zybooks.com

Observed Jul 24, 2026, 19:43 UTC (9d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

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

dan.ns.cloudflare.comdestiny.ns.cloudflare.com

cloudflare.comanswers its DNS

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 Name	Issuer	Expires
`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; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for zybooks.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/zybooks.com">
  <img src="https://domaindrift.io/badge/zybooks.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for zybooks.com">
</a>

Ed25519 Receipt

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

Verify this in your browser

Permalink: https://domaindrift.io/t/zybooks.com