CONTINUOUS INTERNET TELEMETRY24H DRIFT9,850 material changesacross 9,431 domains · 24h to ~85m ago · -31,010 vs yesterdayNOW564 curated domains not reachablelast probe, steadySITE ERRORS34,226 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 156,310 sites429 rate-limit / 403 bot-block, a posture signalMOVERokta.comNo mail routes in the latest observation

ursi.org

Observed Aug 2, 2026, 08:38 UTC (14h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

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Up right now
Secured byLet's Encrypt
1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat ursi.org actually stands on - every host below is a signed observation
ursi.org
A / AAAA
5.134.4.197
unattributedserves the site
NS
ns1.combell.euns3.combell.netns4.combell.net
combell.eu + combell.netanswers its DNS
MX
mx.backup.mailprotect.bemx.mailprotect.be
mailprotect.bereceives its email
TLS
ursi.org
Let's Encryptissued its certificate

DNS Records

A 1

  • 5.134.4.197

MX 2

  • 50mx.backup.mailprotect.be
  • 10mx.mailprotect.be

TXT 1

  • v=spf1 include:_spf.relay.mailprotect.be ip4:37.46.141.132 -all

NS 3

  • ns1.combell.eu
  • ns3.combell.net
  • ns4.combell.net

SOA 1

  • ns3.combell.net hostmaster.ursi.org

SRV 3

  • autodiscover-s.mailprotect.be:443 p1
  • imap.mailprotect.be:993 p1
  • smtp-auth.mailprotect.be:587 p1

DMARC_RECORDS 1

  • v=DMARC1; p=none; rua=mailto:inge.lievens@ugent.be,mailto:kristien.demeulder@ugent.be; ruf=mailto:inge.lievens@ugent.be,mailto:kristien.demeulder@ugent.be; fo=1;

TLS Certificates (3)

Common NameIssuerExpires
ursi.org C=US, O=Let's Encrypt, CN=YR2 Mon, 21 Sep 2026 17:42:40 +0000
YR2 C=US, O=ISRG, CN=Root YR Sat, 02 Sep 2028 23:59:59 +0000
Root YR C=US, O=Internet Security Research Group, CN=ISRG Root X1 Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

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; nothing leaves your machine.

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Ed25519 Receipt

Receipt ID
rcpt_b82b93c4c60f2ee8
Output Hash
c239bc1c9be2dff9837fd1c472675eb70a56f6ffce2193c45d847407dfdbf290
Signature
ed25519:2402fde905411b9c02bf2bc57822d907070243c7068045d1dce88d4e2e4f481e8132834a9887695fe0d0eb1e9c8cc7844abda94f8c2be63081e81e585428ab0d
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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