certum.pl

Observed 2026-07-13T23:05:32.235Z (1h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byMicrosoft 365

8 subdomains · tranco_10k

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

INFRASTRUCTURE MAPwhat certum.pl actually stands on - every host below is a signed observation

certum.pl

A / AAAA

213.222.201.184

Cloudflareserves the site

a22-67.akam.neta1-222.akam.neta11-66.akam.neta16-64.akam.net

akam.netanswers its DNS

sec.mx.certum.plpri.mx.certum.plcertum-pl.mail.protection.outlook.com

Microsoft 365receives its email

HTTPS probe

redirect Redirecting (3xx) 302 → https://www.certum.pl/pl/

HTTP status302

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time1239 ms

DNS resolutionNOERROR

Redirect chain

https://www.certum.pl/pl/

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

213.222.201.184

MX 3

20sec.mx.certum.pl
10pri.mx.certum.pl
0certum-pl.mail.protection.outlook.com

TXT 5

e73733cb8e798813ae0da06b9708d3b524952464e3c2c8a1e6eff96bb130751
mojecertpl-site-verification-1XyyfB1gkJGwpo1px2rj76P2otrIOr4q
MS=ms38611329
v=spf1 ip4:213.222.201.98 ip4:213.222.198.98 -all
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:dmarc@assecodspl.uriports.com; ruf=mailto:dmarc@assecodspl.uriports.com; fo=1:d:s

NS 4

a22-67.akam.net
a1-222.akam.net
a11-66.akam.net
a16-64.akam.net

SOA 1

a1-222.akam.net tech.certum.pl

TLS Certificates (0)

None.

Subdomains (8)

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 certum.pl. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: 0d966dd8-3db9-4f52-ac54-a786e5917826
Output Hash: ee1cf83e52f357afb11e7f73a041afa7f0b0f4a82a836cc61c8830dbda0da515
Signature: ed25519:85f077fa6e97312aebbdb518e34702816b0b6c4ca328d3c1e588ca0c70a678cd931f7d1876d9ccf27d6ffcdce85a1b33b0691bb46ba424195e6ca18fc4739804
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/certum.pl