cerf.net

Observed 2026-07-10T12:18:03.242Z (6d ago). Every field below was attested with an Ed25519 signature at scan time.

Not responding

Runs onCloudflare

Email byProofpoint

Registered withCSC Corporate Domains, Inc.

3 subdomains · tranco_40k

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

INFRASTRUCTURE MAPwhat cerf.net actually stands on - every host below is a signed observation

cerf.net

ns-west.cerf.netns-east.cerf.net

cerf.netanswers its DNS

mxa-00191d01.gslb.pphosted.commxb-00191d01.gslb.pphosted.com

Proofpointreceives its email

HTTPS probe

server_error Server error (5xx) 530 Server Error

HTTP status530

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time116 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

MX 2

10mxa-00191d01.gslb.pphosted.com
10mxb-00191d01.gslb.pphosted.com

TXT 1

v=DMARC1; p=none; fo=1; rua=mailto:att@rua.agari.com; ruf=mailto:att@ruf.agari.com

NS 2

ns-west.cerf.net
ns-east.cerf.net

SOA 1

ns-west.cerf.net rm-hostmaster.ems.att.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 cerf.net. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: e813396d-70f1-4de0-bd4e-1e2b862f8032
Output Hash: 23ff38c432e6b9d28f71d8f2952fd9da97b518fff17eb81fe76966651032bd4a
Signature: ed25519:28635976c67ac1b6154157634b5777d702bcc7a2e1c9b63efd8203cea207249f499c37a50f4d35858894071a2936243b907ceca2d3222eba9dfa71449206c302
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/cerf.net