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mathoverflow.net

Observed Jul 22, 2026, 01:15 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation — watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain
Up right now
Runs onCloudflare
Email byGoogle Workspace
Secured byLet's Encrypt
Registered withGoDaddy.com, LLC
Also usesGoogle Search Console
tranco_40k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat mathoverflow.net actually stands on - every host below is a signed observation
mathoverflow.net
A / AAAA
198.252.206.1
Cloudflareserves the site
NS
damian.ns.cloudflare.comsureena.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
aspmx.l.google.comalt3.aspmx.l.google.comalt4.aspmx.l.google.comalt1.aspmx.l.google.com+1 more
Google Workspacereceives its email
TLS
mathoverflow.net
Let's Encryptissued its certificate

DNS Records

A 1

  • 198.252.206.1

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 2

  • google-site-verification=Oor77iaEIbiS-miSy9oXc8kM4J9IXwfgDpF7YPkEy5U
  • v=spf1 include:_spf.google.com -all

NS 2

  • damian.ns.cloudflare.com
  • sureena.ns.cloudflare.com

SOA 1

  • damian.ns.cloudflare.com dns.cloudflare.com

CAA 13

  • issue "comodoca.com"
  • issue "digicert.com; cansignhttpexchanges=yes"
  • issue "letsencrypt.org"
  • issue "pki.goog; cansignhttpexchanges=yes"
  • issue "sectigo.com"
  • issue "ssl.com"
  • issuewild "comodoca.com"
  • issuewild "digicert.com; cansignhttpexchanges=yes"
  • issuewild "letsencrypt.org"
  • issuewild "pki.goog; cansignhttpexchanges=yes"

TLS Certificates (4)

Common NameIssuerExpires
mathoverflow.net C=US, O=Let's Encrypt, CN=YE2 Thu, 03 Sep 2026 16:02:16 +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 (0)

None observed.

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 mathoverflow.net. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID
rcpt_8f103ef144d899ef
Output Hash
b657c072be455a032ccebc6074fb12eab4ce4d9296a63c5a26151d00b51e2b28
Signature
ed25519:c03b0039fd14f92fb2dbb43f9a515c36b967ae168b015fec87504fe7e9d457955752275ed0e37f73cd0e3d6ca839a679f2c463e354bce42f67034af4559c5002
Public Key
ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent
(genesis)
Plane
fast
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