`knowledge-systemsinc.com`

DNSSEC	⚠️ Not signed
A	103.18.6.218^{🇻🇳 GMO-ZCOM-AS-VN103.18.6.0/23 RUNSYSTEM-VN}
		PTR	`v103-18-6-218.tenten.vn`
NS	`ns-a2.tenten.vn` ⭐
		A	2404:f080:1101:323:a150:95:115:1011^{🇻🇳 GMO-ZCOM-AS-VN2404:f080:1000::/36 GMO-Z.com RUNSYSTEM JSC. Ocean Park Building 6th Floor, 1 Dao Duy Anh, Phuong Mai Ward, Dong Da Dist, Ha Noi}
			PTR	`va150-95-115-101-1.a018.g.han1.static.cnode.io`
		A	137.59.104.66^{🇻🇳 GMO-ZCOM-AS-VN137.59.104.0/22 RUNSYSTEM-VN}
			PTR	`static-pool.tenten.vn`
NS	`ns-a1.tenten.vn`
		A	2404:f080:1101:323:a150:95:115:1010^{🇻🇳 GMO-ZCOM-AS-VN2404:f080:1000::/36 GMO-Z.com RUNSYSTEM JSC. Ocean Park Building 6th Floor, 1 Dao Duy Anh, Phuong Mai Ward, Dong Da Dist, Ha Noi}
			PTR	`va150-95-115-101-0.a018.g.han1.static.cnode.io`
		A	137.59.104.65^{🇻🇳 GMO-ZCOM-AS-VN137.59.104.0/22 RUNSYSTEM-VN}
			PTR	`static-pool.tenten.vn`
NS	`ns-a3.tenten.vn`
		A	2404:f080:1101:323:a150:95:115:1012^{🇻🇳 GMO-ZCOM-AS-VN2404:f080:1000::/36 GMO-Z.com RUNSYSTEM JSC. Ocean Park Building 6th Floor, 1 Dao Duy Anh, Phuong Mai Ward, Dong Da Dist, Ha Noi}
			PTR	`va150-95-115-101-2.a018.g.han1.static.cnode.io`
		A	150.95.111.47^{🇻🇳 GMO-ZCOM-AS-VN150.95.104.0/21 RUNSYSTEM-VN}
			PTR	`ns3.tenten.vn`
MX	`mail.knowledge-systemsinc.com` ⭐
		A	103.18.6.218^{🇻🇳 GMO-ZCOM-AS-VN103.18.6.0/23 RUNSYSTEM-VN}
			PTR	`v103-18-6-218.tenten.vn`
TXT	`v=spf1mxaip4:103.18.6.218~all`
SOA	`ns-a2.tenten.vn`noreply@tenten.vn serial=1782877056

`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=1785466362

⚠️ On DNS blocklist: tif

Same first word

knowledge-systemsinc.com

DNS History

17 records (5 active, 12 former)

●NSns-a1.tenten.vn2026-07-25 → 2026-07-31 · 3 obs

○ 2018-07-24 20:57:44
● 2026-07-25 22:47:18
● 2026-07-31 03:19:56

●NSns-a2.tenten.vn2026-07-25 → 2026-07-31 · 3 obs

○ 2018-07-24 20:57:44
● 2026-07-25 22:47:18
● 2026-07-31 03:19:56

●NSns-a3.tenten.vn2026-07-25 → 2026-07-31 · 3 obs

○ 2018-07-24 20:57:44
● 2026-07-25 22:47:18
● 2026-07-31 03:19:56

○NSns1.hostcentric.net2008-03-17 → 2008-03-17 · 3 obs

● 2008-03-17 13:28:52
○ 2015-06-03 21:05:10
○ 2026-07-31 03:19:56

○NSns1626.ztomy.com2015-11-14 → 2017-01-01 · 5 obs

○ 2015-06-03 21:05:10
● 2015-11-14 18:31:20
● 2017-01-01 15:45:52
○ 2018-07-24 20:57:44
○ 2026-07-31 03:19:56

○NSns1646.ztomy.com2015-06-03 → 2015-06-03 · 4 obs

○ 2008-03-17 13:28:52
● 2015-06-03 21:05:10
○ 2015-11-14 18:31:20
○ 2026-07-31 03:19:56

