`51duokui.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:c037^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::6815:41cd^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.65.205^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.192.55^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`carrera.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26e7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carrera.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2e7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`carrera.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22e7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`carrera.ns.cloudflare.com`
		A	108.162.194.231^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carrera.ns.cloudflare.com`
		A	162.159.38.231^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carrera.ns.cloudflare.com`
		A	172.64.34.231^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carrera.ns.cloudflare.com`
NS	`jim.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b7d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jim.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c17d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jim.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:217d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jim.ns.cloudflare.com`
		A	108.162.193.125^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jim.ns.cloudflare.com`
		A	172.64.33.125^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jim.ns.cloudflare.com`
		A	173.245.59.125^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jim.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.65.205, 172.67.192.55
		IPv6	2606:4700:3031::ac43:c037, 2606:4700:3033::6815:41cd
SOA	`carrera.ns.cloudflare.com`dns@cloudflare.com serial=2399795120

`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=1774722637

Same first word

51duokui.com

DNS History

20 records (6 active, 14 former)

●NScarrera.ns.cloudflare.com2026-02-18 → 2026-03-28 · 3 obs

○ 2017-04-05 14:19:42
● 2026-02-18 10:07:24
● 2026-03-28 18:42:34

●NSjim.ns.cloudflare.com2026-02-18 → 2026-03-28 · 3 obs

○ 2017-04-05 14:19:42
● 2026-02-18 10:07:24
● 2026-03-28 18:42:34

○NSns1.dnsv4.com2015-08-07 → 2017-04-05 · 4 obs

● 2015-08-07 09:38:26
● 2017-04-05 14:19:42
○ 2026-02-18 10:07:24
○ 2026-03-28 18:42:34

○NSns2.dnsv4.com2015-08-07 → 2017-04-05 · 4 obs

● 2015-08-07 09:38:26
● 2017-04-05 14:19:42
○ 2026-02-18 10:07:24
○ 2026-03-28 18:42:34

○MX119.167.247.2302015-12-06 → 2017-04-05 · 5 obs

○ 2015-08-07 09:38:26
● 2015-12-06 01:59:56
● 2017-04-05 14:19:42
○ 2026-02-18 10:07:24
○ 2026-03-28 18:42:34

○MX119.167.247.2302015-08-07 → 2015-08-07 · 3 obs

● 2015-08-07 09:38:26
○ 2015-12-06 01:59:56
○ 2026-03-28 18:42:34

●A104.21.65.2052026-02-18 → 2026-03-28 · 53 obs

○ 2017-04-05 14:19:42
● 2026-02-18 10:07:24
● 2026-02-19 07:03:02
○ 2026-02-19 14:49:28
○ 2026-02-19 18:20:54
● 2026-02-21 16:31:22
○ 2026-02-21 21:55:42
● 2026-02-22 08:46:24
○ 2026-02-22 10:59:06
● 2026-02-22 15:15:46
● 2026-02-23 20:31:56
○ 2026-02-23 23:51:20
○ 2026-02-25 06:28:44
● 2026-02-25 11:15:54
○ 2026-02-26 20:05:02
○ 2026-02-27 22:47:00
● 2026-03-01 09:02:06
○ 2026-03-02 22:08:54
○ 2026-03-04 09:21:20
● 2026-03-04 12:58:50
● 2026-03-05 14:03:10
○ 2026-03-06 03:22:46
○ 2026-03-06 09:36:12
● 2026-03-07 00:15:02
○ 2026-03-07 13:58:48
● 2026-03-08 03:28:06
○ 2026-03-08 10:52:56
● 2026-03-08 20:34:30
○ 2026-03-09 05:01:34
● 2026-03-10 22:24:02
○ 2026-03-11 03:24:00
○ 2026-03-11 09:21:14
● 2026-03-12 06:58:16
● 2026-03-13 08:48:14
○ 2026-03-14 15:28:26
● 2026-03-14 16:40:56
● 2026-03-15 15:20:14
○ 2026-03-15 16:34:18
● 2026-03-16 07:32:36
○ 2026-03-16 15:01:56
○ 2026-03-19 11:14:06
● 2026-03-19 14:15:38
● 2026-03-20 07:16:14
○ 2026-03-20 07:59:22
○ 2026-03-20 18:21:16
● 2026-03-21 23:23:14
○ 2026-03-22 10:05:54
○ 2026-03-22 11:45:44
● 2026-03-24 09:06:06
● 2026-03-25 03:17:14
○ 2026-03-25 14:27:32
● 2026-03-26 07:36:16
● 2026-03-28 18:42:34

○A119.28.48.2132015-12-06 → 2015-12-06 · 4 obs

○ 2015-08-07 09:38:26
● 2015-12-06 01:59:56
○ 2016-01-17 03:17:00
○ 2026-03-28 18:42:34

○A119.28.48.2372015-08-07 → 2016-04-26 · 4 obs

● 2015-08-07 09:38:26
● 2016-04-26 07:45:50
○ 2017-04-05 14:19:42
○ 2026-03-28 18:42:34

○A119.28.48.2382015-08-07 → 2016-01-17 · 4 obs

● 2015-08-07 09:38:26
● 2016-01-17 03:17:00
○ 2016-04-26 07:45:50
○ 2026-03-28 18:42:34

