rsa.org.uk

Observed Jul 26, 2026, 06:26 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 byAmazon SES

Secured byZeroSSL GmbH

majestic

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

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

rsa.org.uk

A / AAAA

217.19.248.132

unattributedserves the site

elma.ns.cloudflare.comjames.ns.cloudflare.com

cloudflare.comanswers its DNS

mx1-eu.emailsecurity.appmx2-eu.emailsecurity.app

Amazon SESreceives its email

TLS

rsa.org.uk

ZeroSSL GmbHissued its certificate

DNS Records

A 1

217.19.248.132

MX 2

10mx1-eu.emailsecurity.app
20mx2-eu.emailsecurity.app

TXT 7

access-domain-verification=208ab8e673c2f2ab2c6da51f05a284c47041475a3287004adc99d0867d78ce6d
anthropic-domain-verification-cwgmdh=nVjYvXhzhlPCz5Xj2B4YrF4t2
nU6rH2Vqjb8DKyqxVaX5b/g15sbna8FAxwyPzN06whIT4A6GteHKAm218r2oYcmkAqNjGQ1z9V2iP21oV/FHmA==
nordpass-domain-verification=cb77a86e4621e50f649f321eb8d04cfce2b0c679c094b15a7561678b298b53f3
openai-domain-verification=dv-kCi0GaDSWeYfEL5dL4Qc3xSA
v=spf1 ip4:167.89.65.75 ip4:24.110.76.214 ip4:24.110.76.215 ip4:24.110.76.216 include:spf.exclaimer.net include:_spf.salesforce.com include:aspmx.pardot.com include:spf.protection.outlook.com include:amazonses.com include:spf2.accessacloud.com include:spf1.formassembly.com include:cust-spf.exacttarget.com -all
v=DMARC1; p=none; fo=1; rua=mailto:dmarc@rsa.org.uk,mailto:dmarc@wearepenelope.co.uk,mailto:rua+rsa.org.uk@dmarc.barracudanetworks.com; ruf=mailto:ruf+rsa.org.uk@dmarc.barracudanetworks.com

NS 2

elma.ns.cloudflare.com
james.ns.cloudflare.com

SOA 1

elma.ns.cloudflare.com dns.cloudflare.com

TLS Certificates (3)

Common Name	Issuer	Expires
`rsa.org.uk`	C=AT, O=ZeroSSL GmbH, CN=ZeroSSL ECC DV SSL CA 2	Fri, 23 Oct 2026 23:59:59 +0000
`ZeroSSL ECC DV SSL CA 2`	C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication Root E46	Sun, 23 Sep 2035 23:59:59 +0000
`Sectigo Public Server Authentication Root E46`	C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust ECC Certification Authority	Mon, 18 Jan 2038 23:59:59 +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; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for rsa.org.uk. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_987e53a60a22d298
Output Hash: c200a0e0c6d9ed607b223c49086e184abb7642f7e48cb9732928be162b2dfe9d
Signature: ed25519:8b0d5b150dd3f98f516d249320da516d2b5dcbe99e2c033183a6df1775bcb30e8c448e690dcdea8c9f470dd9385e4709f1fc44d9fcd704e9a17f0151d015c004
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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