`jucb.cn`

DNSSEC	⚠️ Not signed
A	2606:4700:3037::6815:7e8^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:bc15^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.7.232^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.188.21^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`julissa.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2669^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`julissa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c269^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`julissa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2269^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`julissa.ns.cloudflare.com`
		A	108.162.194.105^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`julissa.ns.cloudflare.com`
		A	162.159.38.105^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`julissa.ns.cloudflare.com`
		A	172.64.34.105^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`julissa.ns.cloudflare.com`
NS	`yew.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c50^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yew.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c350^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`yew.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2350^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`yew.ns.cloudflare.com`
		A	108.162.195.80^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yew.ns.cloudflare.com`
		A	162.159.44.80^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yew.ns.cloudflare.com`
		A	172.64.35.80^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`yew.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.7.232, 172.67.188.21
		IPv6 hints	2606:4700:3037::6815:7e8, 2606:4700:3037::ac43:bc15
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=227, name=cloudflare-ech.com
SOA	`julissa.ns.cloudflare.com`dns@cloudflare.com serial=2410230007

`cn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.dns.cn` ⭐
	NS	`b.dns.cn`
	NS	`c.dns.cn`
	NS	`d.dns.cn`
	NS	`e.dns.cn`
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2035106034

Same first word

jucb.cn

Similar names

jubc.com.my

jubc.gr.jp

jcub.xyz

jcub.cn

bjuc.cn

bjcu.net

cjub.com.br

bcuj.org

bjcu.edu.hk

jubc.com

ucjb.com

jubc.cn

bucj.org

bcju.ch

jbuc.de

ujbc.com

jcub.com

ucbj.net

bjuc.com

bucj.com

jcub.edu.au

jubc.ca

cjub.com

jubc.net

DNS History

25 records (6 active, 19 former)

●NSjulissa.ns.cloudflare.com2026-05-25 → 2026-07-29 · 2 obs

● 2026-05-25 02:47:44
● 2026-07-29 13:23:26

●NSyew.ns.cloudflare.com2026-05-25 → 2026-07-29 · 2 obs

● 2026-05-25 02:47:44
● 2026-07-29 13:23:26

○A103.13.73.1672017-01-06 → 2017-01-06 · 4 obs

○ 2017-01-05 12:41:24
● 2017-01-06 13:19:06
○ 2026-05-25 02:47:44
○ 2026-07-29 13:23:26

○A103.13.73.1682017-01-05 → 2017-01-05 · 4 obs

○ 2016-07-18 03:28:50
● 2017-01-05 12:41:24
○ 2017-01-06 13:19:06
○ 2026-07-29 13:23:26

●A104.21.7.2322026-05-25 → 2026-07-29 · 8 obs

○ 2017-01-06 13:19:06
● 2026-05-25 02:47:44
● 2026-06-09 10:29:14
○ 2026-07-04 16:01:36
● 2026-07-11 11:20:24
○ 2026-07-21 09:52:10
● 2026-07-22 19:18:24
● 2026-07-29 13:23:26

●A172.67.188.212026-05-25 → 2026-07-29 · 8 obs

○ 2017-01-06 13:19:06
● 2026-05-25 02:47:44
● 2026-06-09 10:29:14
○ 2026-07-04 16:01:36
● 2026-07-11 11:20:24
○ 2026-07-21 09:52:10
● 2026-07-22 19:18:24
● 2026-07-29 13:23:26

○A183.111.157.682017-01-05 → 2017-01-06 · 5 obs

○ 2016-07-18 03:28:50
● 2017-01-05 12:41:24
● 2017-01-06 13:19:06
○ 2026-05-25 02:47:44
○ 2026-07-29 13:23:26

○A188.114.96.02026-07-04 → 2026-07-21 · 6 obs

○ 2026-06-09 10:29:14
● 2026-07-04 16:01:36
○ 2026-07-11 11:20:24
● 2026-07-21 09:52:10
○ 2026-07-21 10:58:42
○ 2026-07-29 13:23:26

○A188.114.96.42026-07-21 → 2026-07-21 · 4 obs

○ 2026-07-21 09:52:10
● 2026-07-21 10:58:42
○ 2026-07-22 19:18:24
○ 2026-07-29 13:23:26

○A188.114.97.02026-07-04 → 2026-07-21 · 6 obs

○ 2026-06-09 10:29:14
● 2026-07-04 16:01:36
○ 2026-07-11 11:20:24
● 2026-07-21 09:52:10
○ 2026-07-21 10:58:42
○ 2026-07-29 13:23:26

○A188.114.97.42026-07-21 → 2026-07-21 · 4 obs

○ 2026-07-21 09:52:10
● 2026-07-21 10:58:42
○ 2026-07-22 19:18:24
○ 2026-07-29 13:23:26

○A2606:4700:3032::ac43:bc152026-05-25 → 2026-06-09 · 5 obs

○ 2017-01-06 13:19:06
● 2026-05-25 02:47:44
● 2026-06-09 10:29:14
○ 2026-07-04 16:01:36
○ 2026-07-29 13:23:26

