courses.co.kr - robtex.com

courses.co.kr

DNSSEC⚠️ Not signed
A13.248.169.48🇺🇸 Amazon13.248.160.0/20
PTRa904c694c05102f30.awsglobalaccelerator.com
A76.223.54.146🇺🇸 Amazon76.223.48.0/20
NSns1.afternic.com ⭐
A2603:5:2126::45🇺🇸 GODADDY-DNS2603:5:2120::/44
PTRns1.afternic.com
A97.74.98.69🇺🇸 GODADDY-DNS97.74.98.0/23
PTRns1.afternic.com
NSns2.afternic.com
A2603:5:2226::45🇺🇸 GODADDY-DNS2603:5:2220::/44
PTRns2.afternic.com
A173.201.66.69🇺🇸 GODADDY-DNS173.201.66.0/23
PTRns2.afternic.com
TXTv=spf1 -all
SOAns1.afternic.comdns@jomax.net serial=1

co.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=2608050710
WOT: UNKNOWN (62/100)

Same first word

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sources.com.sa

DNS History

10 records (4 active, 6 former)

20162017201820192020202120222023202420252026NSns1.afternic.comns2.afternic.combuy.internettraffic.comns1.uniregistrymarket.linkns2.uniregistrymarket.linksell.internettraffic.comA13.248.169.4876.223.54.14669.172.201.15369.172.201.208
○NSbuy.internettraffic.com2015-08-04 → 2016-08-19 · 7 obs
● 2015-08-04 22:42:10
● 2015-09-10 19:34:48
○ 2015-11-15 14:14:06
● 2016-02-05 08:52:10
● 2016-08-19 00:12:28
○ 2016-10-16 01:54:20
○ 2026-08-05 05:36:00
●NSns1.afternic.com2026-07-29 → 2026-08-05 · 3 obs
○ 2016-12-19 00:00:14
● 2026-07-29 21:34:26
● 2026-08-05 05:36:00
○NSns1.uniregistrymarket.link2016-10-16 → 2016-12-19 · 5 obs
○ 2016-08-19 00:12:28
● 2016-10-16 01:54:20
● 2016-12-19 00:00:14
○ 2026-07-29 21:34:26
○ 2026-08-05 05:36:00
●NSns2.afternic.com2026-07-29 → 2026-08-05 · 3 obs
○ 2016-12-19 00:00:14
● 2026-07-29 21:34:26
● 2026-08-05 05:36:00
○NSns2.uniregistrymarket.link2016-10-16 → 2016-12-19 · 5 obs
○ 2016-08-19 00:12:28
● 2016-10-16 01:54:20
● 2016-12-19 00:00:14
○ 2026-07-29 21:34:26
○ 2026-08-05 05:36:00
○NSsell.internettraffic.com2015-08-04 → 2016-08-19 · 7 obs
● 2015-08-04 22:42:10
● 2015-09-10 19:34:48
○ 2015-11-15 14:14:06
● 2016-02-05 08:52:10
● 2016-08-19 00:12:28
○ 2016-10-16 01:54:20
○ 2026-08-05 05:36:00
●A13.248.169.482026-07-29 → 2026-08-05 · 3 obs
○ 2016-12-19 00:00:14
● 2026-07-29 21:34:26
● 2026-08-05 05:36:00
○A69.172.201.1532016-08-19 → 2016-12-19 · 5 obs
○ 2016-04-10 20:50:10
● 2016-08-19 00:12:28
● 2016-12-19 00:00:14
○ 2026-07-29 21:34:26
○ 2026-08-05 05:36:00
○A69.172.201.2082015-08-04 → 2016-04-10 · 7 obs
● 2015-08-04 22:42:10
● 2015-09-10 19:34:48
○ 2015-11-15 14:14:06
● 2016-02-05 08:52:10
● 2016-04-10 20:50:10
○ 2016-08-19 00:12:28
○ 2026-08-05 05:36:00
●A76.223.54.1462026-07-29 → 2026-08-05 · 3 obs
○ 2016-12-19 00:00:14
● 2026-07-29 21:34:26
● 2026-08-05 05:36:00

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
krf.dns.kr, e.dns.kr, d.dns.kr, b.dns.kr...10 records
courses.co.krns2.afternic.com, ns1.afternic.com-

✅ Authoritative Response

Server:97.74.98.69

NS records: ns2.afternic.com, ns1.afternic.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for courses.co.kr (unsigned zone)

⏱️ Timing

Total: 632ms | Queries: -

📄 Records

TypeCountSample Data
A276.223.54.146, 13.248.169.48
NS2ns1.afternic.com, ns2.afternic.com
MX1. (pri: 0)
TXT1v=spf1 -all
SOA1ns1.afternic.com dns.jomax.net

📌 Glue Records Collected

Total: 10

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

Analysis

IP Addresses

courses.co.kr points to the IP addresses 13.248.169.48 and 76.223.54.146

Additional host names — www.jangel.com, freemakingmoneyonlineopportunitysite2013.publicsets.com, nullmx.bornc.com and two others — share IP numbers with courses.co.kr.

Name Servers

DNS delegation for courses.co.kr points to two name servers: ns1.afternic.com and ns2.afternic.com.

courses.co.kr shares its name server setup with other domains, including www.sfbbq.com, serialstv.com, www.languagelab.com and two others.

There is at least partial name server overlap between courses.co.kr and other domains — strategi.online, gmasurgical.com, grokdata.com and two more among them.

These name servers frequently co-occur with the name servers verification-m3erh32ujyoastvophjvuz.ns101.verify.hn and verification-a6wcjiy3t6u64zppv78yuf.ns101.verify.hn.

ns1.afternic.com directs to 97.74.98.69 and 2603:5:2126::45. ns2.afternic.com directs to 173.201.66.69 and 2603:5:2226::45. Each host name carries two IP addresses.