cost.eu

Observed Aug 11, 2026, 00:23 UTC (21h 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 onCloudflare

Email byMicrosoft 365

Secured byGoogle Trust Services

Also usesZoomAtlassianGoogle Search Console

IPv6 · tranco_100k

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

INFRASTRUCTURE MAPwhat cost.eu actually stands on - every host below is a signed observation

cost.eu

A / AAAA

104.26.0.183104.26.1.183172.67.69.722606:4700:20::681a:1b7+2 more

Cloudflareserves the site

peaches.ns.cloudflare.comvenkat.ns.cloudflare.com

cloudflare.comanswers its DNS

cost-eu.mail.protection.outlook.com

Microsoft 365receives its email

TLS

cost.eu

Google Trust Servicesissued its certificate

DNS Records

A 3

104.26.0.183
104.26.1.183
172.67.69.72

AAAA 3

2606:4700:20::681a:1b7
2606:4700:20::681a:b7
2606:4700:20::ac43:4548

MX 1

0cost-eu.mail.protection.outlook.com

TXT 9

BPL=4516673
Foxit-domain-verification=9b24781d7c5d736f125f8a5b8bb50dfa
MS=ms41215532
ZOOM_verify_3BEwCKw8Qwu9_MvBdcX3Zg
atlassian-domain-verification=dq87NDe3EAnQ2x+huGaoWzIqT6ZBkPW0aeYseV2J+B3RdoK9Gv2Cd6yZpyqnwIHZ
atlassian-sending-domain-verification=2573baab-b530-4d37-9648-0a930ef9ddee
bb4869757f04adfcf258eac53e8a8fc8
google-site-verification=b8hDEVQcFemOo_uzvrFGGJ3KTX7aaWMhQt93KJXqVfs
v=spf1 include:spf.ess.de.barracudanetworks.com include:spf.protection.outlook.com include:_spf.atlassian.net include:spf.mailjet.com ip4:212.35.100.228 ip4:168.63.103.231 -all

NS 2

peaches.ns.cloudflare.com
venkat.ns.cloudflare.com

SOA 1

peaches.ns.cloudflare.com dns.cloudflare.com

DMARC_RECORDS 1

v=DMARC1; p=none; fo=1; rua=mailto:IT.Administrator@cost.eu; ruf=mailto:IT.Administrator@cost.eu

BIMI_RECORDS 1

v=BIMI1; l=https://www.cost.eu/uploads/2026/02/COST.svg;

TLS Certificates (3)

Common Name	Issuer	Expires
`cost.eu`	C=US, O=Google Trust Services, CN=WE1	Thu, 01 Oct 2026 11:16:18 +0000
`WE1`	C=US, O=Google Trust Services LLC, CN=GTS Root R4	Tue, 20 Feb 2029 14:00:00 +0000
`GTS Root R4`	C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA	Fri, 28 Jan 2028 00:00:42 +0000

Subdomains (0)

None observed.

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; the only network request the check makes is for the published public keys.

Verify this receipt

Ed25519 Receipt

Receipt ID: rcpt_465413a6bcbe9307
Output Hash: f142f614baa8b2515ecf22553a21c7905da14ebd932826c6a63f3cb3e10cc244
Signature: ed25519:1328ee560978294987557554cccff771ee76e438ef1d439a1870d785fb98418de6c598138056e035cc0b079a92969f00a20319a946f6229701ed9a7fda7ef808
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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