51lu.cc - robtex.com

51lu.cc

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:87b8🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::6815:1a54🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.26.84Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.135.184🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NScourtney.ns.cloudflare.com ⭐
A2606:4700:50::a29f:2682🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcourtney.ns.cloudflare.com
A2803:f800:50::6ca2:c282🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRcourtney.ns.cloudflare.com
A2a06:98c1:50::ac40:2282🇺🇸 Cloudflare2a06:98c1:50::/45
PTRcourtney.ns.cloudflare.com
A108.162.194.130🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A162.159.38.130Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.34.130🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSguy.ns.cloudflare.com
A2606:4700:58::adf5:3bad🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
A2803:f800:50::6ca2:c1ad🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRguy.ns.cloudflare.com
A2a06:98c1:50::ac40:21ad🇺🇸 Cloudflare2a06:98c1:50::/45
PTRguy.ns.cloudflare.com
A108.162.193.173🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
A172.64.33.173🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
A173.245.59.173🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.26.84, 172.67.135.184
IPv6 hints2606:4700:3031::ac43:87b8, 2606:4700:3035::6815:1a54
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=13, name=cloudflare-ech.com
SOAcourtney.ns.cloudflare.comdns@cloudflare.com serial=2409350586

cc

DNSSEC🔒 Signed (DS record present)
NSac1.nstld.com ⭐
NSac2.nstld.com
NSac3.nstld.com
NSac4.nstld.com
SOAac1.nstld.cominfo@verisign-grs.com serial=1784780380

Same first word

51lu.cc
51lu.me

Similar names

15lu.cn
lu15.dev
lu15.com
15lu.com

DNS History

17 records (6 active, 11 former)

20162017201820192020202120222023202420252026NScourtney.ns.cloudflare.comguy.ns.cloudflare.comdns13.hichina.comdns14.hichina.comf1g1ns1.dnspod.netf1g1ns2.dnspod.netMXmail.skrimple.comA104.21.26.84172.67.135.1842606:4700:3031::ac43:87b82606:4700:3035::6815:1a54184.105.178.92188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::CNAMEvhost417.cloudvhost.top
●NScourtney.ns.cloudflare.com2026-06-13 → 2026-07-23 · 3 obs
○ 2017-06-27 10:33:24
● 2026-06-13 01:36:06
● 2026-07-23 04:44:36
○NSdns13.hichina.com2017-06-27 → 2017-06-27 · 4 obs
○ 2016-01-08 14:03:00
● 2017-06-27 10:33:24
○ 2026-06-13 01:36:06
○ 2026-07-23 04:44:36
○NSdns14.hichina.com2017-06-27 → 2017-06-27 · 4 obs
○ 2016-01-08 14:03:00
● 2017-06-27 10:33:24
○ 2026-06-13 01:36:06
○ 2026-07-23 04:44:36
○NSf1g1ns1.dnspod.net2015-08-03 → 2015-08-03 · 3 obs
● 2015-08-03 14:48:26
○ 2016-01-08 14:03:00
○ 2026-07-23 04:44:36
○NSf1g1ns2.dnspod.net2015-08-03 → 2015-08-03 · 3 obs
● 2015-08-03 14:48:26
○ 2016-01-08 14:03:00
○ 2026-07-23 04:44:36
●NSguy.ns.cloudflare.com2026-06-13 → 2026-07-23 · 3 obs
○ 2017-06-27 10:33:24
● 2026-06-13 01:36:06
● 2026-07-23 04:44:36
○MXmail.skrimple.com2015-11-22 → 2015-11-22 · 3 obs
● 2015-11-22 00:02:50
○ 2016-01-08 14:03:00
○ 2026-07-23 04:44:36
●A104.21.26.842026-07-23 → 2026-07-23 · 2 obs
○ 2026-06-13 01:36:06
● 2026-07-23 04:44:36
●A172.67.135.1842026-07-23 → 2026-07-23 · 2 obs
○ 2026-06-13 01:36:06
● 2026-07-23 04:44:36
○A184.105.178.922015-11-22 → 2015-11-22 · 3 obs
● 2015-11-22 00:02:50
○ 2016-01-08 14:03:00
○ 2026-07-23 04:44:36
○A188.114.96.02026-06-13 → 2026-06-13 · 3 obs
○ 2016-01-08 14:03:00
● 2026-06-13 01:36:06
○ 2026-07-23 04:44:36
○A188.114.97.02026-06-13 → 2026-06-13 · 3 obs
○ 2016-01-08 14:03:00
● 2026-06-13 01:36:06
○ 2026-07-23 04:44:36
●A2606:4700:3031::ac43:87b82026-07-23 → 2026-07-23 · 2 obs
○ 2026-06-13 01:36:06
● 2026-07-23 04:44:36
●A2606:4700:3035::6815:1a542026-07-23 → 2026-07-23 · 2 obs
○ 2026-06-13 01:36:06
● 2026-07-23 04:44:36
○A2a06:98c1:3120::2026-06-13 → 2026-06-13 · 3 obs
○ 2016-01-08 14:03:00
● 2026-06-13 01:36:06
○ 2026-07-23 04:44:36
○A2a06:98c1:3121::2026-06-13 → 2026-06-13 · 3 obs
○ 2016-01-08 14:03:00
● 2026-06-13 01:36:06
○ 2026-07-23 04:44:36
○CNAMEvhost417.cloudvhost.top2017-06-27 → 2017-06-27 · 3 obs
● 2017-06-27 10:33:24
○ 2026-06-13 01:36:06
○ 2026-07-23 04:44:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ccac1.nstld.com, ac2.nstld.com, ac3.nstld.com, ac4.nstld.com-
51lu.cccourtney.ns.cloudflare.com, guy.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.34.130

NS records: courtney.ns.cloudflare.com, guy.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51lu.cc (unsigned zone)

⏱️ Timing

Total: 337ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.135.184, 104.21.26.84
AAAA22606:4700:3035::6815:1a54, 2606:4700:3031::ac43:87b8
NS2courtney.ns.cloudflare.com, guy.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1courtney.ns.cloudflare.com dns.cloudflar

Analysis

IP Addresses

51lu.cc directs to four IP numbers, which are 104.21.26.84, 172.67.135.184, 2606:4700:3031::ac43:87b8 and 2606:4700:3035::6815:1a54.

Two other host names, along with wkladki.org.pl, www.radiusonline.com and dns3.whitefrostfarms.com, also share IP numbers with 51lu.cc.

Name Servers

51lu.cc uses two name servers for its delegation: courtney.ns.cloudflare.com and guy.ns.cloudflare.com.

51lu.cc shares its NS records with other domains, for example yyga.cc, 11dj.cc, yk14.cc and two others.

The name servers of 51lu.cc overlap at least partially with those of other domains — among them imoveis.guru, d(0x616e616c)igaalt.site, canadagooseoutletfrance.fr and two more.

These name servers commonly appear in combination with the name servers isaac.ns.cloudflare.com.

DNS names with 6 IP addresses:

Hostname courtney.ns.cloudflare.com directs to 108.162.194.130, 162.159.38.130 and 172.64.34.130 along with 3 other IP addresses.

Hostname guy.ns.cloudflare.com directs to 108.162.193.173, 172.64.33.173 and 173.245.59.173 along with 3 other IP addresses.