slack.engineering

Observed Jul 18, 2026, 12:40 UTC (20h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onAutomattic

Secured byLet's Encrypt

1 subdomain · push_legacy

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

INFRASTRUCTURE MAPwhat slack.engineering actually stands on - every host below is a signed observation

slack.engineering

A / AAAA

192.0.66.216

Automatticserves the site

dns1.p03.nsone.netdns2.p03.nsone.netdns3.p03.nsone.netdns4.p03.nsone.net+4 more

nsone.net + slackdns.comanswers its DNS

TLS

slack.engineering

Let's Encryptissued its certificate

DNS Records

A 1

192.0.66.216

NS 8

dns1.p03.nsone.net
dns2.p03.nsone.net
dns3.p03.nsone.net
dns4.p03.nsone.net
ns01.slackdns.com
ns02.slackdns.com
ns03.slackdns.com
ns04.slackdns.com

SOA 1

dns1.p03.nsone.net hostmaster.nsone.net

TLS Certificates (2)

Common Name	Issuer	Expires
`slack.engineering`	C=US, O=Let's Encrypt, CN=E7	Sun, 16 Aug 2026 07:52:09 +0000
`E7`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Fri, 12 Mar 2027 23:59:59 +0000

Subdomains (1)

www.slack.engineering

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 slack.engineering. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: e8b76a04-9f1b-48d9-ae2b-12e8436dd375
Output Hash: cad965638eab5aea60545118ee80e7e104e914d2ee36e7963e7be89dffb3b47a
Signature: ed25519:9407668bacd59474e70932554fa8b915d5cee693b3e38deedb6609a5dc2af4afd3505266e53f6fb2c1c6935837667bb41491b38b476399e26b73efdfabb7a900
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/slack.engineering