21tui.com - robtex.com

21tui.com

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:4202🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:a7c9🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.66.2Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.167.201🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NScrystal.ns.cloudflare.com ⭐
A2606:4700:50::a29f:26ca🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcrystal.ns.cloudflare.com
A2803:f800:50::6ca2:c2ca🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRcrystal.ns.cloudflare.com
A2a06:98c1:50::ac40:22ca🇺🇸 Cloudflare2a06:98c1:50::/45
PTRcrystal.ns.cloudflare.com
A108.162.194.202🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcrystal.ns.cloudflare.com
A162.159.38.202Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcrystal.ns.cloudflare.com
A172.64.34.202🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRcrystal.ns.cloudflare.com
NSthaddeus.ns.cloudflare.com
A2606:4700:58::a29f:2c7f🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRthaddeus.ns.cloudflare.com
A2803:f800:50::6ca2:c37f🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRthaddeus.ns.cloudflare.com
A2a06:98c1:50::ac40:237f🇺🇸 Cloudflare2a06:98c1:50::/45
PTRthaddeus.ns.cloudflare.com
A108.162.195.127🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRthaddeus.ns.cloudflare.com
A162.159.44.127Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRthaddeus.ns.cloudflare.com
A172.64.35.127🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRthaddeus.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.66.2, 172.67.167.201
IPv62606:4700:3033::6815:4202, 2606:4700:3037::ac43:a7c9
SOAcrystal.ns.cloudflare.comdns@cloudflare.com serial=2398355321

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1771291435

Similar names

12tui.com
tui12.com
tui21.com
1tui2.com

DNS History

13 records (6 active, 7 former)

20162017201820192020202120222023202420252026NScrystal.ns.cloudflare.comthaddeus.ns.cloudflare.comf1g1ns1.dnspod.netf1g1ns2.dnspod.netA104.21.66.2172.67.167.2012606:4700:3033::6815:42022606:4700:3037::ac43:a7c947.88.50.1647.88.9.10947.90.20.18058.96.181.32CNAMEns.wangguai.com
●NScrystal.ns.cloudflare.com2026-03-12 → 2026-03-12 · 2 obs
○ 2016-08-12 13:33:12
● 2026-03-12 22:35:32
○NSf1g1ns1.dnspod.net2015-11-19 → 2016-08-12 · 3 obs
● 2015-11-19 19:56:30
● 2016-08-12 13:33:12
○ 2026-03-12 22:35:32
○NSf1g1ns2.dnspod.net2015-11-19 → 2016-08-12 · 3 obs
● 2015-11-19 19:56:30
● 2016-08-12 13:33:12
○ 2026-03-12 22:35:32
●NSthaddeus.ns.cloudflare.com2026-03-12 → 2026-03-12 · 2 obs
○ 2016-08-12 13:33:12
● 2026-03-12 22:35:32
●A104.21.66.22026-03-12 → 2026-03-12 · 2 obs
○ 2017-03-27 21:19:12
● 2026-03-12 22:35:32
●A172.67.167.2012026-03-12 → 2026-03-12 · 2 obs
○ 2017-03-27 21:19:12
● 2026-03-12 22:35:32
●A2606:4700:3033::6815:42022026-03-12 → 2026-03-12 · 2 obs
○ 2017-03-27 21:19:12
● 2026-03-12 22:35:32
●A2606:4700:3037::ac43:a7c92026-03-12 → 2026-03-12 · 2 obs
○ 2017-03-27 21:19:12
● 2026-03-12 22:35:32
○A47.88.50.162016-02-26 → 2016-02-26 · 4 obs
○ 2015-11-19 19:56:30
● 2016-02-26 00:24:00
○ 2017-03-27 21:19:12
○ 2026-03-12 22:35:32
○A47.88.9.1092017-03-27 → 2017-03-27 · 3 obs
○ 2016-02-26 00:24:00
● 2017-03-27 21:19:12
○ 2026-03-12 22:35:32
○A47.90.20.1802017-03-27 → 2017-03-27 · 3 obs
○ 2016-02-26 00:24:00
● 2017-03-27 21:19:12
○ 2026-03-12 22:35:32
○A58.96.181.322015-11-19 → 2015-11-19 · 3 obs
● 2015-11-19 19:56:30
○ 2016-02-26 00:24:00
○ 2026-03-12 22:35:32
○CNAMEns.wangguai.com2015-11-19 → 2016-02-26 · 4 obs
● 2015-11-19 19:56:30
● 2016-02-26 00:24:00
○ 2016-08-12 13:33:12
○ 2026-03-12 22:35:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
21tui.comcrystal.ns.cloudflare.com, thaddeus.ns.cloudflare.com12 records

✅ Authoritative Response

Server: 108.162.195.127

NS records: crystal.ns.cloudflare.com, thaddeus.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21tui.com (unsigned zone)

⏱️ Timing

Total: 119ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.167.201, 104.21.66.2
AAAA22606:4700:3033::6815:4202, 2606:4700:3037::ac43:a7c9
NS2crystal.ns.cloudflare.com, thaddeus.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1crystal.ns.cloudflare.com dns.cloudflare

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

21tui.com resolves to four IPs: 2606:4700:3033::6815:4202, 2606:4700:3037::ac43:a7c9, 104.21.66.2 and 172.67.167.201.

Other host names such as dns1.ifrs.edu.br, imaddaou.com, durcoin.com, www.onlygolfthailand.com and sia.ifrs.edu.br share IP numbers with 21tui.com.

Name Servers

21tui.com is delegated to two name servers: crystal.ns.cloudflare.com and thaddeus.ns.cloudflare.com.

21tui.com uses the same name server setup as other domains, including yunshihui.com, fhm-sz.com, xsd500.com, ruanmupai.com and hebeiliege.com.

At least part of the name servers for 21tui.com are shared with other domains, for instance osgear.help, woocommerce.no, 28(0x787878).net, trademintus.com and printr.money.

These name servers are commonly used alongside apollo.ns.cloudflare.com and viddy.ns.cloudflare.com.

Host names with six IP numbers:

crystal.ns.cloudflare.com points to: 2606:4700:50::a29f:26ca, 2803:f800:50::6ca2:c2ca, 2a06:98c1:50::ac40:22ca, 108.162.194.202, 162.159.38.202 and 172.64.34.202.

thaddeus.ns.cloudflare.com points to: 2606:4700:58::a29f:2c7f, 2803:f800:50::6ca2:c37f, 2a06:98c1:50::ac40:237f, 108.162.195.127, 162.159.44.127 and 172.64.35.127.