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
185.67.36.168 2a05:bc0:1000::168:1 185.67.36.169 2a05:bc0:1000::169:1
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::168:1 185.67.36.168 2a05:bc0:1000::169:1
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

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
CAA 0 iodef "mailto:hostmaster@posteo.de" 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
AAAA 2a05:bc0:1000::169:1 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
MX 10 mx04.posteo.de 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS global.excedodns.com 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS ns02.posteo-dns.de 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS ns21.posteo-dns.ch 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
CAA 0 issue "d-trust.net" 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
CAA 0 issuewild "geotrust.com" 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
CAA 0 issue "geotrust.com" 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
CAA 0 issue "certum.pl" 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS ns31.posteo-dns.eu 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
TXT e09403217652a8ddff5c9587701e02f9d12b226b6523bcf247aee481d00b4b1 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS world.excedodns.org 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS ns01.posteo-dns.de 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS emea.excedodns.eu 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
TXT v=spf1 ip4:185.67.36.0/23 ip6:2a05:bc0:1000::/47 ~all 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
A 185.67.36.168 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
AAAA 2a05:bc0:1000::168:1 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS sto.excedodns.se 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
NS nordic.excedodns.net 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
TXT 84944eaf2fa3496cc8b73383c39b0046330432b19e3400ce8c21052b09194db 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
CAA 0 issuewild "d-trust.net" 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
MX 10 mx02.posteo.de 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
MX 10 mx03.posteo.de 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
MX 10 mx01.posteo.de 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
A 185.67.36.169 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603
SRV _autodiscover._tcp 0 0 443 posteo.de 2026-05-26 03:41:45.201 2026-07-23 07:18:54.603