cert.org

Observed Jul 24, 2026, 18:25 UTC (8d 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 onCarnegie Mellon University

Secured byInCommon

Also usesGoogle Search Console

1 subdomain · tranco_20k

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

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

cert.org

A / AAAA

147.72.252.242

Carnegie Mellon Universityserves the site

ns-1403.awsdns-47.orgns-1794.awsdns-32.co.ukns-28.awsdns-03.comns-916.awsdns-50.net

awsdns-47.org + awsdns-32.co.uk + moreanswers its DNS

tilton.sei.cmu.edutingley.sei.cmu.edu

cmu.edureceives its email

TLS

www.cert.org

InCommonissued its certificate

DNS Records

A 1

147.72.252.242

MX 2

10tilton.sei.cmu.edu
10tingley.sei.cmu.edu

TXT 6

DBCAA5143AC8DA050F83A2DCA34D2135
GjlKiHz4O+yqufLrRIiCkmyaNeKDsFtlP0EdfJ5Hd0ERRCB3rBFfT0hjRz5KpuVbK7z1iW6Vh6MtnSK/dHi1Lg==
MS=ms99326395
google-site-verification=XOhFzgbzrxnwXF_zY4WWTJSkIyRfIjEI8eaOJCx4WiI
v=spf1 ip4:147.72.252.0/27 include:spf.protection.office365.us ?all
v=DMARC1; p=none; adkim=r; aspf=r; fo=0; rf=afrf; rua=mailto:brndm82m-aen4zffh@sei.cmu.edu; ruf=mailto:zahuj14e-0jwboxgg@sei.cmu.edu

NS 4

ns-1403.awsdns-47.org
ns-1794.awsdns-32.co.uk
ns-28.awsdns-03.com
ns-916.awsdns-50.net

SOA 1

ns-1403.awsdns-47.org awsdns-hostmaster.amazon.com

CAA 3

iodef "mailto:caa-reports@sei.cmu.edu"
issue "emsign.com"
issuewild "emsign.com"

TLS Certificates (4)

Common Name	Issuer	Expires
`www.cert.org`	C=US, O=InCommon, LLC, CN=InCommon ECC OV SSL CA 3	Wed, 27 Jan 2027 23:59:59 +0000
`InCommon ECC OV SSL CA 3`	C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication Root E46	Mon, 05 Nov 2035 23:59:59 +0000
`Sectigo Public Server Authentication Root E46`	C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust ECC Certification Authority	Mon, 18 Jan 2038 23:59:59 +0000
`USERTrust ECC Certification Authority`	C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust ECC Certification Authority	Mon, 18 Jan 2038 23:59:59 +0000

Subdomains (1)

www.cert.org

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

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

Ed25519 Receipt

Receipt ID: rcpt_0d635fc9e5001c05
Output Hash: d375635f33e97c1230d4649f69aca11e5d79519c65615084739611cdf7249621
Signature: ed25519:35ef2f49012dda87ee44618dbcd6b7641bebcdd76199610da54fddf85ab71dc7a2eaef6725b109071271d9fbc5945b909c3b4e01e9a616df3eb96ac2cbcc4001
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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