○A119.28.48.2392016-01-17 → 2017-04-05 · 5 obs

○ 2015-12-06 01:59:56
● 2016-01-17 03:17:00
● 2017-04-05 14:19:42
○ 2026-02-18 10:07:24
○ 2026-03-28 18:42:34

●A172.67.192.552026-02-18 → 2026-03-28 · 53 obs

○A188.114.96.02026-02-19 → 2026-03-25 · 51 obs

○ 2026-02-19 07:03:02
● 2026-02-19 14:49:28
● 2026-02-19 18:20:54
○ 2026-02-21 16:31:22
● 2026-02-21 21:55:42
○ 2026-02-22 08:46:24
● 2026-02-22 10:59:06
○ 2026-02-22 15:15:46
○ 2026-02-23 20:31:56
● 2026-02-23 23:51:20
● 2026-02-25 06:28:44
○ 2026-02-25 11:15:54
● 2026-02-26 20:05:02
● 2026-02-27 22:47:00
○ 2026-03-01 09:02:06
● 2026-03-02 22:08:54
● 2026-03-04 09:21:20
○ 2026-03-04 12:58:50
○ 2026-03-05 14:03:10
● 2026-03-06 03:22:46
● 2026-03-06 09:36:12
○ 2026-03-07 00:15:02
● 2026-03-07 13:58:48
○ 2026-03-08 03:28:06
● 2026-03-08 10:52:56
○ 2026-03-08 20:34:30
● 2026-03-09 05:01:34
○ 2026-03-10 22:24:02
● 2026-03-11 03:24:00
● 2026-03-11 09:21:14
○ 2026-03-12 06:58:16
○ 2026-03-13 08:48:14
● 2026-03-14 15:28:26
○ 2026-03-14 16:40:56
○ 2026-03-15 15:20:14
● 2026-03-15 16:34:18
○ 2026-03-16 07:32:36
● 2026-03-16 15:01:56
● 2026-03-19 11:14:06
○ 2026-03-19 14:15:38
○ 2026-03-20 07:16:14
● 2026-03-20 07:59:22
● 2026-03-20 18:21:16
○ 2026-03-21 23:23:14
● 2026-03-22 10:05:54
● 2026-03-22 11:45:44
○ 2026-03-24 09:06:06
○ 2026-03-25 03:17:14
● 2026-03-25 14:27:32
○ 2026-03-26 07:36:16
○ 2026-03-28 18:42:34

○A188.114.97.02026-02-19 → 2026-03-25 · 51 obs

●A2606:4700:3031::ac43:c0372026-02-18 → 2026-03-28 · 53 obs

●A2606:4700:3033::6815:41cd2026-02-18 → 2026-03-28 · 53 obs

○A2a06:98c1:3120::2026-02-19 → 2026-03-25 · 51 obs

○A2a06:98c1:3121::2026-02-19 → 2026-03-25 · 51 obs

○A45.113.70.1222017-04-05 → 2017-04-05 · 4 obs

○ 2016-04-26 07:45:50
● 2017-04-05 14:19:42
○ 2026-02-18 10:07:24
○ 2026-03-28 18:42:34

○CNAMEdnspod-vip4.mydnspod.net2015-08-07 → 2017-04-05 · 4 obs

● 2015-08-07 09:38:26
● 2017-04-05 14:19:42
○ 2026-02-18 10:07:24
○ 2026-03-28 18:42:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51duokui.com	jim.ns.cloudflare.com, carrera.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.125

NS records: jim.ns.cloudflare.com, carrera.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51duokui.com (unsigned zone)

⏱️ Timing

Total: 121ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.65.205, 172.67.192.55`
AAAA	2	`2606:4700:3031::ac43:c037, 2606:4700:3033::6815:41cd`
NS	2	`carrera.ns.cloudflare.com, jim.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`carrera.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (jim.ns.cloudflare.com, jim.ns.cloudflare.com, jim.ns.cloudflare.com...)

Analysis

IP Addresses

51duokui.com refers to four IP numbers: 2606:4700:3031::ac43:c037, 2606:4700:3033::6815:41cd, 104.21.65.205 and 172.67.192.55.

Other host names, for instance pssmart.com, 329ld.com, einerlim.com, upfrontmortgagebrokers.org and lpsc.co share IP numbers with 51duokui.com.

Name Servers

51duokui.com's delegation uses two name servers: carrera.ns.cloudflare.com and jim.ns.cloudflare.com.

51duokui.com uses the same name server setup as other domains, such as lncy0421.cn, kelongjx.com, dlsmtai.net, waishenqi.com and qqshijia.com.

51duokui.com at least partially shares name servers with other domains, including beingsthink.shop, www.sjel.org, megaapp.com.br, marksandbrands.com and theuniguide.co.uk.

These name servers are commonly used with randall.ns.cloudflare.com.

Host names with six IP numbers:

carrera.ns.cloudflare.com points to 2606:4700:50::a29f:26e7, 2803:f800:50::6ca2:c2e7, 2a06:98c1:50::ac40:22e7, 108.162.194.231, 162.159.38.231 and 172.64.34.231.

jim.ns.cloudflare.com points to 2606:4700:58::adf5:3b7d, 2803:f800:50::6ca2:c17d, 2a06:98c1:50::ac40:217d, 108.162.193.125, 172.64.33.125 and 173.245.59.125.

51duokui.com - robtex.com

51duokui.com

com

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`51duokui.com`

`com`