upenn.edu

Observed 2026-07-17T19:46:23.106Z (15h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byProofpoint

Also usesDocuSignAtlassianGoogle Search Console

IPv6 · 5 subdomains · institutions

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

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

upenn.edu

A / AAAA

23.185.0.42620:12a:8000::42620:12a:8001::4

Cloudflareserves the site

dns2.udel.eduadns6.upenn.eduadns3.nnn.upenn.eduadns5.upenn.edu+4 more

udel.edu + upenn.eduanswers its DNS

mxa-00390e01.gslb.pphosted.commxb-00390e01.gslb.pphosted.com

Proofpointreceives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://www.upenn.edu/

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time171 ms

DNS resolutionNOERROR

Redirect chain

https://www.upenn.edu/

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

DNS Records

A 1

23.185.0.4

AAAA 2

2620:12a:8000::4
2620:12a:8001::4

MX 2

10mxa-00390e01.gslb.pphosted.com
10mxb-00390e01.gslb.pphosted.com

TXT 10

onetrust-domain-verification=114427d55783472c9c6399070d36a7a6
v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com include:spf.protection.outlook.com include:spf.penno365.isc.upenn.edu ~all
docusign=78297198-f708-4232-b63b-9ce516ae54a1
atlassian-domain-verification=maiZsC5JWjh1XYgMeCPA+Eu/1WPEcyn+n7TzXs5ukNzEV/GQRRHFl4jgohfUpHvV
google-site-verification=USSLz8fKaD900NdBD87OEjo0zVYS1RwVyebE0-rN1II
0850FA77764BD1CBAEEDDB31282A3244
anthropic-domain-verification-3mac1g=J3Hgt9mjdh1LaP7MtfIfyPJBv
KO71GJZC894IG1PGQC0AIXUV2G6A8EXBGSMTW1QX
v=DMARC1;p=none;fo=1;rua=mailto:dmarc_rua@emaildefense.proofpoint.com;ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com
v=DNSSEC1; (detected)

NS 8

dns2.udel.edu
adns6.upenn.edu
adns3.nnn.upenn.edu
adns5.upenn.edu
dns1.udel.edu
adns1.nnn.upenn.edu
adns2.nnn.upenn.edu
adns4.upenn.edu

SOA 1

ipam2.nnn.upenn.edu hostmaster.upenn.edu

TLS Certificates (0)

None.

Subdomains (5)

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 upenn.edu. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 44e512e3-f07f-4c9d-ab1b-0d0cb6ccd7d7
Output Hash: b9c469627bebc61a9b6b76c398c357693bf5ef433194a933a5ae4408271b4c0e
Signature: ed25519:78faf31896e8553269e68d5277d6bfd05ce09bb50e90c51d9ef1bb0c48a2ad9dc8696a8b97ec66d788fa0553128215de04582b846bc6d41a628d9ba0d3585201
Public Key: ed25519:7aad40f2d6399c207fe2fc15aade04a78324787a355d36725cc90687f9e10cff
Parent: (genesis)
Plane: fast

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