hathitrust.org

Observed Jul 22, 2026, 00:13 UTC (2d 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

Guarded by a firewall

Runs onCloudflare

Secured byLet's Encrypt

Also usesAtlassianGoogle Search Console

IPv6 · 7 subdomains · tranco_20k

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

INFRASTRUCTURE MAPwhat hathitrust.org actually stands on - every host below is a signed observation

hathitrust.org

A / AAAA

162.159.140.37172.66.0.372a06:98c1:58::252606:4700:7::25

Cloudflareserves the site

blue.foundationdns.comblue.foundationdns.netblue.foundationdns.org

foundationdns.com + foundationdns.net + moreanswers its DNS

route3.mx.cloudflare.netroute1.mx.cloudflare.netroute2.mx.cloudflare.net

cloudflare.netreceives its email

TLS

hathitrust.org

Let's Encryptissued its certificate

DNS Records

A 2

162.159.140.37
172.66.0.37

AAAA 2

2a06:98c1:58::25
2606:4700:7::25

MX 3

2route3.mx.cloudflare.net
58route1.mx.cloudflare.net
69route2.mx.cloudflare.net

TXT 6

atlassian-domain-verification=r7crdNkrd4xTyO6L9dtFNrg/LsI6IzidDwUjz1XjDJpKagBWiuxz5D81MsyVBk6H
atlassian-sending-domain-verification=e7667d98-58b2-4fb1-bfaf-ef40bd5aec2a
google-site-verification=7jvEHGt2yEogk4ZayHn1YrkTObNMQRqFLK43TkBETzw
google-site-verification=WtHDwMoCLEMmsRU23UKev1gAKJv6KCFhC_b7cVuGNls
v=spf1 include:_spf.atlassian.net include:_spf.mail.umich.edu include:_spf.mx.cloudflare.net ~all
v=DMARC1;p=none;pct=100;rua=mailto:lit.dmarc.reports@umich.edu

NS 3

blue.foundationdns.com
blue.foundationdns.net
blue.foundationdns.org

SOA 1

blue.foundationdns.com dns.cloudflare.com

TLS Certificates (4)

Common Name	Issuer	Expires
`hathitrust.org`	C=US, O=Let's Encrypt, CN=YE2	Tue, 13 Oct 2026 14:38:34 +0000
`YE2`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (7)

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 hathitrust.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_9cb87aed6140b190
Output Hash: 5044a3317a941d6a4c6e31fa03f344ea59f72eafbfc8c683ddcfc096b83d2b60
Signature: ed25519:5af43fb64a71149b4d4758c049732e08a4ab16419db4945b2574f3e76d08aee0fb54b9fbe5ed1cd41c6b3fd46dc5045f38de6430c889baa6a59cf37c9851af02
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/hathitrust.org