CONTINUOUS INTERNET TELEMETRY24H DRIFT53,215 material changesacross 49,422 domains · 24h to ~80m ago · -8,861 vs yesterdayROTATION49 domains moved DNS from magpiedns.com to koaladns.com, 49 moved backa rotation loop, not a migration · 24hNOW534 curated domains not reachablelast probe, steadySITE ERRORS33,892 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 120,233 sites429 rate-limit / 403 bot-block, a posture signal

o2.cz

Observed Aug 3, 2026, 00:51 UTC (4d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of o2.cz was taken 4d ago

o2.cz is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting o2.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 o2.cz Watching a domain needs a DRM3 account. The reading above stays free and public either way.
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Up right now
Runs onO2 Czech Republic
Secured byDigiCert
Also usesMiroGoogle Search Console
IPv6 · tranco_40k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat o2.cz actually stands on - every host below is a signed observation
o2.cz
A / AAAA
160.218.161.1622001:41d8:1:742:2::2
O2 Czech Republicserves the site
NS
dns.iol.czns2.tel.cz
iol.cz + tel.czanswers its DNS
MX
smtp-in.o2.cz
o2.czreceives its email
TLS
*.o2.cz
DigiCert Incissued its certificate

DNS Records

A 1

  • 160.218.161.162

AAAA 1

  • 2001:41d8:1:742:2::2

MX 1

  • 10smtp-in.o2.cz

TXT 14

  • MS=ms52641182
  • 7m05t8bvlcch53s7ys5nrxwxsnrgmphd
  • _9frav04xdjt7z530iuh0x10dk8qxx7o
  • apple-domain-verification=VZSWFvHLE8imRQhe
  • MS=7B9F81FDD83DA2FFCACC2C8F3F61B941A25EDBB4
  • ppe-87ef0e4514ad3c042110125606a3c6311b5dc64b
  • miro-verification=814cf298c288c6fcf51f6243354f4ff27b13a3d0
  • google-site-verification=0TIBeL91z3rZRIMY0CZSLblUAbTxh0Kr8BPG3LFtA_8
  • google-site-verification=dmXvwWWa1j3drUuBbW7E0YVtqVGwtB1HY4tN6B9sFSw
  • browserstack-domain-verification=959efc5e-d239-4b29-972b-846a3587e939

NS 2

  • dns.iol.cz
  • ns2.tel.cz

SOA 1

  • dns.iol.cz hostmaster.iol.cz

SRV 4

  • expeprahol1.o2.cz:5060 p10
  • expeprahol1.o2.cz:5061 p10
  • expeprahol1.o2.cz:5222 p10
  • expeprahol1.o2.cz:5269 p10

DMARC_RECORDS 1

  • v=DMARC1; p=quarantine; rua=mailto:dmarc_rua@o2.cz,mailto:dmarc+187001@smartemailing.cz; fo=1

BIMI_RECORDS 1

  • v=BIMI1; l=https://vmc.digicert.com/bdcf68dc-6bf2-425d-a6df-bf4321caa4d2.svg; a=https://vmc.digicert.com/bdcf68dc-6bf2-425d-a6df-bf4321caa4d2.pem

TLS Certificates (2)

Common NameIssuerExpires
*.o2.cz C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=Thawte TLS RSA CA G1 Thu, 29 Oct 2026 23:59:59 +0000
Thawte TLS RSA CA G1 C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2 Tue, 02 Nov 2027 12:24:25 +0000

Subdomains (0)

None observed.

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_141ac2e4c86167d2
Output Hash
ab8264a018351146c93302b46100e53ce60177b8c0dd60d291580844b3b10538
Signature
ed25519:8569a338b45b0c8421920ba695442947c57ce1542babb3acc2f5d838cb94ee2a04d3ce43afcf7c62600c760853d4dae40a316e320faf1701015c2cfb60984209
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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