CONTINUOUS INTERNET TELEMETRY24H DRIFT37,653 material changesacross 34,127 domains · 24h to ~25m agoDNS DRIFT55 domains changed DNS providertop destination koaladns.com · +33 vs yesterdayNOW556 curated domains not reachablelast probe, steadySITE ERRORS33,351 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 156,386 sites429 rate-limit / 403 bot-block, a posture signal

upcr.cz

Observed Aug 2, 2026, 09:29 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of upcr.cz was taken 2d ago

upcr.cz is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting upcr.cz 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 upcr.cz 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 usesGoogle Search Console
IPv6 · 1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat upcr.cz actually stands on - every host below is a signed observation
upcr.cz
A / AAAA
77.93.207.132a01:430:100:38::2
2a01serves the site
NS
dns2.master.czd1264.master.cz
master.czanswers its DNS
MX
mail.upcr.czns3.master.cz
upcr.cz + master.czreceives its email
TLS
upcr.cz
Let's Encryptissued its certificate

DNS Records

A 1

  • 77.93.207.13

AAAA 1

  • 2a01:430:100:38::2

MX 2

  • 10mail.upcr.cz
  • 20ns3.master.cz

TXT 2

  • v=spf1 ip4:77.93.207.13 ip4:77.93.207.12 ip6:2a01:430:100:38::2 a mx ~all
  • google-site-verification=9u5upcCCfOeHDsOrptVsKmUqitnmLPmJ77XahWjHnUs

NS 2

  • dns2.master.cz
  • d1264.master.cz

SOA 1

  • d1264.masterinter.net root.d1264.master.cz

DMARC_RECORDS 1

  • v=DMARC1; p=none; aspf=r; sp=none

TLS Certificates (3)

Common NameIssuerExpires
upcr.cz C=US, O=Let's Encrypt, CN=YR2 Sun, 04 Oct 2026 00:43:18 +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_78901e8327e14249
Output Hash
12cc12e4b38679e4d1a0a4fb36ecf18db5d33a533b9b62299fab8cb1a63c9576
Signature
ed25519:cb95e97bb7654d191d5bef052a2414004a4b7ca3971253ae5ca417dac76fbaeff030f13640a481ed9ed32baa9217f68a421c45a021b9bd0c1a64557378237d0a
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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