`dual-system.pl`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::ac43:81ce^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:2ec^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.2.236^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.129.206^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`donald.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b9e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donald.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c19e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`donald.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:219e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`donald.ns.cloudflare.com`
		A	108.162.193.158^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donald.ns.cloudflare.com`
		A	172.64.33.158^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donald.ns.cloudflare.com`
		A	173.245.59.158^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`donald.ns.cloudflare.com`
NS	`jamie.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aa8^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0a8^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jamie.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20a8^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jamie.ns.cloudflare.com`
		A	108.162.192.168^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
		A	172.64.32.168^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
		A	173.245.58.168^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jamie.ns.cloudflare.com`
MX	`mail.dual-system.pl` ⭐
		A	146.59.55.15^{🇫🇷 OVH146.59.0.0/17}
			PTR	`ns3205047.ip-146-59-55.eu`
TXT	`google-site-verification=PVyDDxAVnZCtq2S8UHUT1UQUngeRMLSDBJSax052QD8`
TXT	`google-site-verification=j0NmM0xKyWpLt6SaApX4xzOAvO8EWUYrp0xyMPmlfjw`
TXT	`v=spf1 a mx ip4:146.59.55.15 -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.2.236, 172.67.129.206
		IPv6 hints	2606:4700:3034::ac43:81ce, 2606:4700:3037::6815:2ec
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=28, name=cloudflare-ech.com
SOA	`donald.ns.cloudflare.com`dns@cloudflare.com serial=2400605796

`pl`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a-dns.pl` ⭐
	NS	`b-dns.pl`
	NS	`d-dns.pl`
	NS	`f-dns.pl`
	NS	`h-dns.pl`
	NS	`j-dns.pl`
	TXT	`ccTLD of Poland`
	SOA	`a-dns.pl`dnsmaster@nask.pl serial=1776061904

Subdomains

www.dual-system.pl

mail.dual-system.pl

Same first word

dual-system.pl

DNS History

12 records (7 active, 5 former)

●NSdonald.ns.cloudflare.com2026-03-14 → 2026-04-13 · 3 obs

○ 2017-07-08 11:42:22
● 2026-03-14 03:53:12
● 2026-04-13 12:47:44

●NSjamie.ns.cloudflare.com2026-03-14 → 2026-04-13 · 3 obs

○ 2017-07-08 11:42:22
● 2026-03-14 03:53:12
● 2026-04-13 12:47:44

○NSns1.cal.pl2015-06-01 → 2017-07-08 · 4 obs

● 2015-06-01 04:22:40
● 2017-07-08 11:42:22
○ 2026-03-14 03:53:12
○ 2026-04-13 12:47:44

○NSns2.cal.pl2015-06-01 → 2017-07-08 · 4 obs

● 2015-06-01 04:22:40
● 2017-07-08 11:42:22
○ 2026-03-14 03:53:12
○ 2026-04-13 12:47:44

●MXmail.dual-system.pl2015-06-01 → 2026-04-13 · 2 obs

● 2015-06-01 04:22:40
● 2026-04-13 12:47:44

●A104.21.2.2362026-03-14 → 2026-04-13 · 3 obs

○ 2017-07-08 11:42:22
● 2026-03-14 03:53:12
● 2026-04-13 12:47:44

●A172.67.129.2062026-03-14 → 2026-04-13 · 3 obs

○ 2017-07-08 11:42:22
● 2026-03-14 03:53:12
● 2026-04-13 12:47:44

●A2606:4700:3034::ac43:81ce2026-03-14 → 2026-04-13 · 3 obs

○ 2017-07-08 11:42:22
● 2026-03-14 03:53:12
● 2026-04-13 12:47:44

●A2606:4700:3037::6815:2ec2026-03-14 → 2026-04-13 · 3 obs

○ 2017-07-08 11:42:22
● 2026-03-14 03:53:12
● 2026-04-13 12:47:44

○A46.29.17.1702015-06-01 → 2015-06-01 · 3 obs

● 2015-06-01 04:22:40
○ 2015-10-26 00:42:32
○ 2026-04-13 12:47:44

○A5.135.137.1202017-07-08 → 2017-07-08 · 4 obs

○ 2016-11-29 03:33:32
● 2017-07-08 11:42:22
○ 2026-03-14 03:53:12
○ 2026-04-13 12:47:44

○A85.194.240.1872015-10-26 → 2016-11-29 · 5 obs

○ 2015-06-01 04:22:40
● 2015-10-26 00:42:32
● 2016-11-29 03:33:32
○ 2017-07-08 11:42:22
○ 2026-04-13 12:47:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
pl	a-dns.pl, b-dns.pl, d-dns.pl, f-dns.pl...	-
dual-system.pl	jamie.ns.cloudflare.com, donald.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.158

NS records: jamie.ns.cloudflare.com, donald.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for dual-system.pl (unsigned zone)

⏱️ Timing

Total: 986ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.129.206, 104.21.2.236`
AAAA	2	`2606:4700:3037::6815:2ec, 2606:4700:3034::ac43:81ce`
NS	2	`donald.ns.cloudflare.com, jamie.ns.cloudflare.com`
MX	1	`mail.dual-system.pl (pri: 10)`
TXT	3	`google-site-verification=PVyDDxAVnZCtq2S, google-site-verification=j0NmM0xKyWpLt6S...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`donald.ns.cloudflare.com dns.cloudflare.`

Analysis

Hierarchy

dual-system.pl is the parent of www.dual-system.pl and mail.dual-system.pl.

IP Addresses

dual-system.pl resolves to four IPs: 2606:4700:3034::ac43:81ce, 2606:4700:3037::6815:2ec, 104.21.2.236 and 172.67.129.206.

Other host names, for instance scepat99.net, thetwine.app, www.509drones.com, www.niwho.com and www.nohu28.world share IP numbers with dual-system.pl.

Name Servers

dual-system.pl has two name servers: donald.ns.cloudflare.com and jamie.ns.cloudflare.com.

dual-system.pl shares the same name server setup as other domains, for example headwaters-development.com, matro.net.pl, kennyspondresidence.com, kmkinc.ca and nowexwn.com.pl.

dual-system.pl shares some name servers with other domains, for example sunshinemanagement.net, pattons.com.au, rivertowndesigns.com, isaza.ca and pl-32526oferta.shop.

These name servers are commonly used together with magnolia.ns.cloudflare.com and cris.ns.cloudflare.com.

Host names with six IP numbers: donald.ns.cloudflare.com points to: 2606:4700:58::adf5:3b9e, 2803:f800:50::6ca2:c19e, 2a06:98c1:50::ac40:219e, 108.162.193.158, 172.64.33.158 and 173.245.59.158; jamie.ns.cloudflare.com points to: 2606:4700:50::adf5:3aa8, 2803:f800:50::6ca2:c0a8, 2a06:98c1:50::ac40:20a8, 108.162.192.168, 172.64.32.168 and 173.245.58.168.

Mail Servers

dual-system.pl is handled by a single mail server, mail.dual-system.pl.

Host name mail.dual-system.pl points to IP 146.59.55.15.

dual-system.pl - robtex.com

dual-system.pl

pl

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`dual-system.pl`

`pl`