`51ct.net`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:a8da^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::6815:1b1f^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.27.31^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.168.218^{🇺🇸 Cloudflare172.67.160.0/20 , 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	`lynn.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bc9^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lynn.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1c9^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lynn.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21c9^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lynn.ns.cloudflare.com`
		A	108.162.193.201^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lynn.ns.cloudflare.com`
		A	172.64.33.201^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lynn.ns.cloudflare.com`
		A	173.245.59.201^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lynn.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.27.31, 172.67.168.218
		IPv6	2606:4700:3031::ac43:a8da, 2606:4700:3032::6815:1b1f
SOA	`dolly.ns.cloudflare.com`dns@cloudflare.com serial=2398381093

`net`

	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=1774907587

⚠️ On DNS blocklist: tif

Subdomains

www.51ct.net

Same first word

51ct.net

51ct.org

51ct.cn

Similar names

c15t.com

5tc1.de

51tc.net.cn

c15t.dev

DNS History

18 records (6 active, 12 former)

○NSdns1.name-services.com2007-10-13 → 2007-10-13 · 3 obs

● 2007-10-13 17:51:50
○ 2015-10-16 06:36:42
○ 2026-03-30 22:08:50

○NSdns2.name-services.com2007-10-13 → 2007-10-13 · 3 obs

● 2007-10-13 17:51:50
○ 2015-10-16 06:36:42
○ 2026-03-30 22:08:50

○NSdns3.name-services.com2007-10-13 → 2007-10-13 · 3 obs

● 2007-10-13 17:51:50
○ 2015-10-16 06:36:42
○ 2026-03-30 22:08:50

○NSdns4.name-services.com2007-10-13 → 2007-10-13 · 3 obs

● 2007-10-13 17:51:50
○ 2015-10-16 06:36:42
○ 2026-03-30 22:08:50

○NSdns5.name-services.com2007-10-13 → 2007-10-13 · 3 obs

● 2007-10-13 17:51:50
○ 2015-10-16 06:36:42
○ 2026-03-30 22:08:50

●NSdolly.ns.cloudflare.com2026-03-28 → 2026-03-30 · 3 obs

○ 2017-05-13 23:25:28
● 2026-03-28 13:09:10
● 2026-03-30 22:08:50

●NSlynn.ns.cloudflare.com2026-03-28 → 2026-03-30 · 3 obs

○ 2017-05-13 23:25:28
● 2026-03-28 13:09:10
● 2026-03-30 22:08:50

○NSns1.51dns.com2015-10-16 → 2016-07-17 · 5 obs

○ 2007-10-13 17:51:50
● 2015-10-16 06:36:42
● 2016-07-17 22:21:00
○ 2017-05-13 23:25:28
○ 2026-03-30 22:08:50

○NSns1.sedoparking.com2017-05-13 → 2017-05-13 · 4 obs

○ 2016-07-17 22:21:00
● 2017-05-13 23:25:28
○ 2026-03-28 13:09:10
○ 2026-03-30 22:08:50

○NSns2.51dns.com2015-10-16 → 2016-07-17 · 5 obs

○ 2007-10-13 17:51:50
● 2015-10-16 06:36:42
● 2016-07-17 22:21:00
○ 2017-05-13 23:25:28
○ 2026-03-30 22:08:50

○NSns2.sedoparking.com2017-05-13 → 2017-05-13 · 4 obs

○ 2016-07-17 22:21:00
● 2017-05-13 23:25:28
○ 2026-03-28 13:09:10
○ 2026-03-30 22:08:50

○MXlocalhost2017-05-13 → 2017-05-13 · 3 obs

● 2017-05-13 23:25:28
○ 2026-03-28 13:09:10
○ 2026-03-30 22:08:50

●A104.21.27.312026-03-28 → 2026-03-30 · 3 obs

○ 2017-05-13 23:25:28
● 2026-03-28 13:09:10
● 2026-03-30 22:08:50

●A172.67.168.2182026-03-28 → 2026-03-30 · 3 obs

○ 2017-05-13 23:25:28
● 2026-03-28 13:09:10
● 2026-03-30 22:08:50

●A2606:4700:3031::ac43:a8da2026-03-28 → 2026-03-30 · 3 obs

○ 2017-05-13 23:25:28
● 2026-03-28 13:09:10
● 2026-03-30 22:08:50

●A2606:4700:3032::6815:1b1f2026-03-28 → 2026-03-30 · 3 obs

○ 2017-05-13 23:25:28
● 2026-03-28 13:09:10
● 2026-03-30 22:08:50

○A72.52.4.902017-05-13 → 2017-05-13 · 4 obs

○ 2015-10-16 06:36:42
● 2017-05-13 23:25:28
○ 2026-03-28 13:09:10
○ 2026-03-30 22:08:50

○A8.15.231.222007-10-13 → 2007-10-13 · 3 obs

● 2007-10-13 17:51:50
○ 2015-10-16 06:36:42
○ 2026-03-30 22:08:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51ct.net	dolly.ns.cloudflare.com, lynn.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.98

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51ct.net (unsigned zone)

⏱️ Timing

Total: 381ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.168.218, 104.21.27.31`
AAAA	2	`2606:4700:3031::ac43:a8da, 2606:4700:3032::6815:1b1f`
NS	2	`dolly.ns.cloudflare.com, lynn.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`dolly.ns.cloudflare.com dns.cloudflare.c`

Analysis

Hierarchy

The parent of www.51ct.net is 51ct.net.

IP Addresses

51ct.net maps to four IP numbers: 2606:4700:3031::ac43:a8da, 2606:4700:3032::6815:1b1f, 104.21.27.31 and 172.67.168.218.

other host names include citykeys.com.hk, 31clubmy.com, 3d-fit.be, www.bk9777.com and bojestveni.com; they share IP numbers with 51ct.net.

Name Servers

Two name servers dolly.ns.cloudflare.com and lynn.ns.cloudflare.com handle the delegation for 51ct.net.

51ct.net shares the same name server setup as other domains, for instance hrwz.net, 51bl22.me, jsbacjr.com, fantasi.one and awjqapp.com.

51ct.net at least partially shares name servers with other domains, for instance financexrp-reward.com, fake.build, impaas.net, rcairspace.com and cololi.moe.

These name servers are commonly used alongside hank.ns.cloudflare.com, ophelia.ns.cloudflare.com and jason.ns.cloudflare.com.

Six IP addresses per host:

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; lynn.ns.cloudflare.com points to 2606:4700:58::adf5:3bc9, 2803:f800:50::6ca2:c1c9, 2a06:98c1:50::ac40:21c9, 108.162.193.201, 172.64.33.201 and 173.245.59.201

51ct.net - robtex.com

51ct.net

net

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

`51ct.net`

`net`