marum.de

Observed Aug 11, 2026, 05:41 UTC (4d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of marum.de was taken 4d ago

marum.de is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting marum.de under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.

Watch marum.de Watching a domain needs a DRM3 account. The reading above stays free and public either way.
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Up right now
Secured byLet's Encrypt
Also usesMicrosoft 365AppleGoogle Search Console
3 subdomains · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat marum.de actually stands on - every host below is a signed observation
marum.de
A / AAAA
134.102.234.63
unattributedserves the site
NS
ns.informatik.uni-bremen.deines.zfn.uni-bremen.dedeneb.dfn.de
uni-bremen.de + dfn.deanswers its DNS
MX
mail1.marum.demail2.marum.de
marum.dereceives its email
TLS
marum.de
Let's Encryptissued its certificate

DNS Records

A 1

  • 134.102.234.63

MX 2

  • 10mail1.marum.de
  • 20mail2.marum.de

TXT 4

  • MS=ms37500307
  • apple-domain-verification=0IWMyzgkEH2sILix
  • google-site-verification=tLzQWruBqInkZ0FPO8Lve0Nl0dTok0IBNbzYLBVwhz0
  • v=spf1 mx ip4:134.102.234.15 ip4:134.102.234.17 ip4:134.102.234.18 ip4:134.102.234.19 ip4:134.102.234.37 ip4:134.102.234.126 ip4:134.102.234.56 include:spf.eprov.eu a:marumfreunde.de -all

NS 3

  • ns.informatik.uni-bremen.de
  • ines.zfn.uni-bremen.de
  • deneb.dfn.de

SOA 1

  • ines.zfn.uni-bremen.de helms.zfn.uni-bremen.de

SRV 3

  • autodiscover.marum.de:443 p0
  • imap.marum.de:993 p0
  • smtp.marum.de:587 p0

CAA 4

  • issue "harica.gr"
  • issue "letsencrypt.org"
  • issue "pki.dfn.de"
  • issuewild "harica.gr"

DMARC_RECORDS 1

  • v=DMARC1; p=reject; rua=mailto:dmarc-reports@marum.de; ruf=mailto:dmarc-reports@marum.de; sp=none; fo=0:s; adkim=r; aspf=r

TLS Certificates (4)

Common NameIssuerExpires
marum.de C=US, O=Let's Encrypt, CN=YE1 Thu, 15 Oct 2026 08:03:27 +0000
YE1 C=US, O=ISRG, CN=Root YE Sat, 02 Sep 2028 23:59:59 +0000
Root YE C=US, O=Internet Security Research Group, CN=ISRG Root X2 Thu, 02 Sep 2032 23:59:59 +0000
ISRG Root X2 C=US, O=Internet Security Research Group, CN=ISRG Root X1 Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (3)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; the only network request the check makes is for the published public keys.

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Ed25519 Receipt

Receipt ID
rcpt_a8536b5443c82f3a
Output Hash
52f9002d1db86b35e6ef8452fa585d0b631479d4414dc2d739353ac825e57aef
Signature
ed25519:11681efac3847c307f9227c51c656ffc90432ce350ad2210442e649ecacea23ebcb09e7e9713772cf772d2a3c7c3fad7d031512b818fcb1d18a15327b481e509
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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CONTINUOUS INTERNET TELEMETRY24H DRIFT43,921 material changesacross 42,264 domains · 24h to ~3h ago · +414 vs yesterdayROTATION61 domains moved DNS from magpiedns.com to koaladns.com, 58 moved backa rotation loop, not a migration · 24hNOW496 curated domains not reachablelast probe, steadySITE ERRORS36,299 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 117,252 sites429 rate-limit / 403 bot-block, a posture signal