○A2606:4700:3035::6815:7e82026-05-25 → 2026-06-09 · 5 obs

○ 2017-01-06 13:19:06
● 2026-05-25 02:47:44
● 2026-06-09 10:29:14
○ 2026-07-04 16:01:36
○ 2026-07-29 13:23:26

●A2606:4700:3037::6815:7e82026-07-11 → 2026-07-29 · 5 obs

○ 2026-07-04 16:01:36
● 2026-07-11 11:20:24
○ 2026-07-21 09:52:10
● 2026-07-22 19:18:24
● 2026-07-29 13:23:26

●A2606:4700:3037::ac43:bc152026-07-11 → 2026-07-29 · 5 obs

○ 2026-07-04 16:01:36
● 2026-07-11 11:20:24
○ 2026-07-21 09:52:10
● 2026-07-22 19:18:24
● 2026-07-29 13:23:26

○A2a06:98c1:3120::2026-07-04 → 2026-07-21 · 6 obs

○ 2026-06-09 10:29:14
● 2026-07-04 16:01:36
○ 2026-07-11 11:20:24
● 2026-07-21 10:58:42
○ 2026-07-22 19:18:24
○ 2026-07-29 13:23:26

○A2a06:98c1:3120::42026-07-21 → 2026-07-21 · 4 obs

○ 2026-07-11 11:20:24
● 2026-07-21 09:52:10
○ 2026-07-21 10:58:42
○ 2026-07-29 13:23:26

○A2a06:98c1:3121::2026-07-04 → 2026-07-21 · 6 obs

○ 2026-06-09 10:29:14
● 2026-07-04 16:01:36
○ 2026-07-11 11:20:24
● 2026-07-21 10:58:42
○ 2026-07-22 19:18:24
○ 2026-07-29 13:23:26

○A2a06:98c1:3121::42026-07-21 → 2026-07-21 · 4 obs

○ 2026-07-11 11:20:24
● 2026-07-21 09:52:10
○ 2026-07-21 10:58:42
○ 2026-07-29 13:23:26

○A42.200.35.1392016-07-18 → 2016-07-18 · 4 obs

○ 2016-03-12 12:37:38
● 2016-07-18 03:28:50
○ 2017-01-05 12:41:24
○ 2026-07-29 13:23:26

○A47.90.20.172016-07-18 → 2016-07-18 · 4 obs

○ 2016-03-12 12:37:38
● 2016-07-18 03:28:50
○ 2017-01-05 12:41:24
○ 2026-07-29 13:23:26

○A58.215.177.2392017-01-05 → 2017-01-05 · 4 obs

○ 2016-07-18 03:28:50
● 2017-01-05 12:41:24
○ 2017-01-06 13:19:06
○ 2026-07-29 13:23:26

○A64.62.224.2532015-12-06 → 2015-12-06 · 3 obs

● 2015-12-06 17:11:00
○ 2016-03-12 12:37:38
○ 2026-07-29 13:23:26

○A74.82.63.1362016-03-12 → 2016-03-12 · 4 obs

○ 2015-12-06 17:11:00
● 2016-03-12 12:37:38
○ 2016-07-18 03:28:50
○ 2026-07-29 13:23:26

○CNAME22.lncdn.com2017-01-05 → 2017-01-06 · 4 obs

● 2017-01-05 12:41:24
● 2017-01-06 13:19:06
○ 2026-05-25 02:47:44
○ 2026-07-29 13:23:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	d.dns.cn, e.dns.cn, a.dns.cn, c.dns.cn...	-
jucb.cn	yew.ns.cloudflare.com, julissa.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.105

NS records: yew.ns.cloudflare.com, julissa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jucb.cn (unsigned zone)

⏱️ Timing

Total: 1136ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.7.232, 172.67.188.21`
AAAA	2	`2606:4700:3037::6815:7e8, 2606:4700:3037::ac43:bc15`
NS	2	`julissa.ns.cloudflare.com, yew.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`julissa.ns.cloudflare.com dns.cloudflare`

Analysis

IP Addresses

jucb.cn directs to four IP numbers, which are 104.21.7.232, 172.67.188.21, 2606:4700:3037::6815:7e8 and 2606:4700:3037::ac43:bc15.

Among the host names that share IP numbers with jucb.cn are letterheadtemplate.net, marjcc.org, mail.teamdejourday.com and two others.

Name Servers

jucb.cn is delegated to two name servers: julissa.ns.cloudflare.com and yew.ns.cloudflare.com.

jucb.cn has the same name server delegation as a number of other domains, such as 86shibo.com, kylk.cn, chinadingkun.com and two more.

There is at least partial name server overlap between jucb.cn and other domains — smgo-protect.pro, cest.com.mx, sunwodaenergy.com and two more among them.

These name servers frequently co-occur with the name servers huxley.ns.cloudflare.com and nico.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

julissa.ns.cloudflare.com resolves to 108.162.194.105, 162.159.38.105, 172.64.34.105 and 3 other IP addresses.

yew.ns.cloudflare.com resolves to 108.162.195.80, 162.159.44.80, 172.64.35.80 and 3 other IP addresses.

jucb.cn - robtex.com

jucb.cn

cn