openstax.org

Observed Jul 18, 2026, 12:24 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onAmazon

Email byGoogle Workspace

Secured byAmazon

Registered withGoDaddy.com, LLC

Also uses1PasswordFacebook/MetaGoogle Search Console

push_legacy

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

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

openstax.org

A / AAAA

3.167.56.1103.167.56.403.167.56.1133.167.56.14

Amazonserves the site

ns-1195.awsdns-21.orgns-2027.awsdns-61.co.ukns-358.awsdns-44.comns-602.awsdns-11.net

awsdns-21.org + awsdns-61.co.uk + moreanswers its DNS

aspmx.l.google.comalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx2.googlemail.com+3 more

Google Workspacereceives its email

TLS

openstax.org

Amazonissued its certificate

DNS Records

A 4

3.167.56.110
3.167.56.40
3.167.56.113
3.167.56.14

MX 7

10aspmx.l.google.com
20alt1.aspmx.l.google.com
20alt2.aspmx.l.google.com
30aspmx2.googlemail.com
30aspmx3.googlemail.com
30aspmx4.googlemail.com
30aspmx5.googlemail.com

TXT 12

1password-site-verification=USDQ5N76BVCB5CXXBSZ34POROQ
MS=ms58383868
anthropic-domain-verification-ewhe7h=S2BgAeCil3ayY972YJsaqRznM
facebook-domain-verification=qehn0rayh30a1mrjbmt6ncx7lf6evi
google-site-verification=5P1KHg2sIon0NiYhjrIxuLk_EZtd2bdHOJwMh9DcyFc
google-site-verification=h-yRpYjInlbkB3Sngplfqbq70q0CYVvoJ-w1070hHOM
google-site-verification=kU898HQbWPBk88hCzxxput41Du008GyrmHuZ_0tu-XU
ij7237pjdbunduigm3aog31coa
pardot218812=cad18a59f84a76dac099a1090cfe14fb86bfda2f2f3b1049d3ca49550886ddb7
v=spf1 include:_spf.google.com include:amazonses.com include:spf1.formassembly.com include:_spf.salesforce.com include:aspmx.pardot.com ~all

NS 4

ns-1195.awsdns-21.org
ns-2027.awsdns-61.co.uk
ns-358.awsdns-44.com
ns-602.awsdns-11.net

SOA 1

ns-2027.awsdns-61.co.uk awsdns-hostmaster.amazon.com

TLS Certificates (3)

Common Name	Issuer	Expires
`openstax.org`	C=US, O=Amazon, CN=Amazon RSA 2048 M04	Tue, 10 Nov 2026 23:59:59 +0000
`Amazon RSA 2048 M04`	C=US, O=Amazon, CN=Amazon Root CA 1	Fri, 23 Aug 2030 22:26:35 +0000
`Amazon Root CA 1`	C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Services Root Certificate Authority - G2	Thu, 31 Dec 2037 01:00:00 +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 openstax.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 07fa40c7-d51b-46a1-aa07-8d9c87d0ccb2
Output Hash: 9ad22fe65fd97b49ebf88c3bea0e3d46f6bcbe8aa380e44302c61ac505b3a02c
Signature: ed25519:0e3c799bf90588be2587f3300d95e26828b59b806736a492cc21255c9f91b52a18828d0760a6e5c9955e6b0b16d1ebf4b83cf9947d9312cc6163acaf3422d405
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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