merck.ca

Observed Aug 11, 2026, 12:40 UTC (4d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of merck.ca was taken 4d ago

merck.ca is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting merck.ca under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.

Watch merck.ca Watching a domain needs a DRM3 account. The reading above stays free and public either way.
Up right now
Secured byLet's Encrypt
Also usesGoogle Search ConsoleLinkedIn
1 subdomain · majestic
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat merck.ca actually stands on - every host below is a signed observation
merck.ca
A / AAAA
192.0.66.136
unattributedserves the site
NS
ns-1041.awsdns-02.orgns-1624.awsdns-11.co.ukns-315.awsdns-39.comns-823.awsdns-38.net
awsdns-02.org + awsdns-11.co.uk + moreanswers its DNS
MX
marvin.merck.comwily.merck.com
merck.comreceives its email
TLS
merck.ca
Let's Encryptissued its certificate

DNS Records

A 1

  • 192.0.66.136

MX 2

  • 0marvin.merck.com
  • 0wily.merck.com

TXT 5

  • google-site-verification=IZWH23cEKtKDmSyPXGS0ZDc3j9oIafM5ZVJpxr-Gixc
  • linkedin-site-verification=a1c2db75-7811-4435-91cb-0627aaad2a10
  • sbxppqdrzffmfdfkr73w951c8qhmb35d
  • spf2.0/pra ip4:81.91.104.0/24 include:cust-senderid.exacttarget.com -all
  • v=spf1 ip4:81.91.104.0/24 include:cust-spf.exacttarget.com -all

NS 4

  • ns-1041.awsdns-02.org
  • ns-1624.awsdns-11.co.uk
  • ns-315.awsdns-39.com
  • ns-823.awsdns-38.net

SOA 1

  • ns-1041.awsdns-02.org awsdns-hostmaster.amazon.com

DMARC_RECORDS 1

  • v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:dcm_rua_reports@merck.com; ruf=mailto:dcm_ruf_reports@merck.com

TLS Certificates (4)

Common NameIssuerExpires
merck.ca C=US, O=Let's Encrypt, CN=YE2 Fri, 02 Oct 2026 16:24:13 +0000
YE2 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)

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; the only network request the check makes is for the published public keys.

Verify this receipt

Ed25519 Receipt

Receipt ID
rcpt_4ad6abb960886cff
Output Hash
b75aefcd5707a59ae695c1f30c1de01f8c30417d1becfa49deda026362d1f82d
Signature
ed25519:a0b09531672015d7ed507538fccfb42a5b585aa9a8e481f745a0fa4d411707e2e4f552384a10945be416ba47f0281ee44d9a5af4eb18eb9da77f6d185fc5ec07
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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CONTINUOUS INTERNET TELEMETRY24H DRIFT41,624 material changesacross 40,171 domains · 24h to ~2h ago · -1,883 vs yesterdayROTATION65 domains moved DNS from magpiedns.com to koaladns.com, 57 moved backa rotation loop, not a migration · 24hNOW495 curated domains not reachablelast probe, steadySITE ERRORS36,299 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 117,570 sites429 rate-limit / 403 bot-block, a posture signal