stumbleupon.com

Observed Jul 21, 2026, 20:05 UTC (2d 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 onAmazon

Email byGoogle Workspace

Secured byAmazon

Registered withMarkMonitor Inc.

tranco_5k

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

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

stumbleupon.com

A / AAAA

44.210.251.3150.16.176.6554.197.144.214

Amazonserves the site

ns-1116.awsdns-11.orgns-1950.awsdns-51.co.ukns-358.awsdns-44.comns-521.awsdns-01.net

awsdns-11.org + awsdns-51.co.uk + moreanswers its DNS

aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comalt1.aspmx.l.google.com+1 more

Google Workspacereceives its email

TLS

stumbleupon.com

Amazonissued its certificate

DNS Records

A 3

44.210.251.31
50.16.176.65
54.197.144.214

MX 5

1aspmx.l.google.com
10alt3.aspmx.l.google.com
10alt4.aspmx.l.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com

TXT 1

v=spf1 include:_spf.google.com ~all

NS 4

ns-1116.awsdns-11.org
ns-1950.awsdns-51.co.uk
ns-358.awsdns-44.com
ns-521.awsdns-01.net

SOA 1

ns-521.awsdns-01.net awsdns-hostmaster.amazon.com

TLS Certificates (3)

Common Name	Issuer	Expires
`stumbleupon.com`	C=US, O=Amazon, CN=Amazon RSA 2048 M01	Wed, 11 Nov 2026 23:59:59 +0000
`Amazon RSA 2048 M01`	C=US, O=Amazon, CN=Amazon Root CA 1	Fri, 23 Aug 2030 22:21:28 +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 stumbleupon.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_241ee5cce93a8a4a
Output Hash: 5bc907a5566cc50abccef32d28fa66ba92ac2f3a92bd83ce002b21f19d664edb
Signature: ed25519:d3612a2dbc9962cbeda429374b2ee3d27b08419bfa03d56e725c030150375083a1eeb9e16048979a48e0132b49c6c90f1331c6b50c7a02b105d98da182c1890f
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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