stepik.org

Observed Jul 22, 2026, 00:44 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 onHLL

Email byGoogle (SPF sender)

Secured byLet's Encrypt

Registered withGoDaddy.com, LLC

Also usesGoogle Search Console

1 subdomain · tranco_40k

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

INFRASTRUCTURE MAPwhat stepik.org actually stands on - every host below is a signed observation

stepik.org

A / AAAA

178.248.239.111

HLLserves the site

ns77.domaincontrol.comns78.domaincontrol.com

domaincontrol.comanswers its DNS

mx.yandex.net

Google (SPF sender)receives its email

TLS

stepik.org

Let's Encryptissued its certificate

DNS Records

A 1

178.248.239.111

MX 1

10mx.yandex.net

TXT 6

yandex-verification: a4dbed4d96915f29
google-site-verification=F1_-uKpAc4KyTYHV6Ft_QOkSrfzPgyy_cv3Vw_hc7qc
v=spf1 mx ip4:40.113.130.203 ip4:51.250.53.246 ip4:40.119.132.203 ip4:104.47.158.169 include:mail.zendesk.com include:servers.mcsv.net include:_spf.google.com include:_spf.myjetbrains.com include:_spf.yandex.net ~all
yandex-verification: fa6a64e3034dc7b7
MS=ms61610138
v=DMARC1;p=none;rua=mailto:dmarc@stepik.org

NS 2

ns77.domaincontrol.com
ns78.domaincontrol.com

SOA 1

ns77.domaincontrol.com dns.jomax.net

SRV 1

autodiscover.secureserver.net:443 p0

TLS Certificates (2)

Common Name	Issuer	Expires
`stepik.org`	C=US, O=Let's Encrypt, CN=E8	Fri, 21 Aug 2026 20:56:50 +0000
`E8`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Fri, 12 Mar 2027 23:59:59 +0000

Subdomains (1)

www.stepik.org

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 stepik.org. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_26c1c19b075f749f
Output Hash: 8f405a9494fa098b27e4ac2f48d69baa9d3aa6bbc8eba0e60838eced3ef39dc2
Signature: ed25519:b9649801712115278cccb4fa50afff89e6fb1dc5a01b0102ab6b8c7f302ff565587f008e10dc2d57d85076b906f477ed109d6e2b4fec1b8b4cfe233b8bb05703
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/stepik.org