51du.org - robtex.com

51du.org

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:a22🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:bde3🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.10.34Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.189.227🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSemma.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3a70🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRemma.ns.cloudflare.com
A2803:f800:50::6ca2:c070🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRemma.ns.cloudflare.com
A2a06:98c1:50::ac40:2070🇺🇸 Cloudflare2a06:98c1:50::/45
PTRemma.ns.cloudflare.com
A108.162.192.112🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRemma.ns.cloudflare.com
A172.64.32.112🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRemma.ns.cloudflare.com
A173.245.58.112🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRemma.ns.cloudflare.com
NSrob.ns.cloudflare.com
A2606:4700:58::adf5:3b8c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrob.ns.cloudflare.com
A2803:f800:50::6ca2:c18c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRrob.ns.cloudflare.com
A2a06:98c1:50::ac40:218c🇺🇸 Cloudflare2a06:98c1:50::/45
PTRrob.ns.cloudflare.com
A108.162.193.140🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrob.ns.cloudflare.com
A172.64.33.140🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrob.ns.cloudflare.com
A173.245.59.140🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRrob.ns.cloudflare.com
TXTgoogle-site-verification=ZWsTpakl2zlFUGflHDb4s6CkzkEnL-NTiQqirAXC_tw
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.10.34, 172.67.189.227
IPv62606:4700:3033::6815:a22, 2606:4700:3035::ac43:bde3
SOAemma.ns.cloudflare.comdns@cloudflare.com serial=2396789583

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1771291736

Up

m.51du.org

Same first word

51du.cc
51du.com
51du.org

Similar names

du51.cn

DNS History

12 records (6 active, 6 former)

20162017201820192020202120222023202420252026NSemma.ns.cloudflare.comrob.ns.cloudflare.comMXmail.skrimple.comA104.21.10.34172.67.189.2272606:4700:3033::6815:a222606:4700:3035::ac43:bde3184.105.178.92188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●NSemma.ns.cloudflare.com2026-02-26 → 2026-02-26 · 2 obs
● 2026-02-26 12:57:28
● 2026-02-26 15:07:52
●NSrob.ns.cloudflare.com2026-02-26 → 2026-02-26 · 2 obs
● 2026-02-26 12:57:28
● 2026-02-26 15:07:52
○MXmail.skrimple.com2015-11-19 → 2015-11-19 · 3 obs
● 2015-11-19 06:30:06
○ 2016-03-02 21:19:26
○ 2026-02-26 15:07:52
●A104.21.10.342026-02-26 → 2026-02-26 · 3 obs
○ 2016-03-02 21:19:26
● 2026-02-26 12:57:28
● 2026-02-26 15:07:52
●A172.67.189.2272026-02-26 → 2026-02-26 · 3 obs
○ 2016-03-02 21:19:26
● 2026-02-26 12:57:28
● 2026-02-26 15:07:52
○A184.105.178.922015-11-19 → 2015-11-19 · 3 obs
● 2015-11-19 06:30:06
○ 2016-03-02 21:19:26
○ 2026-02-26 15:07:52
○A188.114.96.02026-02-26 → 2026-02-26 · 2 obs
○ 2026-02-26 12:57:28
○ 2026-02-26 15:07:52
○A188.114.97.02026-02-26 → 2026-02-26 · 2 obs
○ 2026-02-26 12:57:28
○ 2026-02-26 15:07:52
●A2606:4700:3033::6815:a222026-02-26 → 2026-02-26 · 3 obs
○ 2016-03-02 21:19:26
● 2026-02-26 12:57:28
● 2026-02-26 15:07:52
●A2606:4700:3035::ac43:bde32026-02-26 → 2026-02-26 · 3 obs
○ 2016-03-02 21:19:26
● 2026-02-26 12:57:28
● 2026-02-26 15:07:52
○A2a06:98c1:3120::2026-02-26 → 2026-02-26 · 2 obs
○ 2026-02-26 12:57:28
○ 2026-02-26 15:07:52
○A2a06:98c1:3121::2026-02-26 → 2026-02-26 · 2 obs
○ 2026-02-26 12:57:28
○ 2026-02-26 15:07:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
51du.orgrob.ns.cloudflare.com, emma.ns.cloudflare.com-

✅ Authoritative Response

Server: 108.162.192.112

NS records: rob.ns.cloudflare.com, emma.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51du.org (unsigned zone)

⏱️ Timing

Total: 422ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.189.227, 104.21.10.34
AAAA22606:4700:3033::6815:a22, 2606:4700:3035::ac43:bde3
NS2emma.ns.cloudflare.com, rob.ns.cloudflare.com
TXT1google-site-verification=ZWsTpakl2zlFUGf
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1emma.ns.cloudflare.com dns.cloudflare.co

AI analysis

The parent of m.51du.org is 51du.org.

51du.org maps to four IP numbers: 2606:4700:3033::6815:a22, 2606:4700:3035::ac43:bde3, 104.21.10.34 and 172.67.189.227.

other host names include mail12yt.alconssoft.ru, anjibaiquan.com, ultahooosttt.sbs, theaea.org and akep.al; they share IP numbers with 51du.org.

Two name servers emma.ns.cloudflare.com and rob.ns.cloudflare.com handle the delegation for 51du.org.

51du.org shares the same name server setup as other domains, for instance nationalhyperbariccentre.com, s-mania.at, leo.pw, metanovel.org and zorotv.com.lv.

51du.org at least partially shares name servers with other domains, for instance slime.lol, dkohata.cn, iag-usa.com, thecurrencycalculator.com and tlm.solutions.

These name servers are commonly used alongside leif.ns.cloudflare.com, fred.ns.cloudflare.com and lady.ns.cloudflare.com.

Six IP addresses per host:

emma.ns.cloudflare.com points to 2606:4700:50::adf5:3a70, 2803:f800:50::6ca2:c070, 2a06:98c1:50::ac40:2070, 108.162.192.112, 172.64.32.112 and 173.245.58.112; rob.ns.cloudflare.com points to 2606:4700:58::adf5:3b8c, 2803:f800:50::6ca2:c18c, 2a06:98c1:50::ac40:218c, 108.162.193.140, 172.64.33.140 and 173.245.59.140