CONTINUOUS INTERNET TELEMETRY24H DRIFT2,851 material changesacross 2,531 domains · -547 vs yesterdayDNS DRIFT21 domains changed DNS providertop destination cloudflare.com · -6 vs yesterdayEMAIL DRIFT3 domains switched email providertop destination h-email.net · -3 vs yesterdayCERT DRIFT7 domains switched issuing CA24hNOW3,330 curated domains not answering-6,388 vs yesterdayERRORS10,947 responded with an errorlast probe · 5xx / 404 / 429 / 40324H DRIFT2,851 material changesacross 2,531 domains · -547 vs yesterdayDNS DRIFT21 domains changed DNS providertop destination cloudflare.com · -6 vs yesterdayEMAIL DRIFT3 domains switched email providertop destination h-email.net · -3 vs yesterdayCERT DRIFT7 domains switched issuing CA24hNOW3,330 curated domains not answering-6,388 vs yesterdayERRORS10,947 responded with an errorlast probe · 5xx / 404 / 429 / 403

tcpdf.org

Observed 2026-07-09T12:31:03.250Z (4d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now
Runs onCloudflare
96 subdomains · tranco_20k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat tcpdf.org actually stands on - every host below is a signed observation
tcpdf.org
A / AAAA
91.99.80.139
Cloudflareserves the site
NS
ns2.hover.comns1.hover.com
hover.comanswers its DNS
MX
mail.tcpdf.com
tcpdf.comreceives its email

HTTPS probe

ok Responding normally (2xx) 200 OK
HTTP status200
Servercloudflare
TLS protocolHTTP/3
TLS issuernot observed
Behind Cloudflareyes
Response time706 ms
DNS resolutionNOERROR

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

  • 91.99.80.139

MX 1

  • 10mail.tcpdf.com

TXT 1

  • v=spf1 ip4:91.99.80.139 a mx a:tecnick.com include:gmail.com ~all

NS 2

  • ns2.hover.com
  • ns1.hover.com

SOA 1

  • ns1.hover.com dnsmaster.hover.com

TLS Certificates (0)

None.

Subdomains (96)

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 tcpdf.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID
905ba53b-f3e7-4e54-993d-77c787efb1ab
Output Hash
645e078c04eb1c1a0c1b43681472e9ee29c91124bde4b4a9be834f37aec83940
Signature
ed25519:d1affa915c8e3a5cb5efbe1e2eba6ac94a772d7321fcc1876cb0fb29130958d0d432ce5d43c762ff644960fcee8c152f1b655186972773467b402db454419c04
Public Key
ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent
(genesis)
Plane
fast
Verify this in your browser