CONTINUOUS INTERNET TELEMETRY24H DRIFT1,180 material changesacross 969 domains · -898 vs yesterdayDNS DRIFT3 domains changed DNS providertop destination ac.in · -12 vs yesterdayNOW2,317 curated domains not answering+1,191 vs yesterdayERRORS15,700 responded with an errorlast probe · 5xx / 404 / TLSTHROTTLED39,798 throttled or blocked our scanner429 rate-limit / 403 bot-block24H DRIFT1,180 material changesacross 969 domains · -898 vs yesterdayDNS DRIFT3 domains changed DNS providertop destination ac.in · -12 vs yesterdayNOW2,317 curated domains not answering+1,191 vs yesterdayERRORS15,700 responded with an errorlast probe · 5xx / 404 / TLSTHROTTLED39,798 throttled or blocked our scanner429 rate-limit / 403 bot-block

postmark.com

Observed Jul 18, 2026, 12:22 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now
Runs onCloudflare
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 postmark.com actually stands on - every host below is a signed observation
postmark.com
A / AAAA
3.131.150.69
Cloudflareserves the site
NS
ns1.dnsimple.comns2.dnsimple-edge.netns3.dnsimple.comns4.dnsimple-edge.org
dnsimple.com + dnsimple-edge.net + moreanswers its DNS
TLS
www.postmark.com
Let's Encryptissued its certificate

DNS Records

A 1

  • 3.131.150.69

NS 4

  • ns1.dnsimple.com
  • ns2.dnsimple-edge.net
  • ns3.dnsimple.com
  • ns4.dnsimple-edge.org

SOA 1

  • ns1.dnsimple.com admin.dnsimple.com

TLS Certificates (4)

Common NameIssuerExpires
www.postmark.com C=US, O=Let's Encrypt, CN=YE2 Tue, 22 Sep 2026 08:47:40 +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; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for postmark.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID
d7631582-d6ac-4411-b03f-1868951b84a0
Output Hash
496cb1fae9ad0192ded2df1b4301e81b341b56791868c16d51a56d4fe453c20b
Signature
ed25519:093fa331d57f9ae30d05c3d3e1b2b47a42a5641d706853dc2098a2f48445afbc757fbdc34bd88d9d837f5920aff1830215d2ff68335a69866cd7443370dd5506
Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent
(genesis)
Plane
fast
Verify this in your browser