artofproblemsolving.com

Observed 2026-07-12T10:12:04.216Z (1d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byGoogle Workspace

Registered withTucows Domains Inc.

Also usesGoogle Search ConsoleFacebook/Meta

IPv6 · 11 subdomains · tranco_40k

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

INFRASTRUCTURE MAPwhat artofproblemsolving.com actually stands on - every host below is a signed observation

artofproblemsolving.com

A / AAAA

104.20.40.144172.66.172.262606:4700:10::ac42:ac1a2606:4700:10::6814:2890

Cloudflareserves the site

ray.ns.cloudflare.comemma.ns.cloudflare.com

cloudflare.comanswers its DNS

aspmx2.googlemail.comalt2.aspmx.l.google.comaspmx5.googlemail.comaspmx.l.google.com+3 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 time65 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

104.20.40.144
172.66.172.26

AAAA 2

2606:4700:10::ac42:ac1a
2606:4700:10::6814:2890

MX 7

30aspmx2.googlemail.com
21alt2.aspmx.l.google.com
33aspmx5.googlemail.com
10aspmx.l.google.com
31aspmx3.googlemail.com
20alt1.aspmx.l.google.com
32aspmx4.googlemail.com

TXT 13

google-site-verification=N-v1SukFjS2tLUvMvwVmyQIHVR_nhItefzJFL6bjfxI
google-site-verification=MLvetiDDKdDoDwD0BJoNw1x3Z8KTJwrTzSlN3JaBjbA
facebook-domain-verification=zmmwg7oqqsqvf8ihckwvzoo85b08gx
cursor-domain-verification-mhhafy=eqGbMrcKXqX6djzB6zGipjj5u
google-site-verification=s9vftNg1k_VazUE_mei0G8x-hGKIo90grZdgIAJ5pCI
v=spf1 include:emsd1.com include:_spf.google.com include:sendgrid.net include:spf.tipalti.com ~all
google-site-verification=I8zBL4TTc5z8G78ZWfy5IuUJNjlBfD7Z33BBTud2lC0
anthropic-domain-verification-xjeek4=cteCbqWFXpO2MIWjAhjqVL4Ql
google-site-verification=bujm3xX2S_uWfnQr_CET-gMNg9846EwzaIBScrhQtpw
google-site-verification=qBxHCMUZxmm1kfdjJ2yHH34G2r91c46wFYZ3hob6iFk

NS 2

ray.ns.cloudflare.com
emma.ns.cloudflare.com

SOA 1

emma.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (0)

None.

Subdomains (11)

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 artofproblemsolving.com. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 5ecdc9d0-5fd5-499c-84e0-cd8f8a3079ba
Output Hash: 314acf6f28b7241d1a98bf199adbf451e3a19db8dd5ce4fcb9a8acee8b38a6e2
Signature: ed25519:e1ef37a0c4d5cf35f371edd0051b369f4b48c67122235bb9416dc61a204953ff435808bc22df6f8444b8009c3fbb91f4ee1c4efc788f8e70542fcf53a1968e0f
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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