utl.pt

Observed 2026-07-10T12:00:12.507Z (23h ago). Every field below was attested with an Ed25519 signature at scan time.

INFRASTRUCTURE MAPwhat utl.pt actually stands on - every host below is a signed observation

utl.pt

a.ul.ptb.ul.ptns1.tecnico.ulisboa.ptns2.tecnico.ulisboa.pt

ul.pt + ulisboa.ptanswers its DNS

mx24.ulisboa.ptmx21.ulisboa.ptmx23.ulisboa.ptmx22.ulisboa.pt

ulisboa.ptreceives its email

HTTPS probe

server_error Server error (5xx) 530 Server Error

HTTP status530

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time541 ms

DNS resolutionNOERROR

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

DNS Records

MX 4

150mx24.ulisboa.pt
150mx21.ulisboa.pt
150mx23.ulisboa.pt
150mx22.ulisboa.pt

TXT 5

Antiga UTL
Universidade de Lisboa
HARICA-GWohQgu5VIsjbaqWjeN
v=spf1 a:mx21.ulisboa.pt a:mx22.ulisboa.pt a:mx23.ulisboa.pt a:mx24.ulisboa.pt include:ulisboa.pt a ip4:193.137.196.67 ip6:2001:690:a00:1036::67 -all
v=DNSSEC1; (detected)

NS 4

a.ul.pt
b.ul.pt
ns1.tecnico.ulisboa.pt
ns2.tecnico.ulisboa.pt

SOA 1

a.ul.pt sistemas.reitoria.ulisboa.pt

TLS Certificates (0)

None.

Subdomains (200)

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

Ed25519 Receipt

Receipt ID: 3be454a5-3abe-4bd2-8400-6840cbfb2fb1
Output Hash: c06886c027878e382b05f5444bbc316abd0c6c653b217ce80e11e252f710c2ed
Signature: ed25519:b43221378edf389fa08fccedc4761fc44ba2ccdcac76f785f92df2ab0ababe90ba6f06d6d6b4ba5d424fe140d9cdec566e5916cb0b01d37c9618201c51e36406
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://connor.dns.drm3.network/t/utl.pt/2026-07-10T12:00:12.507Z