`mail.usbkluc.sk`

CNAME	`mail.gransy.com`
DNSSEC	⚠️ Not signed
A	2001:1528:137::f1^{🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network}
		PTR	`mail.gransy.com`
A	82.208.29.194^{🇨🇿 CASABLANCA-AS82.208.28.0/23 Casablanca INT}
A	185.28.193.5^{🇨🇿 GRANSY185.28.193.0/24 Network of Gransy s.r.o.}
A	185.28.193.11^{🇨🇿 GRANSY185.28.193.0/24 Network of Gransy s.r.o.}
A	185.28.193.23^{🇨🇿 GRANSY185.28.193.0/24 Network of Gransy s.r.o.}
A	185.28.193.36^{🇨🇿 GRANSY185.28.193.0/24 Network of Gransy s.r.o.}
A	185.28.193.37^{🇨🇿 GRANSY185.28.193.0/24 Network of Gransy s.r.o.}
TXT	`v=spf1 a mx ip4:77.78.104.0/24 ip4:185.28.192.0/22 ip4:185.38.108.0/22 ip4:18...`

`usbkluc.sk`

	DNSSEC	🔒 Signed (DS record present)
	A	77.78.104.3^{🇨🇿 CASABLANCA-AS77.78.96.0/20 Casablanca INT}
	NS	`ns2.gransy.com` ⭐
	NS	`ns.gransy.com`
	NS	`ns3.gransy.com`
	NS	`ns4.gransy.com`
	NS	`ns5.gransy.com`
	MX	`mail.usbkluc.sk` ⭐
	TXT	`v=spf1 a mx include:gransy.com`
	SOA	`ns.gransy.com`root@gransy.com serial=2753309136

MX for

usbkluc.sk

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DNS History

1 record (1 active, 0 former)

●CNAMEmail.gransy.com2026-03-26 → 2026-03-27 · 2 obs

● 2026-03-26 20:56:50
● 2026-03-27 03:44:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
sk	f.tld.sk, h.tld.sk, e.tld.sk, g.tld.sk	-
usbkluc.sk	ns5.gransy.com, ns2.gransy.com, ns.gransy.com, ns4.gransy.com...	-

✅ Authoritative Response

Server:45.76.90.43

NS records: ns5.gransy.com, ns2.gransy.com, ns.gransy.com, ns4.gransy.com, ns3.gransy.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 843ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`mail.gransy.com`

Analysis

Mail Server Role

mail.usbkluc.sk handles mail for usbkluc.sk.

IP Addresses

Seven IP numbers are pointed to by mail.usbkluc.sk: 2001:1528:137::f1, 82.208.29.194, 185.28.193.5, 185.28.193.11, 185.28.193.23, 185.28.193.36 and 185.28.193.37.

Other host names such as mail.cvodafone.cz, mail.snehurka.sk, mail.fanstech.cz, mail.ineko.cz and mail.vyklad.cz share IPs with mail.usbkluc.sk.

mail.usbkluc.sk - robtex.com

mail.usbkluc.sk

usbkluc.sk