hackmd.io

Observed 2026-07-13T01:10:23.521Z (21h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byGoogle Workspace

Also usesGoogle Search Console1Password

IPv6 · 5 subdomains · tranco_20k

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

INFRASTRUCTURE MAPwhat hackmd.io actually stands on - every host below is a signed observation

hackmd.io

A / AAAA

99.83.179.17775.2.77.1522406:da14:88d:a101:c8b2:2a02:c2b4:6c182406:da14:88d:a102:3a52:6393:bfb4:2e3f+1 more

Cloudflareserves the site

ns-221.awsdns-27.comns-1444.awsdns-52.orgns-845.awsdns-41.netns-1925.awsdns-48.co.uk

awsdns-27.com + awsdns-52.org + moreanswers its DNS

aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comalt1.aspmx.l.google.com+1 more

Google Workspacereceives its email

HTTPS probe

ok Responding normally (2xx) 200 OK

HTTP status200

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time571 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

99.83.179.177
75.2.77.152

AAAA 3

2406:da14:88d:a101:c8b2:2a02:c2b4:6c18
2406:da14:88d:a102:3a52:6393:bfb4:2e3f
2406:da14:88d:a100:dfc7:ae2b:1027:a74

MX 5

1aspmx.l.google.com
10alt3.aspmx.l.google.com
10alt4.aspmx.l.google.com
5alt1.aspmx.l.google.com
5alt2.aspmx.l.google.com

TXT 13

apple-domain-verification=HnlQ3AxJK6XOBK37
linkedin-site-verification=5d31432e-bc68-4ef3-9cee-139129f957b4
google-site-verification=4C6HQbZYXANAOkpGxSjVMQ5Y2rnkxnDKI5foWeuv5tU
v=spf1 include:amazonses.com include:zoho.com include:servers.mcsv.net include:mail.zendesk.com include:mailgun.org include:_spf.google.com ~all
1password-site-verification=57QCQRGM55BBXPSVY7HZ2PLKJ4
google-site-verification=Yr_Bo_yeVoZeSEPkuJe4pugd0xb7gNecEcm0VauL3Xc
google-site-verification=d-uL-RwYIwGp2juReXK632sSBTtVCCKWghWmt2fC05s
cursor-domain-verification-2jk9c4=aMLb6LeKrCxC5zZDxaO6YViu0
MS=ms17207355
bw=8qGCJqfuH16sCug6AQzGtfUnzPCoeYlw2CtDDqrVUlQE

NS 4

ns-221.awsdns-27.com
ns-1444.awsdns-52.org
ns-845.awsdns-41.net
ns-1925.awsdns-48.co.uk

SOA 1

ns-221.awsdns-27.com awsdns-hostmaster.amazon.com

CAA 6

issuewild amazon.com
issuewild amazontrust.com
iodef mailto:support@hackmd.io
issuewild awstrust.com
issuewild amazonaws.com
issuewild letsencrypt.org

TLS Certificates (0)

None.

Subdomains (5)

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 hackmd.io. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 8a8c7876-a1df-446c-89c5-61c85a3534f9
Output Hash: c7adfb30ebda744e35f3c188a96ac1720798aa1a92104273142263b61aa92217
Signature: ed25519:a2c5bdb0bf6a15889b768f7c8e6816da0df7df251e90b4cb91b3d44e5ab2fbade3e711ea941de740260e5f28f046db7267aefa64d0e869dd74aa137988742a02
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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