hathitrust.org

Observed Jul 18, 2026, 13:02 UTC (8h ago). Every field below was attested with an Ed25519 signature at scan time.

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

172.66.0.37162.159.140.372a06:98c1:58::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

172.66.0.37
162.159.140.37

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: 9004428f-c582-4748-8897-4d6ac5237f35
Output Hash: 77582b748d8f4ec1995dcea09fee38be864e44158f50d1fde8488b21ce5f5487
Signature: ed25519:f62530f6627fbdd11869fd994281321b99ff13283bfc671c1c889197c0180e8ac233163e37c6925e8f90906643bdef4da8f39c4c915b76603a2a71e1629f2401
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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