4dox.cz

Last scanned 2h ago; the signed record is unchanged since 15d ago. Every field below carries an Ed25519 signature from that last reading. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Up right now
Runs onSATT a.s
Email byGoogle Workspace
Secured byLet's Encrypt
Registered withREG-INTERNET-CZ
Also usesFacebook/MetaGoogle Search Console
1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
DRIFT

Steady. No change on record for 4dox.cz in the last day; this reading matches the one before it. The steady record is signed like every other reading. Watch it to catch the next move the moment it lands.

SIGNED-OUT VIEW Provider names, posture and counts are shown. The record values - every DNS answer, each subdomain hostname, raw TXT, IPs, cert names and WHOIS - are the product. Sign in for the full signed record, or use the API with a key.

DNS records 13

A1NS3MX1TXT7SOA1

TLS certificates 3

Issued byLet's Encrypt
ExpiresSat, 07 No (73d)
Certificate nameswithheld

Subdomains 1

1 subdomain hostname observed and signed - the list itself is part of the paid record.

WILDCARD DNSobserved 2026-08-26 00:42 UTC

DomainDrift asked this domain for one hostname that nobody ever registered, and it answered. A domain that answers invented hostnames is running wildcard DNS. It is common and usually deliberate. A SaaS platform gives every customer a subdomain this way. How the check works

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 receiptthe raw cryptographic proof
Receipt ID
rcpt_dbe92bb428a9fa79
Output Hash
f89c9207e93474f165bb04b2a02c6dc735b9f0813e026dd40c56b3d3224ffdd9
Signature
ed25519:6d428b55162c874b9fa7215f76f41e15dd923db2ed2bcae71da45ab5a129c15005af9a37112ff31bcd42b28edeb2750031a3c6b58c759ee52db6213c13126d09
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
CONTINUOUS INTERNET TELEMETRY24H DRIFT4,916 material changesacross 3,387 domains · 24h to ~3h ago · +517 vs yesterdayDNS DRIFT95 domains changed DNS providertop destination koaladns.com · -1 vs yesterdayEMAIL DRIFT1 domain switched email provider24hREGISTRAR DRIFT1 changed registrar24hNOW536 curated domains not reachablelast probe, steadySITE ERRORS17,746 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 78,702 sites429 rate-limit / 403 bot-block, a posture signal