Check-Host.cc

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

posteo.de

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

DNS Check HTTP Check Run Full Scan .de TLD

Run a live full scan of posteo.de

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
21
A/AAAA targets
Subdomains
34
CT + scan + body
Record Types
7
seen in DNS
Observed Certs
2
in our scans

DNS Records

A
—
AAAA
—
MX
—
NS
—
TXT
—
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

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
api.posteo.de
185.67.36.168 2a05:bc0:1000::168:1 185.67.36.169 2a05:bc0:1000::169:1
2026-07-22 15:34:16.810
autoconfig.posteo.de
185.67.36.169 2a05:bc0:1000::169:1 185.67.36.168 2a05:bc0:1000::168:1
2026-07-22 15:34:16.810
cdn.posteo.de
185.67.36.168 2a05:bc0:1000::168:1 185.67.36.169 2a05:bc0:1000::169:1
2026-07-22 15:34:16.810
code.posteo.de
185.67.36.164 185.67.36.163 2a05:bc0:1000::164:1 2a05:bc0:1000::163:1
2026-06-16 21:27:43.355
lists.posteo.de
185.67.36.169 2a05:bc0:1000::168:1 2a05:bc0:1000::169:1 185.67.36.168
2026-07-22 15:34:16.810
mta-sts.posteo.de
185.67.36.168 2a05:bc0:1000::169:1 185.67.36.169 2a05:bc0:1000::168:1
2026-07-22 15:34:16.810
pad.posteo.de
185.67.36.165 185.67.36.166 2a05:bc0:1000::165:1 2a05:bc0:1000::166:1
2026-06-16 21:27:43.355
payment.posteo.de
185.67.36.161 185.67.36.162 2a05:bc0:1000::161:1 2a05:bc0:1000::162:1
2026-05-26 12:01:30.636
posteo.de
185.67.36.169 2a05:bc0:1000::169:1 2a05:bc0:1000::168:1 185.67.36.168
2026-07-23 07:18:54.603
www.posteo.de
185.67.36.169 2a05:bc0:1000::168:1 185.67.36.168 2a05:bc0:1000::169:1
2026-07-22 15:34:16.810
mon02.posteo.de
185.67.36.52 2a05:bc0:1000::52:1
2026-06-16 21:27:43.355
mon03.posteo.de
185.67.36.53 2a05:bc0:1000::53:1
2026-06-16 21:27:43.355
staging.posteo.de
89.146.220.132
2026-07-18 09:23:37.419

Tech Stack

Tech detection pending

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

TLS Certificates

185.67.36.119:443 676fc453cb39…
Subject: posteo.de
Issuer: GeoTrust EV RSA CA G2
SANs: api.posteo.de, autoconfig.posteo.de, cdn.posteo.de, lists.posteo.de, mta-sts.posteo.de, posteo.de, www.posteo.de
185.67.36.118:8443 676fc453cb39…
Subject: posteo.de
Issuer: GeoTrust EV RSA CA G2
SANs: api.posteo.de, autoconfig.posteo.de, cdn.posteo.de, lists.posteo.de, mta-sts.posteo.de, posteo.de, www.posteo.de
185.67.36.119:443 676fc453cb39…
Subject: posteo.de
Issuer: GeoTrust EV RSA CA G2
SANs: api.posteo.de, autoconfig.posteo.de, cdn.posteo.de, lists.posteo.de, mta-sts.posteo.de, posteo.de, www.posteo.de
185.67.36.161:443 5947c0c4b89b…
Subject: payment.posteo.de
Issuer: GeoTrust EV RSA CA G2
SANs: payment.posteo.de

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

Domain timeline pending

Passive-DNS history accumulates as our forward-DNS crawler observes A/AAAA/MX/NS/TXT records over time.