defcon.org

Observed Jul 18, 2026, 19:10 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Registered withGandi SAS

Also usesGoogle Search Console

IPv6 · 3 subdomains · tranco_100k

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

INFRASTRUCTURE MAPwhat defcon.org actually stands on - every host below is a signed observation

defcon.org

A / AAAA

50.230.231.782001:559:327:231::78

Cloudflareserves the site

dns-1.datamerica.comdns-3.datamerica.com

datamerica.comanswers its DNS

mail-2.datamerica.commail-1.datamerica.com

datamerica.comreceives its email

HTTPS probe

ok Responding normally (2xx) 200 OK

HTTP status200

Servercloudflare

TLS protocolHTTP/3

TLS issuernot observed

Behind Cloudflareyes

Response time49 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

50.230.231.78

AAAA 1

2001:559:327:231::78

MX 2

20mail-2.datamerica.com
10mail-1.datamerica.com

TXT 7

google-site-verification=d5Wqya3G077LcmFPN-VE5ZqQJxXCqKTgSkU1ATIJBks
security_contact=mailto:security@defcon.org
security_policy=https://defcon.org/html/links/disclosure-policy.html
v=spf1 a:mail-1.datamerica.com a:mail-2.datamerica.com -all
v=DMARC1; p=quarantine; aspf=r; adkim=r; fo=1; rf=afrf; ri=86400; pct=100; ruf=mailto:postmaster@defcon.org!7m; rua=mailto:postmaster@defcon.org!7m
v=STSv1; id=2019042001;
v=DNSSEC1; (detected)

NS 2

dns-1.datamerica.com
dns-3.datamerica.com

SOA 1

dns-1.datamerica.com hostmaster.defcon.org

CAA 1

issue harica.gr

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 defcon.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 4cfed644-c4c2-4500-866d-ce3fd7b4639d
Output Hash: b6173c49b394e981107d9b0b7132668c8aa80069bfda61fd30a5e0887caebe09
Signature: ed25519:8ed4e22151ad6d3cd5e49a3634be0fcd4958e3e62f68fc63a620debea80e907e7b4d8cc5062d83d70f04f736f0d01146ba900603c136a97587d25c865044cb06
Public Key: ed25519:7aad40f2d6399c207fe2fc15aade04a78324787a355d36725cc90687f9e10cff
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/defcon.org