questia.com

Observed 2026-07-14T21:53:06.724Z (21h ago). Every field below was attested with an Ed25519 signature at scan time.

Not responding

Runs onCengage Learning

Email byProofpoint

Registered withKey-Systems GmbH

tranco_40k

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

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

questia.com

A / AAAA

69.32.208.15

Cengage Learningserves the site

ns1x.cengage.netns2x.cengage.net

cengage.netanswers its DNS

mxb-0012df01.gslb.pphosted.commxa-0012df01.gslb.pphosted.com

Proofpointreceives 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 time6201 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

69.32.208.15

MX 2

10mxb-0012df01.gslb.pphosted.com
10mxa-0012df01.gslb.pphosted.com

TXT 3

MS=ms21994581
v=spf1 include:spf.cengage.com -all
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com

NS 2

ns1x.cengage.net
ns2x.cengage.net

SOA 1

ns1x.cengage.net hostmaster.ohcinmason.com

TLS Certificates (0)

None.

Subdomains (3)

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

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

Ed25519 Receipt

Receipt ID: 02eedd18-42ec-4b5f-9e6e-70dbae5ef979
Output Hash: 77f4800a50886004e811fa789ad9ceaed3985527b9b83b1191c60eb3daf81f49
Signature: ed25519:8f7c9a7b3fe3f0f3db886a021444caea025a8dfedc4e6d87fc348a97e95e3b34111d73e193f715ae81c41503f6e797c87f38360789fe173cf5428c878eb90704
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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