aa.net.uk
Observed Jul 24, 2026, 01:04 UTC (7h 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.
Up right now
Runs onAndrews & Arnold
Secured byLet's Encrypt
Registered withAndrews & Arnold Ltd
IPv6 · 2 subdomains · tranco_100k
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat aa.net.uk actually stands on - every host below is a signed observation
aa.net.uk
A / AAAA
194.4.173.5194.4.172.52001:8b0:0:62::142001:8b0:0:62::13
Andrews & Arnoldserves the site
NS
secondary-dns.co.ukprimary-dns.co.uk
secondary-dns.co.uk + primary-dns.co.ukanswers its DNS
MX
tertiary-mx.co.ukincoming-mail.aa.net.uk
tertiary-mx.co.uk + net.ukreceives its email
TLS
www.firebrick.co.uk
Let's Encryptissued its certificate
DNS Records
A 2
194.4.173.5194.4.172.5
AAAA 2
2001:8b0:0:62::142001:8b0:0:62::13
MX 2
40tertiary-mx.co.uk20incoming-mail.aa.net.uk
TXT 2
v=spf1 a mx ip4:90.155.53.0/24 ip4:90.155.23.0/24 ip4:90.155.62.0/24 ip4:81.187.30.48/29 ip6:2001:8b0::/47 include:_spf_include.aa.net.uk ?allv=DMARC1; p=none; sp=none; rua=mailto:andrew@aa.net.uk; ruf=mailto:andrew@aa.net.uk; fo=1
NS 2
secondary-dns.co.ukprimary-dns.co.uk
SOA 1
primary-dns.co.uk hostmaster.aa.net.uk
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
www.firebrick.co.uk |
C=US, O=Let's Encrypt, CN=YR1 | Sat, 26 Sep 2026 23:06:43 +0000 |
YR1 |
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 receiptEd25519 Receipt
- Receipt ID
rcpt_686f1a865dc2fd8f- Output Hash
21992761bb208075422d1262b941595032fbe7376d369f2a062c6f465874a775- Signature
ed25519:2cfe951d349c2fde119683c5be822caa2fe556efd1d1d2c48f003a498c03bbaf539f65e3d770eda1564e848bde7deb18efd3140e82af12e7ae47e68ef1ab5c0c- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast