castle.io

Observed 2026-07-12T14:35:23.219Z (10h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byGoogle Workspace

Also usesAtlassianNotionSlackGoogle Search Console

11 subdomains · tranco_40k

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

INFRASTRUCTURE MAPwhat castle.io actually stands on - every host below is a signed observation

castle.io

A / AAAA

75.2.60.5

Cloudflareserves the site

ns-77.awsdns-09.comns-712.awsdns-25.netns-1523.awsdns-62.orgns-1818.awsdns-35.co.uk

awsdns-09.com + awsdns-25.net + moreanswers its DNS

alt1.aspmx.l.google.comaspmx3.googlemail.comalt2.aspmx.l.google.comaspmx.l.google.com+1 more

Google Workspacereceives its email

HTTPS probe

ok Responding normally (2xx) 200 OK

HTTP status200

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time479 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

75.2.60.5

MX 5

5alt1.aspmx.l.google.com
10aspmx3.googlemail.com
5alt2.aspmx.l.google.com
1aspmx.l.google.com
10aspmx2.googlemail.com

TXT 14

atlassian-domain-verification=UY/0TSrRjscHkE1fc4j/5rI7zB9RazHmBuHPYh4ztGtkxj9AAdhqZeTsy8HaQolC
pardot785633=99843af77ca8b40fd9848ecea960ae5273e6553cf9c8dda7715fd73d99813de3
cursor-domain-verification-ncxc7z=L4W20HEwHElQXqC5Vs4xGzawp
notion-domain-verification=lo1quFPhllHDUZd4Amy1wgpX2kwIyMGy9ToRU20w7aA
status-page-domain-verification=2tdhk6csjrdd
_cf-custom-hostname.trust.castle.io=8a21ce8d-7e18-4ba3-9e28-83b8553632e3
MS=ms48872418
MS=2F280A3E3195E6CBA8451CEAFFD552779F0EE6DA
zapier-domain-verification-challenge=030bdedb-2af7-4746-8b8d-bee353091b00
slack-domain-verification=FPzPtYFkoNTD4FgWpCfrZqDyt9Ggnfs9ZnZ7YXj7

NS 4

ns-77.awsdns-09.com
ns-712.awsdns-25.net
ns-1523.awsdns-62.org
ns-1818.awsdns-35.co.uk

SOA 1

ns-1523.awsdns-62.org awsdns-hostmaster.amazon.com

TLS Certificates (0)

None.

Subdomains (11)

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 Connor observes and signs for castle.io. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 177c8e8a-ddb0-45bb-9af6-3ae99a418c18
Output Hash: aec19fef0f9e23935bf5258686af9ba2614852ab6cc65a4de0ae90c8aff51aa0
Signature: ed25519:088cb72b34b997a559fe1d57fd2f11fc5bf3f2fe54c9512115f6afa671a5ed20c6cd52d4a896e1ede433454c02c1dfe52ca54f5d2503bbc2efecae1423c3b204
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/castle.io