coresystems.pl - dns.ninja

`coresystems.pl`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:9dda^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:e34^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.14.52^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.157.218^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`byron.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c43^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c343^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`byron.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2343^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`byron.ns.cloudflare.com`
		A	108.162.195.67^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	162.159.44.67^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
		A	172.64.35.67^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`byron.ns.cloudflare.com`
NS	`laylah.ns.cloudflare.com`
		A	2606:4700:50::a29f:26e6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`laylah.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2e6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`laylah.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22e6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`laylah.ns.cloudflare.com`
		A	108.162.194.230^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`laylah.ns.cloudflare.com`
		A	162.159.38.230^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`laylah.ns.cloudflare.com`
		A	172.64.34.230^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`laylah.ns.cloudflare.com`
MX	`_dc-mx.7d8f54e37711.coresystems.pl` ⭐
		A	194.181.228.150^{🇵🇱 NASK-COMMERCIAL194.181.0.0/16 NASK (PL) Provider Local Registry}
TXT	`v=spf1 ip4:194.181.228.150 include:_spf.webd.pl -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.14.52, 172.67.157.218
		IPv6 hints	2606:4700:3033::ac43:9dda, 2606:4700:3035::6815:e34
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=111, name=cloudflare-ech.com
SOA	`byron.ns.cloudflare.com`dns@cloudflare.com serial=2408904508

`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=1786170916

Previously MX for

coresystems.pl

Same first word

Similar names

DNS History

23 records (7 active, 16 former)

●NSbyron.ns.cloudflare.com2026-02-22 → 2026-08-09 · 3 obs

○ 2017-11-28 23:39:28
● 2026-02-22 02:54:04
● 2026-08-09 06:57:30

●NSlaylah.ns.cloudflare.com2026-02-22 → 2026-08-09 · 3 obs

○ 2017-11-28 23:39:28
● 2026-02-22 02:54:04
● 2026-08-09 06:57:30

○NSns5.webd.pl2017-11-28 → 2017-11-28 · 4 obs

○ 2016-12-25 18:29:54
● 2017-11-28 23:39:28
○ 2026-02-22 02:54:04
○ 2026-08-09 06:57:30

○NSns69.1and1.pl2015-07-02 → 2016-12-25 · 4 obs

● 2015-07-02 15:28:02
● 2016-12-25 18:29:54
○ 2017-11-28 23:39:28
○ 2026-08-09 06:57:30

○NSns7.webd.pl2017-11-28 → 2017-11-28 · 4 obs

○ 2016-12-25 18:29:54
● 2017-11-28 23:39:28
○ 2026-02-22 02:54:04
○ 2026-08-09 06:57:30

○NSns70.1and1.pl2015-07-02 → 2016-12-25 · 4 obs

● 2015-07-02 15:28:02
● 2016-12-25 18:29:54
○ 2017-11-28 23:39:28
○ 2026-08-09 06:57:30

●MX_dc-mx.7d8f54e37711.coresystems.pl2026-02-22 → 2026-08-09 · 3 obs

○ 2017-11-28 23:39:28
● 2026-02-22 02:54:04
● 2026-08-09 06:57:30

○MXcoresystems.pl2017-11-28 → 2017-11-28 · 4 obs

○ 2016-12-25 18:29:54
● 2017-11-28 23:39:28
○ 2026-02-22 02:54:04
○ 2026-08-09 06:57:30

○MXmx00.1and1.pl2015-07-02 → 2016-12-25 · 4 obs

● 2015-07-02 15:28:02
● 2016-12-25 18:29:54
○ 2017-11-28 23:39:28
○ 2026-08-09 06:57:30

○MXmx01.1and1.pl2015-07-02 → 2016-12-25 · 4 obs

● 2015-07-02 15:28:02
● 2016-12-25 18:29:54
○ 2017-11-28 23:39:28
○ 2026-08-09 06:57:30

●A104.21.14.522026-02-22 → 2026-08-09 · 3 obs

○ 2017-11-28 23:39:28
● 2026-02-22 02:54:04
● 2026-08-09 06:57:30

○A172.64.80.12026-02-22 → 2026-08-09 · 2 obs

○ 2026-02-22 02:54:04
○ 2026-08-09 06:57:30

●A172.67.157.2182026-02-22 → 2026-08-09 · 3 obs

○ 2017-11-28 23:39:28
● 2026-02-22 02:54:04
● 2026-08-09 06:57:30

○A194.181.122.1992017-11-28 → 2017-11-28 · 4 obs

○ 2016-12-25 18:29:54
● 2017-11-28 23:39:28
○ 2026-02-22 02:54:04
○ 2026-08-09 06:57:30

