CONTINUOUS INTERNET TELEMETRY24H DRIFT48,392 material changesacross 43,424 domains · 24h to ~60m ago · +13,986 vs yesterdayROTATION55 domains moved DNS from koaladns.com to magpiedns.com, 54 moved backa rotation loop, not a migration · 24hNOW611 curated domains not reachablelast probe, steadySITE ERRORS34,178 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 116,838 sites429 rate-limit / 403 bot-block, a posture signal

zybooks.com

Observed Jul 24, 2026, 19:43 UTC (16d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of zybooks.com was taken 16d ago

zybooks.com is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting zybooks.com 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 zybooks.com Watching a domain needs a DRM3 account. The reading above stays free and public either way.
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Up right now
Runs onCloudflare
Email byProofpoint
Secured byLet's Encrypt
Also usesGoogle Search ConsoleSlack
tranco_100k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat zybooks.com actually stands on - every host below is a signed observation
zybooks.com
A / AAAA
104.199.123.136
Cloudflareserves the site
NS
dan.ns.cloudflare.comdestiny.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
mxa-0053b401.gslb.pphosted.commxb-0053b401.gslb.pphosted.com
Proofpointreceives its email
TLS
zybooks.com
Let's Encryptissued its certificate

DNS Records

A 1

  • 104.199.123.136

MX 2

  • 10mxa-0053b401.gslb.pphosted.com
  • 10mxb-0053b401.gslb.pphosted.com

TXT 7

  • MS=ms65066727
  • anthropic-domain-verification-4wzmc8=bjnU9LOSt3ytqLyLBmQ0ZYBk2
  • google-site-verification=TezSwO5Ql-ozjHjMix9mS3HQhVTVg3niVeD760qM-Ok
  • slack-domain-verification=wArzneco6YoAdgt54kibCDGPgHVXUK38fRmaGOhV
  • status-page-domain-verification=l837dwqw4jlv
  • v=spf1 include:mail.zendesk.com include:spf-0053b401.pphosted.com include:mailgun.org include:mktomail.com include:servers.mcsv.net include:stspg-customer.com ~all
  • v=DMARC1; p=quarantine; pct=1; rua=mailto:bd9b807369974ab18f0060bb4d6e5749@dmarc-reports.cloudflare.net,mailto:dmarc_agg@vali.email; ruf=mailto:ruf@wiley.com; fo=1

NS 2

  • dan.ns.cloudflare.com
  • destiny.ns.cloudflare.com

SOA 1

  • dan.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (3)

Common NameIssuerExpires
zybooks.com C=US, O=Let's Encrypt, CN=YR1 Thu, 15 Oct 2026 01:33:19 +0000
YR1 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 (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.

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Ed25519 Receipt

Receipt ID
rcpt_f9f2d68aa9ccb1c8
Output Hash
48f7d55a8ba141bf313525b36f63da2733cc11ee42b81f10fdf8ed916b9a3e24
Signature
ed25519:a00ccd7a2a08a1379ff8b40db2a9da3f483c3aa2a198bc211559a7386339846c7452c13b2bd2723f4126df8eedeb9f7329d275f1f46221b705dc9113b90c8303
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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