columbia.edu

Observed Jul 27, 2026, 20:29 UTC (4d 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

Email byProofpoint

Secured byGoogle Trust Services

Also usesGoogle Search ConsoleDocuSignZoomAtlassian

institutions

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

INFRASTRUCTURE MAPwhat columbia.edu actually stands on - every host below is a signed observation

columbia.edu

A / AAAA

162.159.138.64162.159.128.65

Cloudflareserves the site

ext-ns1.columbia.eduauth2.dns.cogentco.comauth1.dns.cogentco.comns1.lse.ac.uk

columbia.edu + cogentco.com + moreanswers its DNS

mxb-00364e01.gslb.pphosted.commxa-00364e01.gslb.pphosted.com

Proofpointreceives its email

TLS

columbia.edu

Google Trust Servicesissued its certificate

DNS Records

A 2

162.159.138.64
162.159.128.65

MX 2

10mxb-00364e01.gslb.pphosted.com
10mxa-00364e01.gslb.pphosted.com

TXT 36

google-site-verification=6m_FjnmBT3E6N2cHMf6NxPjSVoWbq4IcRYNlAKT1Dzw
wpe-verification=ncdpcolumbia
atlassian-domain-verification=3a/aVmiVzaMOzlhAodx3n7lmq1cDotGOHNI3ehzFLzgN7YLZEBEjnxaaqyMmLY9s
v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all
anthropic-domain-verification-01mqc0=QYIx6Pw50pyhbeOfqjhRRNpve
asv=c2f28d3e6fab94ed285140f6a7a2f595
00D36000000XoHU=1TBUw00000001fF
00DVG000008EUsr=1TBVG0000000K0L
autodesk-domain-verification=P6lfZ9W5VspsY7qG7oL0
FD558E9C831CB5AFEEF2C5334AEC4B3F

NS 4

ext-ns1.columbia.edu
auth2.dns.cogentco.com
auth1.dns.cogentco.com
ns1.lse.ac.uk

SOA 1

ext-ns1.columbia.edu hostmaster.columbia.edu

TLS Certificates (3)

Common Name	Issuer	Expires
`columbia.edu`	C=US, O=Google Trust Services, CN=WE1	Sat, 15 Aug 2026 09:34:03 +0000
`WE1`	C=US, O=Google Trust Services LLC, CN=GTS Root R4	Tue, 20 Feb 2029 14:00:00 +0000
`GTS Root R4`	C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA	Fri, 28 Jan 2028 00:00:42 +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 columbia.edu. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_c985a642f3722ae1
Output Hash: 00a7aa9e88bd8068cde79b4e37c587ff4da9a9600a4b42578a21440edbb0eceb
Signature: ed25519:cfd029f44efac7c53bc8635d803f90ee7df08b8a490f15cbf614859531a85353adf728fe150b0b7768c944447fd57156e7d1ec01263f66e5aed15237311d8a0c
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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