duc.work - robtex.com

duc.work

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:1ee6🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:adf6🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.30.230Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.173.246🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NShans.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3baf🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhans.ns.cloudflare.com
A2803:f800:50::6ca2:c1af🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRhans.ns.cloudflare.com
A2a06:98c1:50::ac40:21af🇺🇸 Cloudflare2a06:98c1:50::/45
PTRhans.ns.cloudflare.com
A108.162.193.175🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhans.ns.cloudflare.com
A172.64.33.175🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhans.ns.cloudflare.com
A173.245.59.175🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhans.ns.cloudflare.com
NSmay.ns.cloudflare.com
A2606:4700:50::adf5:3a87🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmay.ns.cloudflare.com
A2803:f800:50::6ca2:c087🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRmay.ns.cloudflare.com
A2a06:98c1:50::ac40:2087🇺🇸 Cloudflare2a06:98c1:50::/45
PTRmay.ns.cloudflare.com
A108.162.192.135🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmay.ns.cloudflare.com
A172.64.32.135🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmay.ns.cloudflare.com
A173.245.58.135🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmay.ns.cloudflare.com
MXmx1.larksuite.com ⭐
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
MXmx2.larksuite.com(5)
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
MXmx3.larksuite.com(10)
A18.139.153.173🇸🇬 Amazon18.138.0.0/15 EC2 SIN prefix
PTRec2-18-139-153-173.ap-southeast-1.compute.amazonaws.com
A101.126.58.223🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,
A122.14.230.154🇨🇳 CHINAMOBILE-CN122.14.224.0/20
TXTv=spf1 +include:spf.onlarksuite.com -all
TXTverification-code-site-App_lark=sxHkrIjSRLJflU8oUK0m
TXTverification-code-site-App_lark=wfoZf4e6Cha1zkAAQ1wQ
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.30.230, 172.67.173.246
IPv6 hints2606:4700:3030::6815:1ee6, 2606:4700:3031::ac43:adf6
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=157, name=cloudflare-ech.com
SOAhans.ns.cloudflare.comdns@cloudflare.com serial=2401705991

work

DNSSEC🔒 Signed (DS record present)
NSa.nic.work ⭐
NSb.nic.work
NSc.nic.work
NSx.nic.work
NSy.nic.work
NSz.nic.work
SOAa.nic.workadmin@tldns.godaddy serial=1778328650
⚠️ On DNS blocklist: tif

Same first word

duc.ru
duc.com
duc.be
duc.com.ar
duc.fi
duc.co
duc.cc
duc.tech
duc.in
duc.com.kw
duc.edu.in
duc.com.br
duc.de
duc.ch
duc.net
duc.us
duc.do
duc.cn
duc.ie
duc.work
duc.biz
duc.cz
duc.at
duc.si
duc.jp
duc.lu
duc.com.mx
duc.edu.iq
duc.koeln
duc.co.uk
duc.co.za
duc.nl
duc.edu.gh
duc.ca
duc.one
duc.vn
duc.me
duc.kr
duc.es
duc.hu
duc.tf
duc.eu
duc.fr
duc.link
duc.dk
duc.nu
duc.edu.sd
duc.as
duc.se

Similar names

udc.us
cud.be
cdu.edu.pl
dcu.net
cdu.it
cdu.me
ucd.edu
udc.edu
cdu.expert
cud.com.pl
dcu.cz
udc.lv
cdu.ie
udc.uz
udc.co
udc.kr
cud.no
dcu.ua
cdu.su
cdu.pl
ucd.ro
cdu.mil.lv
ucd.com.tw
udc.go.ug
cdu.gl
udc.net
udc.co.nz
ucd.ru
cdu.nrw
ucd.jp
ucd.be
ucd.pl
udc.ro
cdu.com.ph
udc.br
ucd.ch
cdu.ac.in
cdu.edu.ua
udc.es
udc.com.mx
cud.re.kr
dcu.kr
udc.ie
cdu.events
udc.ru
cud.co.jp
dcu.co.za
udc.pt
dcu.ru
cud.com.mx
dcu.info
ucd.ie
ucd.money
udc.bg
cdu.one
udc.ch
udc.pl
cud.fr
udc.com
dcu.my
dcu.org.cn
ucd.at
cud.com.au
cdu.cn
cdu.eu
cdu.fr
cud.moda
cdu.watch
cud.io
cud.pl
cdu.nu
udc.edu.ar
udc.org.bw
cdu.al
udc.gal
cud.co
ucd.ac.ma
dcu.academy
udc.com.vn
udc.tv
udc.com.ua
dcu.dk
udc.com.tr
ucd.co.za

DNS History

9 records (9 active, 0 former)

NShans.ns.cloudflare.commay.ns.cloudflare.comMXmx1.larksuite.commx2.larksuite.commx3.larksuite.comA104.21.30.230172.67.173.2462606:4700:3030::6815:1ee62606:4700:3031::ac43:adf6
●NShans.ns.cloudflare.com2026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●NSmay.ns.cloudflare.com2026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●MXmx1.larksuite.com2026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●MXmx2.larksuite.com2026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●MXmx3.larksuite.com2026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●A104.21.30.2302026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●A172.67.173.2462026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●A2606:4700:3030::6815:1ee62026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18
●A2606:4700:3031::ac43:adf62026-05-06 → 2026-05-09 · 2 obs
● 2026-05-06 18:30:40
● 2026-05-09 12:31:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
worka.nic.work, x.nic.work, c.nic.work, b.nic.work...12 records
duc.workmay.ns.cloudflare.com, hans.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.192.135

NS records: may.ns.cloudflare.com, hans.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duc.work (unsigned zone)

⏱️ Timing

Total: 876ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.173.246, 104.21.30.230
AAAA22606:4700:3031::ac43:adf6, 2606:4700:3030::6815:1ee6
NS2hans.ns.cloudflare.com, may.ns.cloudflare.com
MX3mx1.larksuite.com (pri: 1), mx3.larksuite.com (pri: 10)...
TXT3v=spf1 +include:spf.onlarksuite.com -all, verification-code-site-App_lark=sxHkrIjS...
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1hans.ns.cloudflare.com dns.cloudflare.co

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (z.nic.work, y.nic.work, x.nic.work...)

Analysis

IP Addresses

duc.work points to four IP numbers: 2606:4700:3030::6815:1ee6, 2606:4700:3031::ac43:adf6, 104.21.30.230 and 172.67.173.246.

Other host names, for instance yaesu.com.tw, chok.pl, bybitproe.com, karlalara.mx and hoogland.co.za share IP numbers with duc.work.

Name Servers

duc.work's delegation is to two name servers hans.ns.cloudflare.com and may.ns.cloudflare.com.

duc.work shares the same name server configuration as other domains, such as aqdm527.com, aqdm514.com, freedreams.org, cinemaplix.cc and bisho.me.

duc.work at least partially shares its name servers with other domains, for instance returntobasis.com, 01299.cfd, shivampaw.com, naobcasach.pl and ilbet1307.com.

These name servers are commonly used alongside brenda.ns.cloudflare.com and andy.ns.cloudflare.com.

Host names with six IP numbers:

hans.ns.cloudflare.com points to: 2606:4700:58::adf5:3baf, 2803:f800:50::6ca2:c1af, 2a06:98c1:50::ac40:21af, 108.162.193.175, 172.64.33.175 and 173.245.59.175.

may.ns.cloudflare.com points to: 2606:4700:50::adf5:3a87, 2803:f800:50::6ca2:c087, 2a06:98c1:50::ac40:2087, 108.162.192.135, 172.64.32.135 and 173.245.58.135.

Mail Servers

duc.work is handled by three mail servers: mx1.larksuite.com, mx2.larksuite.com and mx3.larksuite.com.

duc.work shares some mail servers with other domains, including synertec.org, metech.com.vn, wenfu.cn, amonster.net and kumex.com.

Host names with three IP numbers: mx3.larksuite.com points to 18.139.153.173, 101.126.58.223 and 122.14.230.154.

Host names with one IP number: mx1.larksuite.com points to 18.139.153.173; mx2.larksuite.com points to 18.139.153.173.

Host names that point to 18.139.153.173: mx3.larksuite.com, mx1.larksuite.com and mx2.larksuite.com.