duosecurity.com

Observed 2026-07-15T05:26:56.605Z (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byGoogle (SPF sender)

Registered withMarkMonitor Inc.

Also usesAtlassianGoogle Search Console

94 subdomains · tranco_5k

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

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

duosecurity.com

A / AAAA

18.160.143.7018.160.143.12718.160.143.1918.160.143.44

Cloudflareserves the site

ns-1271.awsdns-30.orgns-1600.awsdns-08.co.ukns-272.awsdns-34.comns-896.awsdns-48.net

awsdns-30.org + awsdns-08.co.uk + moreanswers its DNS

alln-mx-01.cisco.comrcdn-mx-01.cisco.comaer-mx-01.cisco.com

Google (SPF sender)receives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://duo.com/

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time159 ms

DNS resolutionNOERROR

Redirect chain

https://duo.com/

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 4

18.160.143.70
18.160.143.127
18.160.143.19
18.160.143.44

MX 3

10alln-mx-01.cisco.com
20rcdn-mx-01.cisco.com
30aer-mx-01.cisco.com

TXT 16

MS=ms87573650
apple-domain-verification=2Vf56S4tuuskojVe
hcp-domain-verification=2864ca4b8eab48057506880821e0203db32c5c2c09a71425ae6d5a1dfe8cb22c
status-page-domain-verification=wl6tj66k5qh5
z5c69y4b0q179syyqltskhhsrtndrx6m
atlassian-domain-verification=R4UtYgXtORXRKnMUBQS0AFJD3EAxj2HTgORPt6C1/GLPaTOI7alUkMvuq/3ABby8
_vz1bepjjh5vfz1kdz31jma6hzwg20ny
duo_sso_verification=kuyK6IAuOS7ombaHhSEWM0gFk2Ja0oUHefceWQT7z4uU8rWqw8DjuTsUtmdRT6xd
ygl4n9zvmlf74mcbbc8nmcr3wv915q7g
_k6higb2z1hho56o41tneh9qzuuezz9o

NS 4

ns-1271.awsdns-30.org
ns-1600.awsdns-08.co.uk
ns-272.awsdns-34.com
ns-896.awsdns-48.net

SOA 1

ns-1600.awsdns-08.co.uk awsdns-hostmaster.amazon.com

CAA 10

issue amazonaws.com
issue globalsign.com
issue digicert.com
issue awstrust.com
issue amazon.com
issue letsencrypt.org
issue starfieldtech.com
issue identrust.com
issue pki.goog
issue amazontrust.com

TLS Certificates (0)

None.

Subdomains (94)

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 duosecurity.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 1b0120fd-e20a-4deb-bdab-b517695c783e
Output Hash: a5c8b053e6f9331589502fa8212d06943f8b42b4695bbbfba604ac540427394c
Signature: ed25519:4bd9ba24a3350b339161ad80efe778205d0eb8955fae33e79664b3eddfd58f3ea964af2dd232bd3b95f8222512be5b2b7048b52a3b856d2fc6a4ffef5a675402
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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