`gdtu.cn`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:e63^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:9e9d^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.14.99^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.158.157^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`dolly.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a62^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c062^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dolly.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2062^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dolly.ns.cloudflare.com`
		A	108.162.192.98^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
		A	172.64.32.98^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
		A	173.245.58.98^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dolly.ns.cloudflare.com`
NS	`hank.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b74^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hank.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c174^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`hank.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2174^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`hank.ns.cloudflare.com`
		A	108.162.193.116^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hank.ns.cloudflare.com`
		A	172.64.33.116^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hank.ns.cloudflare.com`
		A	173.245.59.116^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`hank.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.14.99, 172.67.158.157
		IPv6	2606:4700:3032::6815:e63, 2606:4700:3037::ac43:9e9d
SOA	`dolly.ns.cloudflare.com`dns@cloudflare.com serial=2396822357

`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=2034594071

Same first word

gdtu.ru

gdtu.org

gdtu.com

gdtu.fr

gdtu.cn

Similar names

gtdu.de

dgut.com.cn

gdut.org

utgd.de

ugtd.ru

gdut.com

gudt.net

dgut.edu.cn

gutd.de

tdgu.ru

dtug.de

gdut.be

ugdt.com

gdut.edu.cn

udgt.de

gutd.ru

utgd.com

dgut.de

gutd.net

dtug.com

gdut.cn

dgut.org

tdgu.com

utdg.cn

dtug.info

gudt.de

udtg.org

dtgu.com

dugt.ru

dgtu.ru

udgt.com

dgut.top

udtg.info

tudg.com

dtgu.cn

dgut.kasserver.com

utgd.net

gdut.net

gutd.com

dgtu.kr

DNS History

19 records (6 active, 13 former)

○NSdns1.iidns.com2015-10-30 → 2017-06-21 · 5 obs

○ 2015-06-06 23:53:40
● 2015-10-30 20:39:02
● 2017-06-21 14:17:14
○ 2026-03-17 23:06:52
○ 2026-03-27 14:46:38

○NSdns2.iidns.com2015-10-30 → 2016-04-16 · 5 obs

○ 2015-06-06 23:53:40
● 2015-10-30 20:39:02
● 2016-04-16 00:51:38
○ 2026-03-17 23:06:52
○ 2026-03-27 14:46:38

○NSdns3.iidns.com2015-10-30 → 2016-04-16 · 5 obs

○ 2015-06-06 23:53:40
● 2015-10-30 20:39:02
● 2016-04-16 00:51:38
○ 2026-03-17 23:06:52
○ 2026-03-27 14:46:38

○NSdns4.iidns.com2015-10-30 → 2016-04-16 · 5 obs

○ 2015-06-06 23:53:40
● 2015-10-30 20:39:02
● 2016-04-16 00:51:38
○ 2026-03-17 23:06:52
○ 2026-03-27 14:46:38

○NSdns5.iidns.com2015-10-30 → 2016-04-16 · 5 obs

○ 2015-06-06 23:53:40
● 2015-10-30 20:39:02
● 2016-04-16 00:51:38
○ 2026-03-17 23:06:52
○ 2026-03-27 14:46:38

○NSdns6.iidns.com2015-06-06 → 2016-04-16 · 4 obs

● 2015-06-06 23:53:40
● 2016-04-16 00:51:38
○ 2017-06-21 14:17:14
○ 2026-03-27 14:46:38

●NSdolly.ns.cloudflare.com2026-03-17 → 2026-03-27 · 3 obs

○ 2017-06-21 14:17:14
● 2026-03-17 23:06:52
● 2026-03-27 14:46:38

●NShank.ns.cloudflare.com2026-03-17 → 2026-03-27 · 3 obs

○ 2017-06-21 14:17:14
● 2026-03-17 23:06:52
● 2026-03-27 14:46:38

●A104.21.14.992026-03-17 → 2026-03-27 · 3 obs

○ 2017-06-21 14:17:14
● 2026-03-17 23:06:52
● 2026-03-27 14:46:38

○A107.167.19.722016-01-23 → 2016-01-23 · 4 obs

○ 2015-06-06 23:53:40
● 2016-01-23 17:27:10
○ 2016-04-16 00:51:38
○ 2026-03-27 14:46:38

