`mail.proofandreason.com`

DNSSEC	⚠️ Not signed
A	81.91.87.10^{🇨🇿 WEB4U81.91.80.0/21}
		PTR	`mail.web4u.cz`

`proofandreason.com`

	DNSSEC	⚠️ Not signed
	A	193.85.154.158^{🇨🇿 TMOBILE-CZ193.85.0.0/16 T-Mobile Czech Republic a.s.}
	NS	`ns2.web4u.cz` ⭐
	NS	`ns.web4u.cz`
	MX	`mx.web4u.cz` ⭐
	SOA	`ns.web4u.cz`admin@web4u.cz 2011-12-19 #1

Previously MX for

proofandreason.com

Same first word

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DNS History

1 record (1 active, 0 former)

●A81.91.87.102015-07-23 → 2026-03-28 · 2 obs

● 2015-07-23 02:45:58
● 2026-03-28 20:56:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
proofandreason.com	ns.web4u.cz, ns2.web4u.cz	-

✅ Authoritative Response

Server:185.14.224.241

NS records: ns.web4u.cz, ns2.web4u.cz

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for proofandreason.com (unsigned zone)

⏱️ Timing

Total: 735ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.91.87.10`

Analysis

IP Addresses

mail.proofandreason.com points to a single IP address: 81.91.87.10.

Other host names such as mail.web4u.cz, mail.bastyri.cz, mail.nanastroj.cz, mail.heptatechnology.com and mail.mac-apple.cz share IP numbers with mail.proofandreason.com.

mail.proofandreason.com - robtex.com