ringzer0ctf.com

Observed Jul 27, 2026, 19:18 UTC (5d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Email byGoogle Workspace

Secured byLet's Encrypt

Also usesGoogle Search Console

domcop

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

INFRASTRUCTURE MAPwhat ringzer0ctf.com actually stands on - every host below is a signed observation

ringzer0ctf.com

A / AAAA

45.45.148.200

unattributedserves the site

ns1.zabbly.comns2.zabbly.com

zabbly.comanswers its DNS

aspmx.l.google.comalt1.aspmx.l.google.comalt2.aspmx.l.google.comalt3.aspmx.l.google.com+1 more

Google Workspacereceives its email

TLS

ringzer0ctf.com

Let's Encryptissued its certificate

DNS Records

A 1

45.45.148.200

MX 5

1aspmx.l.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com
10alt3.aspmx.l.google.com
10alt4.aspmx.l.google.com

TXT 5

FLAG-305l9RR202HG695t6Y8ZU77xyq
v=spf1 include:_spf.google.com ~all
1VR0DekIWV_hxeVmj3RDZMmg2TRnDin5ltO9AJM_u1s
google-site-verification=2VqXKiBrx_DOcV-E-4RgHYtCiCVGgZM42FKl_DlJqHk
v=DMARC1; p=quarantine

NS 2

ns1.zabbly.com
ns2.zabbly.com

SOA 1

samba03.stgraber.net hostmaster.stgraber.net

TLS Certificates (4)

Common Name	Issuer	Expires
`ringzer0ctf.com`	C=US, O=Let's Encrypt, CN=YR2	Sun, 30 Aug 2026 10:57:37 +0000
`ringzer0ctf.com`	C=US, O=Let's Encrypt, CN=YR2	Sun, 30 Aug 2026 10:57:37 +0000
`YR2`	C=US, O=ISRG, CN=Root YR	Sat, 02 Sep 2028 23:59:59 +0000
`Root YR`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (0)

None observed.

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 ringzer0ctf.com. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/ringzer0ctf.com">
  <img src="https://domaindrift.io/badge/ringzer0ctf.com.svg"
       width="300" height="64" alt="DomainDrift signed observations for ringzer0ctf.com">
</a>

Ed25519 Receipt

Receipt ID: rcpt_cb8f3f944d4181f8
Output Hash: c270da1c6e7ee0a33a0a47bc99f55534763d4342ba78425f800706be56a2984d
Signature: ed25519:483e9fac79039944f7b96ac4faf0d44033bb219597900e182e5d690a3e82c3b77e3d9f2f9f0d14efe655055525b6ed55ba4e2113403851142768000b81e37b02
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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