math.ru
Observed Aug 10, 2026, 20:18 UTC (4d ago). Every field below was attested with an Ed25519 signature at scan time.
math.ru is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting math.ru under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.
Watch math.ru Watching a domain needs a DRM3 account. The reading above stays free and public either way.
Let's Encrypt
Google Search ConsoleDNS Records
A 1
185.30.228.135
MX 1
10marple.mccme.ru
TXT 3
v=spf1 a mx ptr ip4:185.54.136.66 ?allgoogle-site-verification=GwuPzieHD24ehN9XTY4pJzzNy295N4LhGGOnes7NJH0yandex-verification: 3b95af957e14058e
NS 2
ns1.yandexcloud.netns2.yandexcloud.net
SOA 1
ns1.yandexcloud.net mx.cloud.yandex.net
DMARC_RECORDS 1
v=DMARC1; p=reject; adkim=r; aspf=r;
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
2016.edu.olimpiada.ru |
C=US, O=Let's Encrypt, CN=YR1 | Thu, 29 Oct 2026 20:07:52 +0000 |
YR1 |
C=US, O=ISRG, CN=Root YR | Sat, 02 Sep 2028 23:59:59 +0000 |
Root YR |
C=US, O=Internet Security Research Group, CN=ISRG Root X1 | Thu, 02 Sep 2032 23:59:59 +0000 |
Subdomains (0)
None observed.
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; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_aa5774d74e30edac- Output Hash
7dda2bd887fd6fdef2b2b15409e1a72ef6af4eadab07f57233ef427b01d184ab- Signature
ed25519:c4028b0cea5ea72201f4a36f4356c69fb3e126c4cd968fd53e5d0dcd284a4bfea3c7edbccf45e5ced213f396482e2e6d46653283a389c2ffdf6b6cce3fb35503- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast