CONTINUOUS INTERNET TELEMETRY24H DRIFT1,210 material changesacross 994 domains · -868 vs yesterdayDNS DRIFT3 domains changed DNS providertop destination ac.in · -12 vs yesterdayNOW2,362 curated domains not answering+1,236 vs yesterdayERRORS15,694 responded with an errorlast probe · 5xx / 404 / TLSTHROTTLED39,548 throttled or blocked our scanner429 rate-limit / 403 bot-block24H DRIFT1,210 material changesacross 994 domains · -868 vs yesterdayDNS DRIFT3 domains changed DNS providertop destination ac.in · -12 vs yesterdayNOW2,362 curated domains not answering+1,236 vs yesterdayERRORS15,694 responded with an errorlast probe · 5xx / 404 / TLSTHROTTLED39,548 throttled or blocked our scanner429 rate-limit / 403 bot-block

mdbook.cn

Observed Jul 18, 2026, 23:45 UTC (16h ago). Every field below was attested with an Ed25519 signature at scan time.

Not responding
Runs onCloudflare
IPv6 · 96 subdomains · tranco_100k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat mdbook.cn actually stands on - every host below is a signed observation
mdbook.cn
A / AAAA
104.21.50.166172.67.207.1192606:4700:3034::ac43:cf772606:4700:3035::6815:32a6
Cloudflareserves the site
NS
elsa.ns.cloudflare.comridge.ns.cloudflare.com
cloudflare.comanswers its DNS

HTTPS probe

timeout No response within the timeout Connection timed out - no response within 3s
HTTP status0
Servernot observed
TLS protocolnot observed
TLS issuernot observed
Behind Cloudflareno
Response time6201 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 2

  • 104.21.50.166
  • 172.67.207.119

AAAA 2

  • 2606:4700:3034::ac43:cf77
  • 2606:4700:3035::6815:32a6

NS 2

  • elsa.ns.cloudflare.com
  • ridge.ns.cloudflare.com

SOA 1

  • elsa.ns.cloudflare.com dns.cloudflare.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 mdbook.cn. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID
64d0aa66-3258-4d26-afd5-77c30ef0f77d
Output Hash
9781e2b5a028bf93bc1b951ddf7f92b86ff676289919e39fa3e07fe8c38ca95f
Signature
ed25519:405d5ee6a4cc14ec08af4c504290b2a05f01500ab084b3ea997420d5a960975495509015fa277b86e06cab3bec9f07a8e3c5fad6154beb1f6565225aa1cb070a
Public Key
ed25519:7aad40f2d6399c207fe2fc15aade04a78324787a355d36725cc90687f9e10cff
Parent
(genesis)
Plane
fast
Verify this in your browser