arctic.ac

Observed Jul 22, 2026, 23:39 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.

Verify this receipt yourself + Watch this domain

Up right now

Email byMicrosoft 365

Secured byLet's Encrypt

Also usesGoogle Search Console

2 subdomains · tranco

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

INFRASTRUCTURE MAPwhat arctic.ac actually stands on - every host below is a signed observation

arctic.ac

A / AAAA

212.53.157.236

unattributedserves the site

ns-de.1and1-dns.bizns-de.1and1-dns.dens-de.1and1-dns.orgns-de.1and1-dns.com

1and1-dns.biz + 1and1-dns.de + moreanswers its DNS

arctic-ac.mail.protection.outlook.com

Microsoft 365receives its email

TLS

arctic.ac

Let's Encryptissued its certificate

DNS Records

A 1

212.53.157.236

MX 1

0arctic-ac.mail.protection.outlook.com

TXT 5

apple-domain-verification=eVEumu7wOoaUfObg
google-site-verification=YLmOjuK2nrhbptA8mYbNBOq46oNssFD_mZfH1NFnLKo
MS=ms17817157
v=spf1 ip4:46.4.123.233 ip4:212.53.157.236 ip4:40.113.200.201 ip4:61.238.132.130 include:_spf.perfora.net include:_spf.kundenserver.de include:spf.protection.outlook.com ~all
v=DMARC1;p=reject;sp=quarantine;rua=mailto:dmarc@arctic.ac;ruf=mailto:dmarc@arctic.ac

NS 4

ns-de.1and1-dns.biz
ns-de.1and1-dns.de
ns-de.1and1-dns.org
ns-de.1and1-dns.com

SOA 1

ns-de.1and1-dns.de hostmaster.kundenserver.de

CAA 1

issuewild "letsencrypt.org"

TLS Certificates (3)

Common Name	Issuer	Expires
`arctic.ac`	C=US, O=Let's Encrypt, CN=YR2	Wed, 16 Sep 2026 06:02:05 +0000
`YR2`	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 arctic.ac. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_460091370f90ac46
Output Hash: 8803b22b35ef0cf5984750be44618b20e1872b076bb341616b3ec0fc8b5d1f30
Signature: ed25519:b66e9d34f58f9f149a41332f6163e4a1643544e82f9172dd97015d6e42fa0054ef4962ae40425f8a719fae4e2975c5c97bb379b679a10753e1a9746875e7be06
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/arctic.ac