○A107.167.19.732016-01-23 → 2016-01-23 · 4 obs

○ 2015-06-06 23:53:40
● 2016-01-23 17:27:10
○ 2016-04-16 00:51:38
○ 2026-03-27 14:46:38

○A107.167.19.752016-04-16 → 2016-04-16 · 4 obs

○ 2016-01-23 17:27:10
● 2016-04-16 00:51:38
○ 2017-06-21 14:17:14
○ 2026-03-27 14:46:38

○A107.167.19.762016-04-16 → 2016-04-16 · 4 obs

○ 2016-01-23 17:27:10
● 2016-04-16 00:51:38
○ 2017-06-21 14:17:14
○ 2026-03-27 14:46:38

●A172.67.158.1572026-03-17 → 2026-03-27 · 3 obs

○ 2017-06-21 14:17:14
● 2026-03-17 23:06:52
● 2026-03-27 14:46:38

○A198.148.92.872015-06-06 → 2015-06-06 · 3 obs

● 2015-06-06 23:53:40
○ 2017-06-21 14:17:14
○ 2026-03-27 14:46:38

○A198.148.92.882015-06-06 → 2015-06-06 · 3 obs

● 2015-06-06 23:53:40
○ 2017-06-21 14:17:14
○ 2026-03-27 14:46:38

●A2606:4700:3032::6815:e632026-03-17 → 2026-03-27 · 3 obs

○ 2017-06-21 14:17:14
● 2026-03-17 23:06:52
● 2026-03-27 14:46:38

●A2606:4700:3037::ac43:9e9d2026-03-17 → 2026-03-27 · 3 obs

○ 2017-06-21 14:17:14
● 2026-03-17 23:06:52
● 2026-03-27 14:46:38

○CNAMEcs.ename.net2015-06-06 → 2017-06-21 · 4 obs

● 2015-06-06 23:53:40
● 2017-06-21 14:17:14
○ 2026-03-17 23:06:52
○ 2026-03-27 14:46:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
gdtu.cn	hank.ns.cloudflare.com, dolly.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.116

NS records: hank.ns.cloudflare.com, dolly.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for gdtu.cn (unsigned zone)

⏱️ Timing

Total: 1178ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.14.99, 172.67.158.157`
AAAA	2	`2606:4700:3037::ac43:9e9d, 2606:4700:3032::6815:e63`
NS	2	`dolly.ns.cloudflare.com, hank.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`dolly.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

gdtu.cn resolves to four IPs: 2606:4700:3032::6815:e63, 2606:4700:3037::ac43:9e9d, 104.21.14.99 and 172.67.158.157.

Other host names such as img-static-3.deutsches-fernsehen.net, toddpyke.com, movies.prehraj.me, www.southfloridaitstaffing.com and astrabus.ru share IP numbers with gdtu.cn.

Name Servers

gdtu.cn is delegated to two name servers: dolly.ns.cloudflare.com and hank.ns.cloudflare.com.

gdtu.cn uses the same name server setup as other domains, including djfyq.cn, cbsey.cn, 975ms.com, 84951.cn and 88fch.com.

At least part of the name servers for gdtu.cn are shared with other domains, for instance wontek.net, 567477.com, smartinvestmentguide.site, ipanel.workers.dev and josecardenas.com.

Host names with six IP numbers:

dolly.ns.cloudflare.com points to: 2606:4700:50::adf5:3a62, 2803:f800:50::6ca2:c062, 2a06:98c1:50::ac40:2062, 108.162.192.98, 172.64.32.98 and 173.245.58.98.

hank.ns.cloudflare.com points to: 2606:4700:58::adf5:3b74, 2803:f800:50::6ca2:c174, 2a06:98c1:50::ac40:2174, 108.162.193.116, 172.64.33.116 and 173.245.59.116.

gdtu.cn - robtex.com

gdtu.cn

cn

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`gdtu.cn`

`cn`