slackhq.com

Observed Jul 18, 2026, 12:40 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onAutomattic

Secured byLet's Encrypt

Registered withMarkMonitor Inc.

1 subdomain · push_legacy

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

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

slackhq.com

A / AAAA

192.0.66.2

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

slackhq.com

Let's Encryptissued its certificate

DNS Records

A 1

192.0.66.2

TXT 3

pardot755253=d6a9618fca68ffba1d0dc61980201bf41bb32f5c1a46a49d72a3727427dc1d4b
v=spf1 -all
v=DMARC1; p=quarantine; rua=mailto:6h0wb1pg@ag.dmarcian.com;

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 (4)

Common Name	Issuer	Expires
`slackhq.com`	C=US, O=Let's Encrypt, CN=YE1	Thu, 01 Oct 2026 19:49:59 +0000
`YE1`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

www.slackhq.com

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

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

Ed25519 Receipt

Receipt ID: 6c15a0f3-460f-434a-9c37-bc6c616b535f
Output Hash: 1ec33085ce3a240f5e91d29e5940cbe3fcf81b8e31c2825f9b4beaa5fcde35ac
Signature: ed25519:76f3fd7f968fd7248cf4bcb3d85e9ec65aff17615e0ede4192abdfdf67e2da61cf534edd003800875c770d0792e052e822270d651263b197e9e66f99838aa707
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/slackhq.com