Check-Host.cc

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

tailscale.com

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

DNS Check HTTP Check Run Full Scan .com TLD

Run a live full scan of tailscale.com

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
326
A/AAAA targets
Subdomains
317
CT + scan + body
Record Types
6
seen in DNS
Observed Certs
11
in our scans

DNS Records

A
76.76.21.21
AAAA
2600:9000:a51d:27c1:6748:d035:a989:fb3c, 2600:9000:a602:b1e6:5b89:50a1:7cf7:67b8
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
ns-1359.awsdns-41.org, ns-1558.awsdns-02.co.uk, ns-197.awsdns-24.com, ns-557.awsdns-05.net
TXT
723757a747, MS=34DDD317D9FEB51560ED2178552EF5F487EFDA34, MS=ms19736920, MS=ms46037000, anthropic-domain-verification-vpgx4y=uwN6CwOz0NQijKYGDthCAEt9C, asv=c034fa773cb1b431402a28453995174d, atlassian-domain-verification=nffRaFBNr1PtD33kaEsaD9CvW1YDeLVUva1REQBQXomao5ORxyNOYh8uEBKGJXt1, atlassian-sending-domain-verification=8ec3fea9-480e-4fea-ad9d-b8106e2f47bd
CNAME
—
CAA
0 issue "amazon.com", 0 issue "amazonaws.com", 0 issue "amazontrust.com", 0 issue "awstrust.com", 0 issue "comodoca.com", 0 issue "digicert.com", 0 issue "letsencrypt.org", 0 issuewild ";"

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

1.94.196.51:443 dcae35d5111c…
Subject: controlplane.tailscale.com
Issuer: YE1
SANs: controlplane.tailscale.com
52.198.218.196:443 f223d4f312bc…
Subject: tailscale.com
Issuer: Amazon RSA 2048 M04
SANs: tailscale.com, ts.net, www.tailscale.com
107.23.70.210:443 7953ad5218e2…
Subject: tailscale.com
Issuer: Amazon RSA 2048 M04
SANs: tailscale.com, ts.net, www.tailscale.com
63.184.38.7:443 aa314fef63ff…
Subject: tailscale.com
Issuer: Amazon RSA 2048 M04
SANs: tailscale.com, ts.net, www.tailscale.com
46.243.1.58:443 872a81b16575…
Subject: login.tailscale.com
Issuer: login.tailscale.com
SANs: login.tailscale.com
3.68.11.43:443 d3a51c23a4dd…
Subject: usage.tailscale.com
Issuer: Amazon RSA 2048 M04
SANs: usage.tailscale.com
54.206.89.175:443 648f2ab05d6d…
Subject: tailscale.com
Issuer: Amazon RSA 2048 M01
SANs: tailscale.com, ts.net, www.tailscale.com
76.223.15.28:443 aa314fef63ff…
Subject: tailscale.com
Issuer: Amazon RSA 2048 M04
SANs: tailscale.com, ts.net, www.tailscale.com
18.229.108.165:443 a880f32faa55…
Subject: tailscale.com
Issuer: Amazon RSA 2048 M04
SANs: tailscale.com, ts.net, www.tailscale.com

IPs Citing This Domain

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

158.101.207.42:443 href · ×8
87.106.96.15:443 href · ×7
49.233.180.222:443 href · ×6
65.49.217.115:443 href · ×6
123.56.64.134:443 href · ×4
49.235.139.166:443 href · ×4
38.38.251.165:443 href · ×4
39.96.194.21:8443 href · ×4
8.138.41.159:443 href · ×4
119.29.83.70:443 href · ×4
150.109.231.166:443 href · ×4
49.234.21.26:80 href · ×4
140.143.87.45:443 href · ×4
47.101.36.72:443 href · ×4
47.102.198.145:443 href · ×4
115.190.79.92:443 href · ×4
14.153.160.250:8443 href · ×4
8.148.205.25:8443 href · ×4
47.93.166.162:443 href · ×4
47.103.199.212:443 href · ×4
118.25.78.169:443 href · ×4
124.223.114.43:8443 href · ×4
121.196.235.179:443 href · ×4
140.143.163.243:443 href · ×4
128.254.224.12:8088 href · ×4
114.215.147.153:443 href · ×4
212.47.246.87:443 href · ×4
124.223.106.182:8443 href · ×4
92.53.101.144:443 href · ×4
3.218.173.44:443 href · ×4
45.136.13.174:443 href · ×4
123.60.50.130:443 href · ×4
124.221.39.157:443 href · ×4
60.205.190.123:443 href · ×4
43.163.6.174:443 href · ×4
124.222.87.26:8443 href · ×4
120.27.155.134:443 href · ×4
49.234.180.224:443 href · ×4
23.111.15.185:443 href · ×4
38.147.185.200:443 href · ×4
124.221.97.232:443 href · ×4
82.156.62.232:443 href · ×4
8.136.39.150:8443 href · ×4
101.200.50.231:443 href · ×4
43.134.81.144:443 href · ×4
8.141.111.56:443 href · ×4
69.165.68.146:443 href · ×4
47.100.5.149:443 href · ×4
182.92.112.17:443 href · ×4
47.116.38.18:443 href · ×4

