alex-math.ru

Observed Jul 23, 2026, 11:28 UTC (2d 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.

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Up right now

Secured byLet's Encrypt

2 subdomains · tranco

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

INFRASTRUCTURE MAPwhat alex-math.ru actually stands on - every host below is a signed observation

alex-math.ru

A / AAAA

82.202.137.13

unattributedserves the site

ns1.hosting.reg.runs2.hosting.reg.ru

reg.ruanswers its DNS

mx2.hosting.reg.rumx1.hosting.reg.ru

reg.rureceives its email

TLS

alex-math.ru

Let's Encryptissued its certificate

DNS Records

A 1

82.202.137.13

MX 2

20mx2.hosting.reg.ru
10mx1.hosting.reg.ru

TXT 2

v=spf1 ip4:194.58.93.247 ip4:31.31.197.21 a mx include:_spf.hosting.reg.ru ~all
v=DMARC1; p=none; aspf=r; sp=none

NS 2

ns1.hosting.reg.ru
ns2.hosting.reg.ru

SOA 1

sm27.hosting.reg.ru support.reg.ru

TLS Certificates (3)

Common Name	Issuer	Expires
`alex-math.ru`	C=US, O=Let's Encrypt, CN=YR1	Thu, 10 Sep 2026 06:27:25 +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 (2)

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 alex-math.ru. It updates itself. It attests a signed observation - not that the site is safe.

$DomainDrift signed-observation badge for alex-math.ru$

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

Ed25519 Receipt

Receipt ID: rcpt_abd487eb8598e0fc
Output Hash: 400935693459763f0d0f4dc6d27ba82b6d34d687d4b3ebb2fffdbda226259d70
Signature: ed25519:451bd6bbc3c2790d43e2b2b6b01c9a1c6942bf24dff25b5c84687dcfc0dd02a0d8caef2c01ab46b0e05ed14114d86ab64cae1425c26f357529f0b26cf747f701
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

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