ddu.ac.kr - robtex.com

ddu.ac.kr

DNSSEC⚠️ Not signed
NSns1.ddu.ac.kr ⭐ ⚠️ Not in parent delegation
A218.53.176.81🇰🇷 SKB-NET218.52.0.0/14 SK Broadband
PTRns1.ddc.ac.kr
NSns1.ddc.ac.kr ⚠️ Not in zone NS records
A218.53.176.81🇰🇷 SKB-NET218.52.0.0/14 SK Broadband
PTRns1.ddc.ac.kr
NSns2.ddc.ac.kr ⚠️ Not in zone NS records
A218.53.176.82🇰🇷 SKB-NET218.52.0.0/14 SK Broadband
PTRns2.ddc.ac.kr
NSns2.ddu.ac.kr ⚠️ Not in parent delegation
A218.53.176.82🇰🇷 SKB-NET218.52.0.0/14 SK Broadband
PTRns2.ddc.ac.kr
MXspam.ddu.ac.kr ⭐
A218.53.176.55🇰🇷 SKB-NET218.52.0.0/14 SK Broadband
PTRgateway.ddc.ac.kr
TXTMS=43C21D1A566832E325A8CF4FFBFB99DD3A4D4CB5
TXTv=spf1 ip4:218.53.176.53 ip4:218.53.176.55 ip4:218.53.176.52 -all
SOAns1.ddu.ac.krroot@ns1.ddu.ac.kr 2009-04-03 #88

ac.kr

DNSSEC⚠️ Not signed
NSg.dns.kr ⭐ ⚠️ Not in parent delegation 🔒
NSb.dns.kr ⚠️ Not in parent delegation
NSc.dns.kr ⚠️ Not in parent delegation 🔒
NSd.dns.kr ⚠️ Not in parent delegation 🔒
NSe.dns.kr ⚠️ Not in parent delegation 🔒
NSf.dns.kr ⚠️ Not in parent delegation 🔒
SOAg.dns.krdomain-manager@nic.or.kr serial=2602270502
WOT: SAFE (99/100)

Up

ns2.ddu.ac.kr
ns1.ddu.ac.kr
spam.ddu.ac.kr
www.ddu.ac.kr

Same first word

ddu.me
ddu.eu
ddu.uz
ddu.ch
ddu.se
ddu.info
ddu.ac.kr
ddu.cn
ddu.de
ddu.com.au
ddu.pl
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ddu.edu.vn
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ddu.by
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ddu.net
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ddu.edu.et
ddu.com
ddu.co
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ddu.in
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ddu.kr
ddu.kz
ddu.ro
ddu.ua
ddu.dk
ddu.it
ddu.com.br
ddu.no
ddu.su
ddu.mx

Similar names

udd.ie
dud.cn
udd.co
udd.info
udd.no
udd.cc
dud.be
dud.edu.in
udd.ru
dud.ro
udd.dk
udd.at
udd.it
udd.us
udd.org
dud.ch
udd.pl
dud.li
udd.cl
udd.ir
udd.fi
udd.be
dud.ath.cx
udd.net
udd.ca
dud.us
dud.com.br
udd.eu
udd.limo
dud.am
dud.de
dud.es
dud.nl
udd.es
dud.at
udd.com.cn
dud.com
dud.in
udd.de
udd.com.tw
dud.ca
dud.dk
udd.com.mx
udd.fr
udd.com.ua
udd.nl
udd.co.nz
dud.fr
udd.cz
udd.in
udd.hr
udd.se
dud.net
dud.co
dud.kr
udd.com
udd.ch

DNS History

5 records (5 active, 0 former)

20162017201820192020202120222023202420252026NSns1.ddc.ac.krns1.ddu.ac.krns2.ddc.ac.krns2.ddu.ac.krMXspam.ddu.ac.kr
●NSns1.ddc.ac.kr2026-02-27 → 2026-02-27 · 3 obs
○ 2015-08-03 07:37:18
● 2026-02-27 10:09:08
● 2026-02-27 10:09:12
●NSns1.ddu.ac.kr2015-08-03 → 2026-02-27 · 2 obs
● 2015-08-03 07:37:18
● 2026-02-27 10:09:12
●NSns2.ddc.ac.kr2026-02-27 → 2026-02-27 · 3 obs
○ 2015-08-03 07:37:18
● 2026-02-27 10:09:08
● 2026-02-27 10:09:12
●NSns2.ddu.ac.kr2015-08-03 → 2026-02-27 · 2 obs
● 2015-08-03 07:37:18
● 2026-02-27 10:09:12
●MXspam.ddu.ac.kr2015-08-03 → 2026-02-27 · 2 obs
● 2015-08-03 07:37:18
● 2026-02-27 10:09:12

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
krb.dns.kr, c.dns.kr, d.dns.kr, e.dns.kr...10 records
ddu.ac.krns1.ddc.ac.kr, ns2.ddc.ac.kr2 records

✅ Authoritative Response

Server: 218.53.176.82

NS records: ns1.ddc.ac.kr, ns2.ddc.ac.kr

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

Validation error at ddu.ac.kr: Error: DNS query timeout: 210.101.60.1 for DS ddu.ac.kr

⏱️ Timing

Total: 3850ms | Queries: -

📄 Records

TypeCountSample Data
NS2ns2.ddu.ac.kr, ns1.ddu.ac.kr
MX1spam.ddu.ac.kr (pri: 0)
TXT2v=spf1 ip4:218.53.176.53 ip4:218.53.176., MS=43C21D1A566832E325A8CF4FFBFB99DD3A4D4
SOA1ns1.ddu.ac.kr root.ns1.ddu.ac.kr

📌 Glue Records Collected

Total: 12

In-bailiwick: 10 (b.dns.kr, c.dns.kr, d.dns.kr...)

Out-of-bailiwick: 2 (ns2.ddc.ac.kr, ns1.ddc.ac.kr)

AI analysis

ddu.ac.kr is a parent of ns2.ddu.ac.kr, ns1.ddu.ac.kr, spam.ddu.ac.kr and www.ddu.ac.kr.

ddu.ac.kr delegates to four name servers: ns1.ddc.ac.kr, ns2.ddc.ac.kr, ns1.ddu.ac.kr and ns2.ddu.ac.kr.

ddu.ac.kr at least partially shares name servers with other domains, for example ddc.ac.kr.

Hostnames with a single IP number:

ns1.ddc.ac.kr points to: 218.53.176.81.

ns2.ddc.ac.kr points to: 218.53.176.82.

ns1.ddu.ac.kr points to: 218.53.176.81.

ns2.ddu.ac.kr points to: 218.53.176.82.

Hostnames pointing to 218.53.176.81: ns1.ddc.ac.kr and ns1.ddu.ac.kr.

Hostnames pointing to 218.53.176.82: ns2.ddc.ac.kr and ns2.ddu.ac.kr.

A single mail server handles ddu.ac.kr, spam.ddu.ac.kr.

Host name spam.ddu.ac.kr resolves to a single IP: 218.53.176.55.