merck.com

Observed Jul 21, 2026, 19:11 UTC (3d 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

Runs onAutomattic

Email byMicrosoft 365

Secured byLet's Encrypt

Registered withMarkMonitor Inc.

Also uses1PasswordDockerFacebook/MetaGoogle Search ConsoleAtlassian

1 subdomain · healthcare

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

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

merck.com

A / AAAA

192.0.66.119

Automatticserves the site

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

nsone.net + msddns.comanswers its DNS

msdcloud.mail.protection.outlook.com

Microsoft 365receives its email

TLS

merck.com

Let's Encryptissued its certificate

DNS Records

A 1

192.0.66.119

MX 1

0msdcloud.mail.protection.outlook.com

TXT 63

MS=ms73390276
MS=ms81705768
44e4c91b36f190hu3vc5j589r
20q8kh5vb8lc34dg17lk07rh5n
2a6hcn5keoukshbma518dg69a5
2mjbhlht9j0g3928i2oe5nqi6a
76dkj9u7598f7503gp8j9thda8
ehklccfrmqtog011qavchou5oo
jlvgnenmenn78fup62soefgcph
8gcvl81vgkbcnq6nz80f12rq0cy438h2

NS 8

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

SOA 1

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

SRV 1

uswhst1-am1vcse.merck.com:5061 p10

TLS Certificates (4)

Common Name	Issuer	Expires
`merck.com`	C=US, O=Let's Encrypt, CN=YE1	Fri, 25 Sep 2026 13:39:46 +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.merck.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 merck.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_e18417d70d88686b
Output Hash: 527ae38b19174bf21d694d917be88bb5ccb57524607aa79098df7a204eb9bd07
Signature: ed25519:e186f2acfa7e2d9393d1c9b58cd97e022fd20ef3e90033d33f82b5c4228827f0ff3198f0d31c17f2d6081975d022214ed2c090daefec08b9fd56d5229b104304
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

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