columbia.com

Observed Aug 11, 2026, 01:59 UTC (3d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of columbia.com was taken 3d ago

columbia.com is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting columbia.com under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.

Watch columbia.com Watching a domain needs a DRM3 account. The reading above stays free and public either way.

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Up right now

Runs onCloudflare

Email byMicrosoft 365

Secured byDigiCert

Registered withMarkMonitor Inc.

Also usesDocuSignJamfBitwardenAirtableGc AiCursorMicrosoftTeamViewer

IPv6 · 1 subdomain · push_legacy

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

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

columbia.com

A / AAAA

104.18.67.112104.18.68.1122606:4700::6812:43702606:4700::6812:4470

Cloudflareserves the site

pdns1.ultradns.netpdns2.ultradns.netpdns3.ultradns.orgpdns4.ultradns.org+2 more

ultradns.net + ultradns.org + moreanswers its DNS

columbia-com.mail.protection.outlook.com

Microsoft 365receives its email

TLS

columbia.com

DigiCert Incissued its certificate

DNS Records

A 2

104.18.67.112
104.18.68.112

AAAA 2

2606:4700::6812:4370
2606:4700::6812:4470

MX 1

0columbia-com.mail.protection.outlook.com

TXT 29

MS=ms73399519
00DWB000008NokH=1TBWB0000000KOX
_dkt2x19pgqzs91115z7ea869hg1j34l
1146f980ea784356d44fa8fc04a6f625.columbia.com
docusign=61c3b2f7-d0d2-4100-afc1-db9099e0f984
jamf-site-verification=8xwmpY_1toxN3ds0Jpg_3A
bw=fMTAKpuO9i4MoazozYby6bltj5ZnN1hCyRI9NlPu3dOO
b47420b292ef17828a0950d3affc8b71cda92324df0701f0c5
airtable-verification=099df3384f94699900c8e2a7b8707826
cloudflare_dashboard_sso=d1d48741b7bc6d9e0bad6b42eb113354

NS 6

pdns1.ultradns.net
pdns2.ultradns.net
pdns3.ultradns.org
pdns4.ultradns.org
pdns5.ultradns.info
pdns6.ultradns.co.uk

SOA 1

pdns1.ultradns.net domainservices.columbia.com

SRV 3

expe1.columbia.com:5060 p10
expe1.columbia.com:5061 p10
use-p-uni-exe1.columbia.com:5269 p10

DMARC_RECORDS 1

v=DMARC1; p=reject; rua=mailto:dmarc_admin@columbia.com,mailto:dmarc_agg@vali.email; fo=1; adkim=s; aspf=s; pct=100

TLS Certificates (3)

Common Name	Issuer	Expires
`columbia.com`	C=US, O=DigiCert Inc, CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1	Wed, 17 Feb 2027 23:59:59 +0000
`DigiCert Global G2 TLS RSA SHA256 2020 CA1`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2	Mon, 23 Sep 2030 23:59:59 +0000
`DigiCert Global Root G2`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root CA	Sun, 09 Nov 2031 23:59:59 +0000

Subdomains (1)

www.columbia.com

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; the only network request the check makes is for the published public keys.

Verify this receipt

Ed25519 Receipt

Receipt ID: rcpt_fd322e0d582322f5
Output Hash: fb1fc9152ab78d7aa0fb7b63eff20b4ad46b4fd6e60a00d70e7d2c29d545b86a
Signature: ed25519:228bbe21b06d1eb7e533add111402939ebcf6f72a54e3b9b7d39ecc4fd71cfe36b2181ddfcc0a5432d3800ebaf6a036213ca30c02417f1c0ba5366b14b191908
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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Permalink: https://domaindrift.io/t/columbia.com