onlineprogram.cz - dns.ninja

`onlineprogram.cz`

DNSSEC	⚠️ Not signed
A	81.31.33.166^{🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1}
NS	`ns2.basic.sk` ⭐
		A	81.31.42.247^{🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1}
NS	`ns.basic.sk`
		A	81.31.33.162^{🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1}
MX	`mail.onlineprogram.cz` ⭐
		A	81.31.33.164^{🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1}
		A	81.31.33.165^{🇨🇿 MASTER-AS81.31.32.0/20 MASTER-NET-1}
TXT	`v=spf1 mx -all`
SOA	`ns.basic.sk`tb@basic.sk 2022-06-16 #1

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1780872434

Subdomains

mail.onlineprogram.cz

Same first word

onlineprogram.ca

onlineprogram.com

onlineprogram.org

onlineprogram.cz

onlineprogram.sk

Similar names

programonline.de

programonline.it

programonline.ru

DNS History

5 records (4 active, 1 former)

●NSns.basic.sk2015-06-06 → 2026-06-07 · 2 obs

● 2015-06-06 16:43:12
● 2026-06-07 23:08:10

●NSns2.basic.sk2015-06-06 → 2026-06-07 · 2 obs

● 2015-06-06 16:43:12
● 2026-06-07 23:08:10

●MXmail.onlineprogram.cz2015-06-06 → 2026-06-07 · 2 obs

● 2015-06-06 16:43:12
● 2026-06-07 23:08:10

●A81.31.33.1662017-01-13 → 2026-06-07 · 3 obs

○ 2016-05-06 05:10:00
● 2017-01-13 19:25:36
● 2026-06-07 23:08:10

○A86.110.226.612015-06-06 → 2016-05-06 · 4 obs

● 2015-06-06 16:43:12
● 2016-05-06 05:10:00
○ 2017-01-13 19:25:36
○ 2026-06-07 23:08:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	d.ns.nic.cz, b.ns.nic.cz, a.ns.nic.cz, c.ns.nic.cz	-
onlineprogram.cz	ns.basic.sk, ns2.basic.sk	-

✅ Authoritative Response

Server:81.31.42.247

NS records: ns.basic.sk, ns2.basic.sk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for onlineprogram.cz (unsigned zone)

⏱️ Timing

Total: 1269ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.31.33.166`
NS	2	`ns.basic.sk, ns2.basic.sk`
MX	1	`mail.onlineprogram.cz (pri: 1)`
TXT	1	`v=spf1 mx -all`
SOA	1	`ns.basic.sk tb.basic.sk`

Analysis

Hierarchy

onlineprogram.cz is a parent domain of mail.onlineprogram.cz.

IP Addresses

onlineprogram.cz points to a single IP number: 81.31.33.166.

Additional host names — seoportal.cz, nula.sk, crazyhost.sk and two others — share IP numbers with onlineprogram.cz.

Name Servers

DNS delegation for onlineprogram.cz points to two name servers: ns2.basic.sk and ns.basic.sk.

onlineprogram.cz shares its name server setup with other domains, including vystaviste.eu, jednotky.sk, odpovedie.cz and two others.

onlineprogram.cz shares at least some of its name servers with other domains, such as demohry.sk and webgrafika.sk.

ns2.basic.sk and ns.basic.sk each resolve to one IP number: ns2.basic.sk points to 81.31.42.247 and ns.basic.sk points to 81.31.33.162.

Mail Servers

onlineprogram.cz has one mail server: mail.onlineprogram.cz.

mail.onlineprogram.cz points to two IP addresses: 81.31.33.164 and 81.31.33.165.