`knowledgesystems.org`

DNSSEC	⚠️ Not signed
A	162.43.121.14^{🇯🇵 XSERVER-AS162.43.0.0/17 XSERVER Inc.}
		PTR	`sv14213.xserver.jp`
NS	`ns1.xserver.jp` ⭐
		A	202.226.36.164^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
		A	202.226.36.170^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
		A	202.226.36.246^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns1.xserver.jp`
NS	`ns2.xserver.jp`
		A	35.72.43.26^{🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix}
			PTR	`ns2.xserver.jp`
NS	`ns3.xserver.jp`
		A	202.226.36.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns3.xserver.jp`
NS	`ns4.xserver.jp`
		A	183.90.224.226^{🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.}
		A	183.90.224.230^{🇯🇵 XSERVER-AS183.90.224.0/20 XSERVER Inc.}
		A	202.226.39.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns4.xserver.jp`
NS	`ns5.xserver.jp`
		A	157.112.182.218^{🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.}
		A	157.112.182.220^{🇯🇵 XSERVER-AS157.112.176.0/21 XSERVER Inc.}
		A	202.226.37.247^{🇯🇵 XSERVER-AS202.226.36.0/22 XSERVER Inc.}
			PTR	`ns5.xserver.jp`
MX	`knowledgesystems.org` ⭐
		A	162.43.121.14^{🇯🇵 XSERVER-AS162.43.0.0/17 XSERVER Inc.}
			PTR	`sv14213.xserver.jp`
TXT	`v=spf1 +a:sv14213.xserver.jp +a:knowledgesystems.org +mx include:spf.sender.x...`
SOA	`ns1.xserver.jp`root@xserver.jp serial=0

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1774832197

WOT: SAFE (62/100)

MX for

knowledgesystems.org

Subdomains

mx.knowledgesystems.org

Same first word

knowledgesystems.info

knowledgesystems.com.au

knowledgesystems.nl

knowledgesystems.org

DNS History

16 records (7 active, 9 former)

○NSns1.sedoparking.com2020-01-18 → 2020-01-18 · 4 obs

○ 2016-08-09 17:49:22
● 2020-01-18 10:22:52
○ 2026-02-15 15:28:10
○ 2026-03-30 01:13:56

●NSns1.xserver.jp2026-02-15 → 2026-03-30 · 3 obs

○ 2020-01-18 10:22:52
● 2026-02-15 15:28:10
● 2026-03-30 01:13:56

○NSns1.yourhostingaccount.com2015-08-17 → 2016-08-09 · 4 obs

● 2015-08-17 08:05:00
● 2016-08-09 17:49:22
○ 2020-01-18 10:22:52
○ 2026-03-30 01:13:56

○NSns2.sedoparking.com2020-01-18 → 2020-01-18 · 4 obs

○ 2016-08-09 17:49:22
● 2020-01-18 10:22:52
○ 2026-02-15 15:28:10
○ 2026-03-30 01:13:56

●NSns2.xserver.jp2026-02-15 → 2026-03-30 · 3 obs

○ 2020-01-18 10:22:52
● 2026-02-15 15:28:10
● 2026-03-30 01:13:56

○NSns2.yourhostingaccount.com2015-08-17 → 2016-08-09 · 4 obs

● 2015-08-17 08:05:00
● 2016-08-09 17:49:22
○ 2020-01-18 10:22:52
○ 2026-03-30 01:13:56

●NSns3.xserver.jp2026-02-15 → 2026-03-30 · 3 obs

○ 2020-01-18 10:22:52
● 2026-02-15 15:28:10
● 2026-03-30 01:13:56

●NSns4.xserver.jp2026-02-15 → 2026-03-30 · 3 obs

○ 2020-01-18 10:22:52
● 2026-02-15 15:28:10
● 2026-03-30 01:13:56

●NSns5.xserver.jp2026-02-15 → 2026-03-30 · 3 obs

○ 2020-01-18 10:22:52
● 2026-02-15 15:28:10
● 2026-03-30 01:13:56

●MXknowledgesystems.org2026-02-15 → 2026-03-30 · 3 obs

○ 2020-01-18 10:22:52
● 2026-02-15 15:28:10
● 2026-03-30 01:13:56

○MXmail.pickelhost.com2020-01-18 → 2020-01-18 · 4 obs

○ 2016-08-09 17:49:22
● 2020-01-18 10:22:52
○ 2026-02-15 15:28:10
○ 2026-03-30 01:13:56

○MXmx.knowledgesystems.org2015-08-17 → 2016-08-09 · 4 obs

● 2015-08-17 08:05:00
● 2016-08-09 17:49:22
○ 2020-01-18 10:22:52
○ 2026-03-30 01:13:56

●A162.43.121.142026-02-15 → 2026-03-30 · 3 obs

○ 2020-01-18 10:22:52
● 2026-02-15 15:28:10
● 2026-03-30 01:13:56

○A66.96.149.12016-03-17 → 2016-08-09 · 5 obs

○ 2015-12-02 22:10:16
● 2016-03-17 07:09:48
● 2016-08-09 17:49:22
○ 2020-01-18 10:22:52
○ 2026-03-30 01:13:56

○A66.96.161.1612015-08-17 → 2015-12-02 · 4 obs

● 2015-08-17 08:05:00
● 2015-12-02 22:10:16
○ 2016-03-17 07:09:48
○ 2026-03-30 01:13:56

○A91.195.240.1262020-01-18 → 2020-01-18 · 4 obs

○ 2016-08-09 17:49:22
● 2020-01-18 10:22:52
○ 2026-02-15 15:28:10
○ 2026-03-30 01:13:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
knowledgesystems.org	ns1.xserver.jp, ns5.xserver.jp, ns4.xserver.jp, ns3.xserver.jp...	-

✅ Authoritative Response

Server:202.226.36.164

NS records: ns1.xserver.jp, ns5.xserver.jp, ns4.xserver.jp, ns3.xserver.jp, ns2.xserver.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledgesystems.org (unsigned zone)

⏱️ Timing

Total: 1296ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`162.43.121.14`
NS	5	`ns3.xserver.jp, ns2.xserver.jp...`
MX	1	`knowledgesystems.org (pri: 0)`
TXT	1	`v=spf1 +a:sv14213.xserver.jp +a:knowledg`
SOA	1	`ns1.xserver.jp root.xserver.jp`

Analysis

Hierarchy

knowledgesystems.org is the parent of mx.knowledgesystems.org.

Mail Server Role

For knowledgesystems.org, the mail server is knowledgesystems.org.

IP Addresses

knowledgesystems.org points to a single IP number: 162.43.121.14.

other host names for instance rienmakaefer.com, mx.sandyrodriguez.org, www.industryalley.com, www.kimono-amanoya.co.jp and applied-theatre.org share IP numbers with knowledgesystems.org.

Name Servers

knowledgesystems.org is delegated to five name servers: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp and ns5.xserver.jp.

knowledgesystems.org at least partially shares name servers with other domains, for instance shizuoka-shigaku.net, moto-factory-ban.com, multipedia.jp, yononakanews.com and web-supportlife.com.

Host names with three IP numbers

ns1.xserver.jp points to: 202.226.36.164, 202.226.36.170 and 202.226.36.246.

ns4.xserver.jp points to: 183.90.224.226, 183.90.224.230 and 202.226.39.247.

ns5.xserver.jp points to: 157.112.182.218, 157.112.182.220 and 202.226.37.247.

Host names with one IP number

ns2.xserver.jp points to: 35.72.43.26.

ns3.xserver.jp points to: 202.226.36.247.

Mail Servers

One mail server handles knowledgesystems.org.

Host name knowledgesystems.org points to IP address 162.43.121.14.

knowledgesystems.org - robtex.com