knowledgefactory.cz - dns.ninja

`knowledgefactory.cz`

DNSSEC	⚠️ Not signed
A	159.69.131.241^{🇩🇪 Hetzner159.69.0.0/16 HETZNER-DC}
		PTR	`future.vesim.cz`
NS	`ns-2002.awsdns-58.co.uk` ⭐
		A	2600:9000:5307:d200::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-2002.awsdns-58.co.uk`
		A	205.251.199.210^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-2002.awsdns-58.co.uk`
NS	`ns-1141.awsdns-14.org`
		A	2600:9000:5304:7500::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1141.awsdns-14.org`
		A	205.251.196.117^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1141.awsdns-14.org`
NS	`ns-126.awsdns-15.com`
		A	2600:9000:5300:7e00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-126.awsdns-15.com`
		A	205.251.192.126^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-126.awsdns-15.com`
NS	`ns-780.awsdns-33.net`
		A	2600:9000:5303:c00::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-780.awsdns-33.net`
		A	205.251.195.12^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-780.awsdns-33.net`
MX	`knowledgefactory-cz.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::b^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-dbbpr03cu00103.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::d^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db6pr03cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::1^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr07cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::e^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00206.inbound.protection.outlook.com`
		A	52.101.68.21^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00205.inbound.protection.outlook.com`
		A	52.101.68.27^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00503.inbound.protection.outlook.com`
		A	52.101.73.11^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am1pr04cu00103.inbound.protection.outlook.com`
		A	52.101.73.24^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr05cu00300.inbound.protection.outlook.com`
TXT	`MS=ms23892002`
TXT	`atlassian-domain-verification=iWpNVEZczlx4SghusOvlXpgkbWmprHA8RHmdMAjAgEbR+Nw...`
TXT	`google-site-verification=iY1GStKRf-a_rTylQH8TSS0w6iCZAFu2WaD3qVVfst8`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns-2002.awsdns-58.co.uk`awsdns-hostmaster@amazon.com serial=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=1785413839

Subdomains

www.knowledgefactory.cz

Same first word

DNS History

16 records (6 active, 10 former)

●NSns-1141.awsdns-14.org2026-05-01 → 2026-07-30 · 3 obs

○ 2020-01-03 13:06:10
● 2026-05-01 22:24:46
● 2026-07-30 13:12:54

●NSns-126.awsdns-15.com2026-05-01 → 2026-07-30 · 3 obs

○ 2020-01-03 13:06:10
● 2026-05-01 22:24:46
● 2026-07-30 13:12:54

○NSns-1360.awsdns-42.org2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

○NSns-1593.awsdns-07.co.uk2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

●NSns-2002.awsdns-58.co.uk2026-05-01 → 2026-07-30 · 3 obs

○ 2020-01-03 13:06:10
● 2026-05-01 22:24:46
● 2026-07-30 13:12:54

○NSns-439.awsdns-54.com2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

○NSns-643.awsdns-16.net2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

●NSns-780.awsdns-33.net2026-05-01 → 2026-07-30 · 3 obs

○ 2020-01-03 13:06:10
● 2026-05-01 22:24:46
● 2026-07-30 13:12:54

○MXalt1.aspmx.l.google.com2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

○MXalt2.aspmx.l.google.com2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

○MXalt3.aspmx.l.google.com2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

○MXalt4.aspmx.l.google.com2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

○MXaspmx.l.google.com2020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

●MXknowledgefactory-cz.mail.protection.outlook.com2026-05-01 → 2026-07-30 · 3 obs

○ 2020-01-03 13:06:10
● 2026-05-01 22:24:46
● 2026-07-30 13:12:54

●A159.69.131.2412026-05-01 → 2026-07-30 · 3 obs

○ 2020-01-03 13:06:10
● 2026-05-01 22:24:46
● 2026-07-30 13:12:54

○A3.120.139.312020-01-03 → 2020-01-03 · 3 obs

● 2020-01-03 13:06:10
○ 2026-05-01 22:24:46
○ 2026-07-30 13:12:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	-
knowledgefactory.cz	ns-126.awsdns-15.com, ns-780.awsdns-33.net, ns-1141.awsdns-14.org, ns-2002.awsdns-58.co.uk	-

✅ Authoritative Response

Server:205.251.199.210

NS records: ns-126.awsdns-15.com, ns-780.awsdns-33.net, ns-1141.awsdns-14.org, ns-2002.awsdns-58.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledgefactory.cz (unsigned zone)

⏱️ Timing

Total: 1570ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`159.69.131.241`
NS	4	`ns-1141.awsdns-14.org, ns-126.awsdns-15.com...`
MX	1	`knowledgefactory-cz.mail.protection.outl`
TXT	4	`MS=ms23892002, atlassian-domain-verification=iWpNVEZczl...`
SOA	1	`ns-2002.awsdns-58.co.uk awsdns-hostmaste`

Analysis

Hierarchy

www.knowledgefactory.cz is a subdomain of knowledgefactory.cz.

IP Addresses

knowledgefactory.cz has exactly one IP address — 159.69.131.241.

mail.sskborek.eu, www.steppinvest.cz, karatedo.cz plus two other host names have IP numbers in common with knowledgefactory.cz.

Name Servers

Four name servers handle the delegation for knowledgefactory.cz: ns-126.awsdns-15.com, ns-780.awsdns-33.net, ns-1141.awsdns-14.org and ns-2002.awsdns-58.co.uk.

The name servers of knowledgefactory.cz overlap at least partially with those of other domains — among them tech.gotrendier.com, botmeta.com, beautyjournal.id and two more.

Each of the four hosts ns-126.awsdns-15.com, ns-780.awsdns-33.net, ns-1141.awsdns-14.org and ns-2002.awsdns-58.co.uk has two IP addresses. ns-126.awsdns-15.com points to 205.251.192.126 and 2600:9000:5300:7e00::1. ns-780.awsdns-33.net points to 205.251.195.12 and 2600:9000:5303:c00::1. ns-1141.awsdns-14.org points to 205.251.196.117 and 2600:9000:5304:7500::1. ns-2002.awsdns-58.co.uk points to 205.251.199.210 and 2600:9000:5307:d200::1.

Mail Servers

knowledgefactory.cz uses one mail server — knowledgefactory-cz.mail.protection.outlook.com.

knowledgefactory-cz.mail.protection.outlook.com has 8 IP addresses: 52.101.68.21, 52.101.68.27, 52.101.73.11 plus 5 more.