mailserver.plexsys.co.uk - dns.ninja

mailserver.plexsys.co.uk

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:a5f9🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::6815:1017🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.16.23Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.165.249🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.16.23, 172.67.165.249
IPv6 hints2606:4700:3030::ac43:a5f9, 2606:4700:3033::6815:1017
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=197, name=cloudflare-ech.com

plexsys.co.uk

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:a5f9🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::6815:1017🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.16.23Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.165.249🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSchelsea.ns.cloudflare.com ⭐
NSdale.ns.cloudflare.com
MXmail2.quickdns.co.uk ⭐
TXTv=spf1 -all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.16.23, 172.67.165.249
IPv6 hints2606:4700:3030::ac43:a5f9, 2606:4700:3033::6815:1017
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=197, name=cloudflare-ech.com
SOAchelsea.ns.cloudflare.comdns@cloudflare.com serial=2403004002

Previously MX for

plexsys.co.uk

Same first word

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DNS History

6 records (4 active, 2 former)

A104.21.16.23172.67.165.2492606:4700:3030::ac43:a5f92606:4700:3033::6815:10172606:4700:3031::6815:10172606:4700:3037::ac43:a5f9
●A104.21.16.232026-04-16 → 2026-06-21 · 2 obs
● 2026-04-16 13:26:56
● 2026-06-21 18:12:36
●A172.67.165.2492026-04-16 → 2026-06-21 · 2 obs
● 2026-04-16 13:26:56
● 2026-06-21 18:12:36
●A2606:4700:3030::ac43:a5f92026-06-21 → 2026-06-21 · 2 obs
○ 2026-06-15 04:32:12
● 2026-06-21 18:12:36
○A2606:4700:3031::6815:10172026-04-16 → 2026-06-15 · 3 obs
● 2026-04-16 13:26:56
● 2026-06-15 04:32:12
○ 2026-06-21 18:12:36
●A2606:4700:3033::6815:10172026-06-21 → 2026-06-21 · 2 obs
○ 2026-06-15 04:32:12
● 2026-06-21 18:12:36
○A2606:4700:3037::ac43:a5f92026-04-16 → 2026-06-15 · 3 obs
● 2026-04-16 13:26:56
● 2026-06-15 04:32:12
○ 2026-06-21 18:12:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
uknsa.nic.uk, nsb.nic.uk, nsc.nic.uk, nsd.nic.uk...-
plexsys.co.ukdale.ns.cloudflare.com, chelsea.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.34.177

NS records: dale.ns.cloudflare.com, chelsea.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for plexsys.co.uk (unsigned zone)

⏱️ Timing

Total: 220ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.16.23, 172.67.165.249
AAAA22606:4700:3030::ac43:a5f9, 2606:4700:3033::6815:1017
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mailserver.plexsys.co.uk resolves to four IP addresses: 104.21.16.23, 172.67.165.249, 2606:4700:3030::ac43:a5f9 and 2606:4700:3033::6815:1017.

Two other host names, along with www.blacksingles.com, gtexpressinc.com and www.pdfsearchhq.com, also share IP numbers with mailserver.plexsys.co.uk.