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
AAAA 2600:9000:a51d:27c1:6748:d035:a989:fb3c 2026-05-25 22:00:50.546 2026-07-28 19:02:52.609
AAAA 2600:9000:a602:b1e6:5b89:50a1:7cf7:67b8 2026-05-25 22:00:50.546 2026-07-28 19:02:52.609
A 76.76.21.21 2026-05-25 22:00:50.546 2026-07-28 19:02:52.609
NS ns-557.awsdns-05.net 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT google-site-verification=FdhZ5m0ygy7zoBLQNWvqJ3v0wQop9dTu5ZHYvojZlPE 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT 723757a747 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT stripe-verification=d1e4db8d6a928fe01eaf24de20ea7dc4c6ebc1fa91940e3a6a0cc59082025114 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT stripe-verification=a72a667972336ba404d79c4c29f31c0e9226e2260da4c6a4c7dce3af1ec200ca 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT google-site-verification=aISd8KPh1T5nM6tv78IhxrYXTvLqrjMLcOsV6tDc9xw 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT stripe-verification=5fcd1c876b6a81bf6ec1888417271c54c1a7186b90e858e181224cc31b2c93ce 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT docker-verification=3d97b1d0-f13c-49a5-a608-a4e126994fb2 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT MS=34DDD317D9FEB51560ED2178552EF5F487EFDA34 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT atlassian-sending-domain-verification=8ec3fea9-480e-4fea-ad9d-b8106e2f47bd 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT anthropic-domain-verification-vpgx4y=uwN6CwOz0NQijKYGDthCAEt9C 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT stripe-verification=0ba99cfebb16921aa06471ec2581cf92c47b39cb15a8877a174bb78829e18603 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT hubspot-domain-verification=ZjA2YWQ4OGMtYTJmMi00NGM3LWJkM2ItZGNjNjYwY2I1NTQ2 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT MS=ms19736920 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT notion-domain-verification=5N4i2ZyFxTIAh8yjBjVknqRdZp9BFylUmFFV3h6M3sg 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT figma-domain-verification=1c2de6e8a2ed198f2e74b79eb341b1e7fa0c2f8f77d967c3df1a34dc7b1b9392-1727189921 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT asv=c034fa773cb1b431402a28453995174d 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT openai-domain-verification=dv-3qK0xjzrDgu9vT3wfpM2P0g2 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT MS=ms46037000 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT google-site-verification=uvcAEZ3qnz0lx7zpKE9DMg7FqYBSPuVK61d7zlxew3g 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
NS ns-197.awsdns-24.com 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
NS ns-1558.awsdns-02.co.uk 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
MX 10 alt3.aspmx.l.google.com 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
MX 5 alt2.aspmx.l.google.com 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT atlassian-domain-verification=nffRaFBNr1PtD33kaEsaD9CvW1YDeLVUva1REQBQXomao5ORxyNOYh8uEBKGJXt1 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
MX 10 alt4.aspmx.l.google.com 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
MX 1 aspmx.l.google.com 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT google-site-verification=HHC0j5mcC05kfiQfxmiYUfsicdbGYAJyh0gKySbCcDM 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT reachdesk-verification=gzGzYoV4RdcIj5gGsLsXBmdtmVBeVfDfro9HrQ2Q6TCsKUF5xQW6PGnmTOsip3bR 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
NS ns-1359.awsdns-41.org 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT v=spf1 include:_spf.google.com include:_spf.salesforce.com include:40004831.spf02.hubspotemail.net ~all 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
MX 5 alt1.aspmx.l.google.com 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
TXT google-site-verification=4uv57KflyDjYKic07oPiF5ypArLxQQYp_e-u2RCQ2rE 2026-05-25 22:05:29.416 2026-07-28 19:02:52.609
CAA 0 issue "awstrust.com" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609
CAA 0 issue "comodoca.com" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609
CAA 0 issue "amazontrust.com" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609
CAA 0 issue "amazonaws.com" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609
CAA 0 issue "letsencrypt.org" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609
CAA 0 issue "amazon.com" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609
CAA 0 issuewild ";" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609
CAA 0 issue "digicert.com" 2026-05-26 00:17:38.499 2026-07-28 19:02:52.609