CONTINUOUS INTERNET TELEMETRY24H DRIFT50,775 material changesacross 47,754 domains · 24h to ~2h ago · -11,301 vs yesterdayROTATION50 domains moved DNS from kirklanddc.com to koaladns.com, 49 moved backa rotation loop, not a migration · 24hNOW532 curated domains not reachablelast probe, steadySITE ERRORS33,880 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 120,115 sites429 rate-limit / 403 bot-block, a posture signal

ursi.org

Observed Aug 2, 2026, 08:38 UTC (4d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of ursi.org was taken 4d ago

ursi.org is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting ursi.org 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 ursi.org Watching a domain needs a DRM3 account. The reading above stays free and public either way.
Verify this receipt yourself + Watch this domain
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; the only network request the check makes is for the published public keys.

Verify this receipt

Ed25519 Receipt

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