`mypolishcourse.com`

DNSSEC	⚠️ Not signed
A	212.91.12.120^{🇵🇱 ATMAN-ISP-AS212.91.12.0/24 Atman (PL)}
		PTR	`vs6.celerise.com`
NS	`ns1.hosti24.pl` ⭐
		A	217.17.41.200^{🇵🇱 ATMAN-ISP-AS217.17.32.0/20 ATMAN (PL)}
NS	`ns2.hosti24.pl`
		A	217.17.41.201^{🇵🇱 ATMAN-ISP-AS217.17.32.0/20 ATMAN (PL)}
MX	`mx2.hosti24.pl` ⭐
		A	217.17.41.198^{🇵🇱 ATMAN-ISP-AS217.17.32.0/20 ATMAN (PL)}
			PTR	`mx2.hosti24.pl`
MX	`mx.hosti24.pl`⁽²⁰⁾
		A	217.17.41.196^{🇵🇱 ATMAN-ISP-AS217.17.32.0/20 ATMAN (PL)}
			PTR	`mx.hosti24.pl`
TXT	`v=spf1 mx ip4:217.17.41.196 ip4:217.17.41.198 ~all`
SOA	`ns1.hosti24.pl`dns@hosti24.pl 2026-03-19 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1774414817

Subdomains

mail.mypolishcourse.com

Same first word

mypolishcourse.com

DNS History

12 records (5 active, 7 former)

○NSdns1.linuxpl.com2026-03-17 → 2026-03-25 · 2 obs

○ 2026-03-17 14:22:28
○ 2026-03-25 05:29:32

○NSdns10.linuxpl.com2018-01-30 → 2018-01-30 · 3 obs

● 2018-01-30 10:47:56
○ 2026-03-17 14:22:28
○ 2026-03-25 05:29:32

○NSdns2.linuxpl.com2026-03-17 → 2026-03-25 · 2 obs

○ 2026-03-17 14:22:28
○ 2026-03-25 05:29:32

●NSns1.hosti24.pl2026-03-17 → 2026-03-25 · 3 obs

○ 2018-01-30 10:47:56
● 2026-03-17 14:22:28
● 2026-03-25 05:29:32

○NSns10.linuxpl.com2018-01-30 → 2018-01-30 · 3 obs

● 2018-01-30 10:47:56
○ 2026-03-17 14:22:28
○ 2026-03-25 05:29:32

●NSns2.hosti24.pl2026-03-17 → 2026-03-25 · 3 obs

○ 2018-01-30 10:47:56
● 2026-03-17 14:22:28
● 2026-03-25 05:29:32

○MXmail.mypolishcourse.com2018-01-30 → 2018-01-30 · 3 obs

● 2018-01-30 10:47:56
○ 2026-03-17 14:22:28
○ 2026-03-25 05:29:32

●MXmx.hosti24.pl2026-03-17 → 2026-03-25 · 3 obs

○ 2018-01-30 10:47:56
● 2026-03-17 14:22:28
● 2026-03-25 05:29:32

●MXmx2.hosti24.pl2026-03-17 → 2026-03-25 · 3 obs

○ 2018-01-30 10:47:56
● 2026-03-17 14:22:28
● 2026-03-25 05:29:32

○A188.40.110.122018-01-30 → 2018-01-30 · 3 obs

● 2018-01-30 10:47:56
○ 2026-03-17 14:22:28
○ 2026-03-25 05:29:32

○A195.78.67.132026-03-17 → 2026-03-25 · 2 obs

○ 2026-03-17 14:22:28
○ 2026-03-25 05:29:32

●A212.91.12.1202026-03-17 → 2026-03-25 · 3 obs

○ 2018-01-30 10:47:56
● 2026-03-17 14:22:28
● 2026-03-25 05:29:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, c.gtld-servers.net, l.gtld-servers.net, a.gtld-servers.net...	-
mypolishcourse.com	ns1.hosti24.pl, ns2.hosti24.pl	-

✅ Authoritative Response

Server:217.17.41.200

NS records: ns1.hosti24.pl, ns2.hosti24.pl

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mypolishcourse.com (unsigned zone)

⏱️ Timing

Total: 725ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`212.91.12.120`
NS	2	`ns2.hosti24.pl, ns1.hosti24.pl`
MX	2	`mx.hosti24.pl (pri: 10), mx2.hosti24.pl (pri: 20)`
TXT	1	`v=spf1 mx ip4:217.17.41.196 ip4:217.17.4`
SOA	1	`ns1.hosti24.pl dns.hosti24.pl`

Analysis

Hierarchy

mypolishcourse.com is parent of mail.mypolishcourse.com.

IP Addresses

mypolishcourse.com points to a single IP: 212.91.12.120.

Other host names, for instance enter24.net, mail.myfilmstar.com, mail.nrw.qualocrm.com, 229.144.196.redhosting.pl and www.damastattoo.pl share IP numbers with mypolishcourse.com.

Name Servers

mypolishcourse.com's delegation is to two name servers ns1.hosti24.pl and ns2.hosti24.pl.

mypolishcourse.com shares the same name server configuration as other domains, such as qualocrm.com, sqad.pl, maszt.pl, cafealibi.pl and means.pl.

mypolishcourse.com at least partially shares its name servers with other domains, for instance komornikmyszkow.pl, skarlet.pl, voltis.pl, estudio106.com and deel.ddl.pl.

Host names with a single IP:

ns1.hosti24.pl resolves to 217.17.41.200.

ns2.hosti24.pl resolves to 217.17.41.201.

Mail Servers

Two mail servers mx2.hosti24.pl and mx.hosti24.pl handle mypolishcourse.com.

mypolishcourse.com uses the same mail server setup as other domains such as poranek.com.pl, lubiejewski.com, mboplus.com, komornikmyszkow.pl and skarlet.pl.

mypolishcourse.com shares some mail servers with other domains, including gecko.com.pl, hosti24.pl, gdziekupicmapei.pl, celerise.com and promerc.pl.

Host names with a single IP:

mx2.hosti24.pl resolves to 217.17.41.198.

mx.hosti24.pl resolves to 217.17.41.196.

mypolishcourse.com - robtex.com