification=J8_DjdsqBAPelUR1VXSV4jj4hX_ZfnWae_khwjr55wY 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
TXT google-site-verification=8RMxuwfmm-wPif3Tvs3hWOlsoMgVXHT-mpHMTepW27E 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
NS laura.ns.cloudflare.com 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
A 172.66.135.3 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
SRV _xmpp-client._tcp 0 5 5222 lethe.matrix.org 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
MX 5 alt2.aspmx.l.google.com 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
MX 10 alt4.aspmx.l.google.com 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
MX 1 aspmx.l.google.com 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
TXT v=spf1 mx include:mail.zendesk.com include:amazonses.com include:_spf.google.com ip4:94.237.52.96 ip6:2a04:3541:1000:500:6866:a4ff:fe4c:7cce -all 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
AAAA 2606:4700:10::ac42:8703 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
MX 5 alt1.aspmx.l.google.com 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
A 172.66.139.239 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459
MX 10 alt3.aspmx.l.google.com 2026-05-26 00:07:44.959 2026-07-28 18:27:17.459