○A2001:8d8:1000:b1f2:326c:96cc:f4e7:b2015-07-02 → 2016-02-05 · 4 obs

● 2015-07-02 15:28:02
● 2016-02-05 21:29:58
○ 2016-05-03 01:00:20
○ 2026-08-09 06:57:30

○A2001:8d8:1000:b1f2:ed8f:d78f:7b22:782c2016-05-03 → 2016-12-25 · 5 obs

○ 2016-02-05 21:29:58
● 2016-05-03 01:00:20
● 2016-12-25 18:29:54
○ 2017-11-28 23:39:28
○ 2026-08-09 06:57:30

○A212.227.247.172016-05-03 → 2016-12-25 · 5 obs

○ 2016-02-05 21:29:58
● 2016-05-03 01:00:20
● 2016-12-25 18:29:54
○ 2017-11-28 23:39:28
○ 2026-08-09 06:57:30

○A217.160.230.1852015-07-02 → 2016-02-05 · 4 obs

● 2015-07-02 15:28:02
● 2016-02-05 21:29:58
○ 2016-05-03 01:00:20
○ 2026-08-09 06:57:30

○A2606:4700:130:436c:6f75:6466:6c61:72652026-02-22 → 2026-08-09 · 2 obs

○ 2026-02-22 02:54:04
○ 2026-08-09 06:57:30

○A2606:4700:3031::ac43:9dda2026-02-22 → 2026-06-18 · 5 obs

○ 2017-11-28 23:39:28
● 2026-02-22 02:54:04
● 2026-06-18 06:28:12
○ 2026-06-28 06:24:20
○ 2026-08-09 06:57:30

●A2606:4700:3033::ac43:9dda2026-06-28 → 2026-08-09 · 3 obs

○ 2026-06-18 06:28:12
● 2026-06-28 06:24:20
● 2026-08-09 06:57:30

●A2606:4700:3035::6815:e342026-06-28 → 2026-08-09 · 3 obs

○ 2026-06-18 06:28:12
● 2026-06-28 06:24:20
● 2026-08-09 06:57:30

○A2606:4700:3036::6815:e342026-02-22 → 2026-06-18 · 5 obs

○ 2017-11-28 23:39:28
● 2026-02-22 02:54:04
● 2026-06-18 06:28:12
○ 2026-06-28 06:24:20
○ 2026-08-09 06:57:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
pl	d-dns.pl, a-dns.pl, h-dns.pl, j-dns.pl...	-
coresystems.pl	byron.ns.cloudflare.com, laylah.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.38.230

NS records: byron.ns.cloudflare.com, laylah.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coresystems.pl (unsigned zone)

⏱️ Timing

Total: 672ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.157.218, 104.21.14.52`
AAAA	2	`2606:4700:3033::ac43:9dda, 2606:4700:3035::6815:e34`
NS	2	`byron.ns.cloudflare.com, laylah.ns.cloudflare.com`
MX	1	`_dc-mx.7d8f54e37711.coresystems.pl (pri:`
TXT	1	`v=spf1 ip4:194.181.228.150 include:_spf.`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`byron.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

coresystems.pl points to the four IP addresses 104.21.14.52, 172.67.157.218, 2606:4700:3033::ac43:9dda and 2606:4700:3035::6815:e34.

three-rooker.com, mx.vvebeheren.nl, nobox-eth.com and two other host names share IP numbers with coresystems.pl.

Name Servers

DNS delegation for coresystems.pl points to two name servers: byron.ns.cloudflare.com and laylah.ns.cloudflare.com.

coresystems.pl uses the same name servers as several other domains — among them cigarjournal.com, backspace.jp, (0x706f726e)zl.com and two more.

There is at least partial name server overlap between coresystems.pl and other domains — droidied.com, 05670.com, canadianarcticproducers.com and two more among them.

The name servers amy.ns.cloudflare.com, eric.ns.cloudflare.com and harvey.ns.cloudflare.com are often found in combination with these name servers.

Hostnames that resolve to 6 IP addresses:

byron.ns.cloudflare.com has IP addresses 108.162.195.67, 162.159.44.67 and 172.64.35.67, plus 3 other.

laylah.ns.cloudflare.com has IP addresses 108.162.194.230, 162.159.38.230 and 172.64.34.230, plus 3 other.

Mail Servers

Mail for coresystems.pl is handled by a single mail server, _dc-mx.7d8f54e37711.coresystems.pl.

_dc-mx.7d8f54e37711.coresystems.pl has exactly one IP number: 194.181.228.150.