course99.com - robtex.com

course99.com

DNSSEC⚠️ Not signed
NSns1.363.hk ⚠️ Not in zone NS records
A240e:d9:c200::2🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network
A60.247.150.254🇨🇳 CHINANET-SCIDC-AS-AP60.247.128.0/18 SICHUANIDC province network
A118.123.249.114🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center
A118.123.253.132🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center
NSns2.363.hk ⚠️ Not in zone NS records
A240e:d9:c200:1::2🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network
A61.172.183.73🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC
A211.149.230.100🇨🇳 CHINANET-SCIDC-AS-AP211.149.224.0/19 chinanet SC province network-client
NSns3.363.hk ⚠️ Not in zone NS records
A240e:d9:c200::2🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network
A61.172.183.77🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC
A118.123.249.114🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center
NSns4.363.hk ⚠️ Not in zone NS records
A240e:d9:c200:1::2🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network
A118.123.253.132🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center
A211.149.230.100🇨🇳 CHINANET-SCIDC-AS-AP211.149.224.0/19 chinanet SC province network-client
NSns5.363.hk ⚠️ Not in zone NS records
A240e:d9:c200::2🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network
A61.172.183.73🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC
A118.123.249.114🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center
NSns6.363.hk ⚠️ Not in zone NS records
A240e:d9:c200:1::2🇨🇳 CHINANET-SCIDC-AS-AP240e:d9:c000::/36 SICHUANIDC province network
A60.247.150.13🇨🇳 CHINANET-SCIDC-AS-AP60.247.128.0/18 SICHUANIDC province network
A118.123.253.132🇨🇳 CHINANET-SCIDC-AS-AP118.123.240.0/20 CHINANET SiChuan Telecom Internet Data Center

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1781790410

Subdomains

www.course99.com

Same first word

course99.com

DNS History

14 records (6 active, 8 former)

2017201820192020202120222023202420252026NSns1.363.hkns2.363.hkns3.363.hkns4.363.hkns5.363.hkns6.363.hkns1.myhostadmin.netns10.ewallhost.comns11.ewallhost.comns12.ewallhost.comns13.ewallhost.comns2.myhostadmin.netA128.204.193.64CNAMEtyvip2.ikuaimi.com
●NSns1.363.hk2026-04-14 → 2026-06-18 · 3 obs
○ 2017-07-04 16:35:38
● 2026-04-14 03:51:58
● 2026-06-18 14:09:14
○NSns1.myhostadmin.net2026-04-14 → 2026-06-18 · 2 obs
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14
○NSns10.ewallhost.com2016-12-14 → 2017-07-04 · 4 obs
● 2016-12-14 06:35:30
● 2017-07-04 16:35:38
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14
○NSns11.ewallhost.com2016-12-14 → 2017-07-04 · 4 obs
● 2016-12-14 06:35:30
● 2017-07-04 16:35:38
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14
○NSns12.ewallhost.com2016-12-14 → 2017-07-04 · 4 obs
● 2016-12-14 06:35:30
● 2017-07-04 16:35:38
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14
○NSns13.ewallhost.com2016-12-14 → 2017-07-04 · 4 obs
● 2016-12-14 06:35:30
● 2017-07-04 16:35:38
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14
●NSns2.363.hk2026-04-14 → 2026-06-18 · 3 obs
○ 2017-07-04 16:35:38
● 2026-04-14 03:51:58
● 2026-06-18 14:09:14
○NSns2.myhostadmin.net2026-04-14 → 2026-06-18 · 2 obs
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14
●NSns3.363.hk2026-04-14 → 2026-06-18 · 3 obs
○ 2017-07-04 16:35:38
● 2026-04-14 03:51:58
● 2026-06-18 14:09:14
●NSns4.363.hk2026-04-14 → 2026-06-18 · 3 obs
○ 2017-07-04 16:35:38
● 2026-04-14 03:51:58
● 2026-06-18 14:09:14
●NSns5.363.hk2026-04-14 → 2026-06-18 · 3 obs
○ 2017-07-04 16:35:38
● 2026-04-14 03:51:58
● 2026-06-18 14:09:14
●NSns6.363.hk2026-04-14 → 2026-06-18 · 3 obs
○ 2017-07-04 16:35:38
● 2026-04-14 03:51:58
● 2026-06-18 14:09:14
○A128.204.193.642016-12-14 → 2017-07-04 · 4 obs
● 2016-12-14 06:35:30
● 2017-07-04 16:35:38
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14
○CNAMEtyvip2.ikuaimi.com2026-04-14 → 2026-06-18 · 2 obs
○ 2026-04-14 03:51:58
○ 2026-06-18 14:09:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comc.gtld-servers.net, h.gtld-servers.net, b.gtld-servers.net, j.gtld-servers.net...-
course99.comns1.363.hk, ns2.363.hk, ns3.363.hk, ns4.363.hk...-

✅ Authoritative Response

Server:118.123.253.132

NS records: ns1.363.hk, ns2.363.hk, ns3.363.hk, ns4.363.hk, ns5.363.hk, ns6.363.hk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for course99.com (unsigned zone)

⏱️ Timing

Total: 3760ms | Queries: -

📄 Records

TypeCountSample Data

Analysis

Hierarchy

course99.com is a parent domain of www.course99.com.

Name Servers

The DNS delegation for course99.com covers 6 name servers: ns1.363.hk, ns2.363.hk, ns3.363.hk and 3 more.

course99.com shares at least some of its name servers with other domains, including bboht.cn, qpjr.cn, goodgo.cc and two others.

These name servers are frequently seen alongside ns4.363.hk, ns5.363.hk, ns6.363.hk and 6 other name servers.

Hosts pointing to four IP addresses:

ns1.363.hk points to 60.247.150.254, 118.123.249.114, 118.123.253.132 and 240e:d9:c200::2.

Hosts with three IP address records:

ns2.363.hk resolves to three addresses: 61.172.183.73, 211.149.230.100 and 240e:d9:c200:1::2.

ns3.363.hk resolves to three addresses: 61.172.183.77, 118.123.249.114 and 240e:d9:c200::2.

ns4.363.hk resolves to three addresses: 118.123.253.132, 211.149.230.100 and 240e:d9:c200:1::2.

ns5.363.hk resolves to three addresses: 61.172.183.73, 118.123.249.114 and 240e:d9:c200::2.

ns6.363.hk resolves to three addresses: 60.247.150.13, 118.123.253.132 and 240e:d9:c200:1::2.

ns1.363.hk, ns3.363.hk and ns5.363.hk all direct to 240e:d9:c200::2.

ns1.363.hk, ns3.363.hk and ns5.363.hk all direct to 118.123.249.114.

ns1.363.hk, ns4.363.hk and ns6.363.hk all direct to 118.123.253.132.

ns2.363.hk, ns4.363.hk and ns6.363.hk all direct to 240e:d9:c200:1::2.

These two host names — ns2.363.hk and ns5.363.hk — each point to 61.172.183.73 IP addresses.

These two host names — ns2.363.hk and ns4.363.hk — each point to 211.149.230.100 IP addresses.