caltech.edu

Observed 2026-07-15T09:10:22.112Z (15h ago). Every field below was attested with an Ed25519 signature at scan time.

Not responding

Runs onAmazon

Email byAmazon SES

Also uses1PasswordZoom

18 subdomains · institutions

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

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

caltech.edu

A / AAAA

52.26.125.194

Amazonserves the site

ns0090.secondary.cloudflare.comns0239.secondary.cloudflare.com

cloudflare.comanswers its DNS

mx1.caltech.iphmx.commx2.caltech.iphmx.com

Amazon SESreceives its email

HTTPS probe

timeout No response within the timeout Connection timed out - no response within 3s

HTTP status0

Servernot observed

TLS protocolnot observed

TLS issuernot observed

Behind Cloudflareno

Response time6200 ms

DNS resolutionNOERROR

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

DNS Records

A 1

52.26.125.194

MX 2

10mx1.caltech.iphmx.com
10mx2.caltech.iphmx.com

TXT 16

autodesk-domain-verification=TtWEzwdFn86i9o8NX_8R
1password-site-verification=VRLN67QMNNEPXIIREL6TDZABF4
openai-domain-verification=dv-8LkNkbqCFWsyOdGQbgXugk2j
adobe-idp-site-verification=1e150df049a820e49156727d1b84c48a1ae11f66f87ad76d2cf30cb9d378acb6
MS=ms43712753
iContact1389932
anthropic-domain-verification-rw8528=rFwrZAPawzCVNGD318e9zzavQ
amazonses:X9y0RbFXXvxu3ft83xg2e+YV++OUePTUSeCOdB3Chjg=
apple-domain-verification=KD7b3wNXe76BHRAV
v=spf1 ip4:131.215.0.0/16 ip4:134.4.0.0/16 ip4:192.100.16.0/24 ip4:198.129.208.0/23 ip4:208.69.128.0/22 ip4:199.188.184.0/22 ip4:198.202.125.128/25 ip4:74.122.104.0/22 ip4:72.10.184.102 ip4:72.10.184.103 ip4:72.10.182.15 ip4:72.10.182.16 include:spf.protection.outlook.com include:sendgrid.net include:mktomail.com include:spf.dynect.net include:cust-spf.cashnet.com include:amazonses.com include:_spf.createsend.com include:_spf01.mykronos.com include:_s0.caltech.edu ?all

NS 2

ns0090.secondary.cloudflare.com
ns0239.secondary.cloudflare.com

SOA 1

ns0090.secondary.cloudflare.com hostmaster.caltech.edu

TLS Certificates (0)

None.

Subdomains (18)

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

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

Ed25519 Receipt

Receipt ID: 98fb1a25-8ebc-4bdc-b454-85f3ee664ec9
Output Hash: 2f57eb69a6446f9b3fb3307546aa8184603ce85c78c5db51b3fa679b6936cb89
Signature: ed25519:2b3f2ddeff5ee78ac57f2385cad052b5279fccd0e23947260aafba5acbd45a619a2e09dbdb64d64be06a59e3936d2f427ef91be5fcf26eda991717ab91970e03
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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