`cuplcourses.com`

DNSSEC	⚠️ Not signed
A	144.48.6.40^{🇭🇰 BSL-AS-AP144.48.6.0/24 KLAYER LLC 1603 Capitol Ave Ste 310}
		PTR	`144.48.6.40.static.local.isp`
NS	`ns1.julydns.com` ⭐ ⚠️ Not in parent delegation
		A	47.97.51.45^{🇨🇳 Alibaba-Cloud47.96.0.0/15 Aliyun Computing Co., LTD}
NS	`ns1.judns.com` ⚠️ Not in zone NS records
		A	47.97.51.45^{🇨🇳 Alibaba-Cloud47.96.0.0/15 Aliyun Computing Co., LTD}
NS	`ns2.judns.com` ⚠️ Not in zone NS records
		A	162.159.27.251^{Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns2.julydns.com` ⚠️ Not in parent delegation
		A	162.159.48.223^{Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`ns1.julydns.com`master@jmdns.com serial=1769851319

`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=1774567867

Subdomains

www.cuplcourses.com

Same first word

cuplcourses.com

DNS History

10 records (5 active, 5 former)

○NSjm1.dns.com2020-01-19 → 2020-01-19 · 4 obs

○ 2016-04-15 07:22:50
● 2020-01-19 15:52:38
○ 2026-03-05 08:30:28
○ 2026-03-26 23:35:32

○NSjm2.dns.com2020-01-19 → 2020-01-19 · 4 obs

○ 2016-04-15 07:22:50
● 2020-01-19 15:52:38
○ 2026-03-05 08:30:28
○ 2026-03-26 23:35:32

○NSns1.51dns.com2015-10-24 → 2015-10-24 · 3 obs

● 2015-10-24 16:32:28
○ 2016-04-15 07:22:50
○ 2026-03-26 23:35:32

●NSns1.judns.com2026-03-05 → 2026-03-26 · 3 obs

○ 2020-01-19 15:52:38
● 2026-03-05 08:30:28
● 2026-03-26 23:35:32

●NSns1.julydns.com2026-03-05 → 2026-03-26 · 3 obs

○ 2020-01-19 15:52:38
● 2026-03-05 08:30:28
● 2026-03-26 23:35:32

○NSns2.51dns.com2015-10-24 → 2015-10-24 · 3 obs

● 2015-10-24 16:32:28
○ 2016-04-15 07:22:50
○ 2026-03-26 23:35:32

●NSns2.judns.com2026-03-05 → 2026-03-26 · 3 obs

○ 2020-01-19 15:52:38
● 2026-03-05 08:30:28
● 2026-03-26 23:35:32

●NSns2.julydns.com2026-03-05 → 2026-03-26 · 3 obs

○ 2020-01-19 15:52:38
● 2026-03-05 08:30:28
● 2026-03-26 23:35:32

○A108.186.131.802015-05-07 → 2015-10-24 · 4 obs

● 2015-05-07 13:46:50
● 2015-10-24 16:32:28
○ 2016-04-15 07:22:50
○ 2026-03-26 23:35:32

●A144.48.6.402026-03-05 → 2026-03-26 · 3 obs

○ 2016-04-15 07:22:50
● 2026-03-05 08:30:28
● 2026-03-26 23:35:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, c.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net...	-
cuplcourses.com	ns1.judns.com, ns2.judns.com	2 records

✅ Authoritative Response

Server:47.97.51.45

NS records: ns1.judns.com, ns2.judns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cuplcourses.com (unsigned zone)

⏱️ Timing

Total: 572ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`144.48.6.40`
NS	2	`ns1.julydns.com, ns2.julydns.com`
SOA	1	`ns1.julydns.com master.jmdns.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.judns.com, ns2.judns.com)

Analysis

Hierarchy

cuplcourses.com is the parent of www.cuplcourses.com.

IP Addresses

cuplcourses.com resolves to a single IP: 144.48.6.40.

Other host names, for instance mumukeji.com, cdsftt.com, chubangbang.com, jiaoyupingtai.com and jinglon.com share IP numbers with cuplcourses.com.

Name Servers

cuplcourses.com is delegated to four name servers: ns1.judns.com, ns2.judns.com, ns1.julydns.com and ns2.julydns.com.

cuplcourses.com shares some name servers with other domains, for example sdbcn.net, lpbd.cn, buddharobot.com, amjue.com and byvisuals.com.