Check-Host.cc

Try 1.1.1.1 AS13335 check-host.cc /country/de /tld/cc
Domain

linux.do

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

DNS Check HTTP Check Run Full Scan .do TLD

Run a live full scan of linux.do

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
—
A/AAAA targets
Subdomains
—
CT + scan + body
Record Types
—
seen in DNS
Observed Certs
—
in our scans

DNS Records

A
104.20.16.234, 172.66.166.61
AAAA
2606:4700:10::6814:10ea, 2606:4700:10::ac42:a63d
MX
10 mail.linuxdo.org, 5 mail.linux.do
NS
dahlia.ns.cloudflare.com, marek.ns.cloudflare.com
TXT
google-site-verification=dXFnJHavazXf0Czwwn70iSIW1U26O7ZrGWiuPFY5RL4, stripe-verification=d86ad55b4aeb3926892d8b9bbd8f89af18cc0a5d2aaaa45c4a931a644c047d07, v=spf1 include:_spf.smtp.do a:mail.linux.do -all
CNAME
—
CAA
0 issue "comodoca.com", 0 issue "digicert.com; cansignhttpexchanges=yes", 0 issue "letsencrypt.org", 0 issue "pki.goog; cansignhttpexchanges=yes", 0 issue "ssl.com", 0 issuewild "comodoca.com", 0 issuewild "digicert.com; cansignhttpexchanges=yes", 0 issuewild "letsencrypt.org"

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

Every subdomain we know about — harvested from CT-log SANs, scan-observed certs and HTML body references — paired with its current A/AAAA target.

Subdomain Resolves to Last seen
check.linux.do
104.20.16.234 172.66.166.61 2606:4700:10::ac42:a63d 2606:4700:10::6814:10ea
2026-06-16 16:21:09.234
connect.linux.do
104.20.16.234 172.66.166.61 2606:4700:10::ac42:a63d 2606:4700:10::6814:10ea
2026-07-22 14:15:47.566
linux.do
104.20.16.234 2606:4700:10::6814:10ea 2606:4700:10::ac42:a63d 172.66.166.61
2026-07-28 17:13:52.071
nav.linux.do
172.66.166.61 104.20.16.234 2606:4700:10::6814:10ea 2606:4700:10::ac42:a63d
2026-07-22 14:15:47.566
pow.linux.do
172.66.166.61 104.20.16.234 2606:4700:10::ac42:a63d 2606:4700:10::6814:10ea
2026-06-24 02:56:20.780
ads.linux.do
1970-01-01 00:00:00.000
autodiscover.linux.do
1970-01-01 00:00:00.000
cdk.linux.do
1970-01-01 00:00:00.000
docker-gcr.linux.do
1970-01-01 00:00:00.000
docker-ghcr.linux.do
1970-01-01 00:00:00.000
docker-hub.linux.do
1970-01-01 00:00:00.000
docker-ui.linux.do
1970-01-01 00:00:00.000
lottery.linux.do
1970-01-01 00:00:00.000
mta-sts.linux.do
1970-01-01 00:00:00.000
rate.linux.do
1970-01-01 00:00:00.000
uptime.linux.do
1970-01-01 00:00:00.000
webmail.linux.do
1970-01-01 00:00:00.000
wiki.linux.do
1970-01-01 00:00:00.000
www.linux.do
1970-01-01 00:00:00.000

Tech Stack

Tech detection pending

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

TLS Certificates

Certificate observations pending

TLS certs naming this domain in subject or SANs will appear here as our scan-layer catches them.

IPs Citing This Domain

No citing IPs found yet

As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.

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 stripe-verification=d86ad55b4aeb3926892d8b9bbd8f89af18cc0a5d2aaaa45c4a931a644c047d07 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
TXT v=spf1 include:_spf.smtp.do a:mail.linux.do -all 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
TXT google-site-verification=dXFnJHavazXf0Czwwn70iSIW1U26O7ZrGWiuPFY5RL4 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
A 104.20.16.234 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
MX 10 mail.linuxdo.org 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
AAAA 2606:4700:10::6814:10ea 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
NS dahlia.ns.cloudflare.com 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
AAAA 2606:4700:10::ac42:a63d 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issue "ssl.com" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issuewild "digicert.com; cansignhttpexchanges=yes" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issuewild "ssl.com" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
MX 5 mail.linux.do 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
A 172.66.166.61 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
SRV _autodiscover._tcp 10 1 443 _dc-srv.6c7d7b05fffb._autodiscover._tcp.linux.do 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issue "digicert.com; cansignhttpexchanges=yes" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
NS marek.ns.cloudflare.com 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issuewild "comodoca.com" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issuewild "letsencrypt.org" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issuewild "pki.goog; cansignhttpexchanges=yes" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issue "letsencrypt.org" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issue "comodoca.com" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071
CAA 0 issue "pki.goog; cansignhttpexchanges=yes" 2026-05-26 02:30:04.450 2026-07-28 17:13:52.071