○NSns2.hostcentric.net2008-03-17 → 2008-03-17 · 3 obs

● 2008-03-17 13:28:52
○ 2015-06-03 21:05:10
○ 2026-07-31 03:19:56

○NSns2626.ztomy.com2015-11-14 → 2017-01-01 · 5 obs

○ 2015-06-03 21:05:10
● 2015-11-14 18:31:20
● 2017-01-01 15:45:52
○ 2018-07-24 20:57:44
○ 2026-07-31 03:19:56

○NSns2646.ztomy.com2015-06-03 → 2015-06-03 · 4 obs

○ 2008-03-17 13:28:52
● 2015-06-03 21:05:10
○ 2015-11-14 18:31:20
○ 2026-07-31 03:19:56

●MXmail.knowledge-systemsinc.com2026-07-25 → 2026-07-31 · 3 obs

○ 2015-06-03 21:05:10
● 2026-07-25 22:47:18
● 2026-07-31 03:19:56

○MXmx.knowledge-systemsinc.com2008-03-17 → 2008-03-17 · 3 obs

● 2008-03-17 13:28:52
○ 2015-06-03 21:05:10
○ 2026-07-31 03:19:56

●A103.18.6.2182026-07-25 → 2026-07-31 · 3 obs

○ 2018-07-24 20:57:44
● 2026-07-25 22:47:18
● 2026-07-31 03:19:56

○A141.8.225.682016-04-29 → 2016-04-29 · 4 obs

○ 2016-01-27 11:21:00
● 2016-04-29 02:25:46
○ 2017-01-01 15:45:52
○ 2026-07-31 03:19:56

○A141.8.226.142015-06-03 → 2015-06-03 · 4 obs

○ 2008-03-17 13:28:52
● 2015-06-03 21:05:10
○ 2015-11-14 18:31:20
○ 2026-07-31 03:19:56

○A204.11.56.482015-11-14 → 2017-01-01 · 7 obs

○ 2015-06-03 21:05:10
● 2015-11-14 18:31:20
● 2016-01-27 11:21:00
○ 2016-04-29 02:25:46
● 2017-01-01 15:45:52
○ 2018-07-24 20:57:44
○ 2026-07-31 03:19:56

○A65.254.228.1002008-03-17 → 2008-03-17 · 3 obs

● 2008-03-17 13:28:52
○ 2015-06-03 21:05:10
○ 2026-07-31 03:19:56

○PTRns1626.ztomy.com2017-01-01 → 2017-01-01 · 3 obs

● 2017-01-01 15:45:52
○ 2018-07-24 20:57:44
○ 2026-07-31 03:19:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
knowledge-systemsinc.com	ns-a1.tenten.vn, ns-a2.tenten.vn, ns-a3.tenten.vn	-

✅ Authoritative Response

Server:150.95.111.47

NS records: ns-a1.tenten.vn, ns-a2.tenten.vn, ns-a3.tenten.vn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledge-systemsinc.com (unsigned zone)

⏱️ Timing

Total: 1416ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`103.18.6.218`
NS	3	`ns-a2.tenten.vn, ns-a3.tenten.vn...`
MX	1	`mail.knowledge-systemsinc.com (pri: 10)`
TXT	1	`v=spf1mxaip4:103.18.6.218~all`
SOA	1	`ns-a2.tenten.vn noreply.tenten.vn`

Analysis

IP Addresses

knowledge-systemsinc.com resolves to one IP address: 103.18.6.218.

redmtnenergy.com, entitymediagroup.com, trctac.com and two other host names share IP numbers with knowledge-systemsinc.com.

Name Servers

knowledge-systemsinc.com is delegated to three name servers: ns-a1.tenten.vn, ns-a2.tenten.vn and ns-a3.tenten.vn.

knowledge-systemsinc.com has at least partial name server overlap with other domains, such as salonphi.com, dichthuathaiphong.com, hc-jp.com and two others.

ns-a1.tenten.vn, ns-a2.tenten.vn and ns-a3.tenten.vn each resolve to two IP addresses: ns-a1.tenten.vn resolves to 137.59.104.65 and 2404:f080:1101:323:a150:95:115:1010; ns-a2.tenten.vn resolves to 137.59.104.66 and 2404:f080:1101:323:a150:95:115:1011; ns-a3.tenten.vn resolves to 150.95.111.47 and 2404:f080:1101:323:a150:95:115:1012.

Mail Servers

Mail for knowledge-systemsinc.com is handled by a single mail server, mail.knowledge-systemsinc.com.

mail.knowledge-systemsinc.com resolves to a single IP number: 103.18.6.218.

knowledge-systemsinc.com - robtex.com