harpercollins.com

Observed Jul 18, 2026, 12:09 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Guarded by a firewall

Runs onCloudflare

Email byProofpoint

Secured byDigiCert

Registered withMarkMonitor Inc.

Also usesFigmaGoogle Search ConsoleAtlassianZoomDockerDocuSign

1 subdomain · media_entertainment

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat harpercollins.com actually stands on - every host below is a signed observation

harpercollins.com

A / AAAA

23.227.38.65

Cloudflareserves the site

dbru.br.ns.els-gms.att.netdmtu.mt.ns.els-gms.att.net

att.netanswers its DNS

mxa-00596a01.gslb.pphosted.commxb-00596a01.gslb.pphosted.com

Proofpointreceives its email

TLS

harpercollins.com

DigiCert Incissued its certificate

DNS Records

A 1

23.227.38.65

MX 2

5mxa-00596a01.gslb.pphosted.com
5mxb-00596a01.gslb.pphosted.com

TXT 33

figma-domain-verification=2f62cdb936c6fe21e979b91c99c54d82fb999e849a36aa4b2c5d05e3f7ffad82-1771355140
google-site-verification=jBGiywYAcKUeCPqNZsGSvr_C6RMCPh0Z9g73o-1sBVI
nmmBU9m0JKlQMzYMFSA/7LacnfwY0LsGTpiMcOsFM0jILtamuI3jvV2g3+O7KKOWO4rFfGHDmZWIO4IRD+zdlg==
dropbox-domain-verification=ucbh5javnke3
google-site-verification=tyaXIKYYcxrtquGnQyTPzzqgJzO-f3JTYTofj1Pzg8c
adobe-idp-site-verification=42f51b67c9248bf4af00579848be3b6b4165111f7e95fa138083c369ab1e127f
/eU+eq5f7XbZNa8X8rWAWZCAxYOy7z4IYhIT2Hp05EahhGMbex3/zdcOQDwWN6QGJr6ECqI6hdg1TqprNfJiYg==
webexdomainverification.4C675B8AE253B136E053AB06FC0A3F65=af0d073d-91d2-47fb-afa5-c35672c317c2
dbc36a8f57004cec8e50382190a4c767
adobe-sign-verification=f95381908feb7fd54d511615905bee51

NS 2

dbru.br.ns.els-gms.att.net
dmtu.mt.ns.els-gms.att.net

SOA 1

dbru.br.ns.els-gms.att.net rm-hostmaster.ems.att.com

SRV 3

expedge02.harpercollins.com:5060 p10
expedge02.harpercollins.com:5061 p10
mailservices.harpercollins.com:443 p0

TLS Certificates (3)

Common Name	Issuer	Expires
`harpercollins.com`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=GeoTrust TLS RSA CA G1	Sun, 06 Dec 2026 23:59:59 +0000
`GeoTrust 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 12:23:37 +0000
`DigiCert Global Root G2`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root CA	Sun, 09 Nov 2031 23:59:59 +0000

Subdomains (1)

www.harpercollins.com

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 harpercollins.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: e8fc86fe-05e8-4435-b252-88108533c584
Output Hash: bbace0835a9e3cf427d3b0d31b0f637698946afd9b51739e7e3c6f7c5315add9
Signature: ed25519:d409fe9fdfa0afd06a9dd5294eb4d899270ded49aac62ff65a1e882cb69d618014e8033aeb2f4cc8ad818eefbc8f3676f4d0475fb3eb35327f00dfea6f638c01
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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