`sungjinmtech.com`

DNSSEC	⚠️ Not signed
A	121.78.246.66^{🇰🇷 KINXIDC-AS-KR121.78.246.0/24 KINX_IDC}
NS	`ns1.rootnet.kr` ⭐
		A	103.6.101.39^{🇰🇷 KINXIDC-AS-KR103.6.101.0/24 KINX}
NS	`ns2.rootnet.kr`
		A	121.78.233.131^{🇰🇷 KINXIDC-AS-KR121.78.233.0/24 KINX-IDC}
MX	`mx01.mailplug.com` ⭐
		A	121.156.118.202^{🇰🇷 KT-NET121.152.0.0/13}
			PTR	`mx01.mailplug.com`
		A	121.156.118.204^{🇰🇷 KT-NET121.152.0.0/13}
			PTR	`mx01.mailplug.com`
		A	121.156.118.213^{🇰🇷 KT-NET121.152.0.0/13}
			PTR	`mx01.mailplug.com`
		A	121.156.118.220^{🇰🇷 KT-NET121.152.0.0/13}
			PTR	`mx01.mailplug.com`
		A	121.156.118.223^{🇰🇷 KT-NET121.152.0.0/13}
			PTR	`mx01.mailplug.com`
		A	121.156.118.248^{🇰🇷 KT-NET121.152.0.0/13}
			PTR	`mx01.mailplug.com`
MX	`mx02.mailplug.com`⁽²⁰⁾
		A	223.26.214.9^{🇰🇷 HYOSUNGITX-AS-KR223.26.192.0/18 PACNET (proxy-registered route object)}
		A	223.26.214.10^{🇰🇷 HYOSUNGITX-AS-KR223.26.192.0/18 PACNET (proxy-registered route object)}
TXT	`v=spf1 mx include:mailplug.com ~all`
SOA	`ns1.rootnet.kr`dnsadmin@rootnet.co.kr 2021-02-18 #11

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1777084576

Subdomains

mail.sungjinmtech.com

DNS History

10 records (5 active, 5 former)

○NSns1.hidc.co.kr2015-06-23 → 2017-03-23 · 4 obs

● 2015-06-23 13:50:00
● 2017-03-23 12:15:10
○ 2020-01-03 10:33:30
○ 2026-04-25 02:38:12

●NSns1.rootnet.kr2026-04-25 → 2026-04-25 · 3 obs

○ 2020-01-03 10:33:30
● 2026-04-25 02:38:08
● 2026-04-25 02:38:12

○NSns11.dnstool.net2020-01-03 → 2020-01-03 · 4 obs

○ 2017-03-23 12:15:10
● 2020-01-03 10:33:30
○ 2026-04-25 02:38:08
○ 2026-04-25 02:38:12

○NSns2.hidc.co.kr2015-06-23 → 2017-03-23 · 4 obs

● 2015-06-23 13:50:00
● 2017-03-23 12:15:10
○ 2020-01-03 10:33:30
○ 2026-04-25 02:38:12

●NSns2.rootnet.kr2026-04-25 → 2026-04-25 · 3 obs

○ 2020-01-03 10:33:30
● 2026-04-25 02:38:08
● 2026-04-25 02:38:12

○MXmail.sungjinmtech.com2015-06-23 → 2017-03-23 · 4 obs

● 2015-06-23 13:50:00
● 2017-03-23 12:15:10
○ 2020-01-03 10:33:30
○ 2026-04-25 02:38:12

●MXmx01.mailplug.com2020-01-03 → 2026-04-25 · 3 obs

○ 2017-03-23 12:15:10
● 2020-01-03 10:33:30
● 2026-04-25 02:38:12

●MXmx02.mailplug.com2020-01-03 → 2026-04-25 · 3 obs

○ 2017-03-23 12:15:10
● 2020-01-03 10:33:30
● 2026-04-25 02:38:12

●A121.78.246.662026-04-25 → 2026-04-25 · 3 obs

○ 2020-01-03 10:33:30
● 2026-04-25 02:38:08
● 2026-04-25 02:38:12

○A123.111.231.322015-06-23 → 2020-01-03 · 4 obs

● 2015-06-23 13:50:00
● 2020-01-03 10:33:30
○ 2026-04-25 02:38:08
○ 2026-04-25 02:38:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
sungjinmtech.com	ns1.rootnet.kr, ns2.rootnet.kr	-

✅ Authoritative Response

Server:103.6.101.39

NS records: ns1.rootnet.kr, ns2.rootnet.kr

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sungjinmtech.com (unsigned zone)

⏱️ Timing

Total: 1028ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.78.246.66`
NS	2	`ns1.rootnet.kr, ns2.rootnet.kr`
MX	2	`mx02.mailplug.com (pri: 20), mx01.mailplug.com (pri: 10)`
TXT	1	`v=spf1 mx include:mailplug.com ~all`
SOA	1	`ns1.rootnet.kr dnsadmin.rootnet.co.kr`

Analysis

Hierarchy

The parent of mail.sungjinmtech.com is sungjinmtech.com.

IP Addresses

sungjinmtech.com points to a single IP number: 121.78.246.66.

Other host names, for instance ma1.co.kr, intellics.co.kr, bo-ram.com, korea-intl.com and koreamanntech.com share IP numbers with sungjinmtech.com.

Name Servers

sungjinmtech.com is delegated to two name servers: ns1.rootnet.kr and ns2.rootnet.kr.

sungjinmtech.com uses the same name server setup as other domains, for instance pointfree.net, biblenews.co.kr, insungdiamond.com, healingthehouse.com and residenceh.com.

sungjinmtech.com shares name servers with other domains at least partially, for instance tarotheaven.co.kr, philtour.com, roboractor.com, wowunse.com and auntieannes.co.kr.

these name servers are commonly used with ns1.asternn.kr, ns2.asternn.kr, ns1.hkcomms.co.kr, ns2.hkcomms.co.kr, ns1.intihost.com, ns2.intihost.com, ns1.ist-design.co.kr and ns2.ist-design.co.kr.

Host names with one IP number:

ns1.rootnet.kr points to: 103.6.101.39.

ns2.rootnet.kr points to: 121.78.233.131.

Mail Servers

sungjinmtech.com is handled by two mail servers: mx01.mailplug.com and mx02.mailplug.com.

sungjinmtech.com shares the same mail server setup as other domains, including seedtech.co.kr, elabor.co.kr, artinpost.co.kr, bf-korea.com and biotem.net.

sungjinmtech.com shares some mail servers with other domains, including roonets.co.kr, intsain.com, robonix.co.kr, cmgpharma.co.kr and juneinter.com.

Host name mx01.mailplug.com with six IPs points to 121.156.118.202, 121.156.118.204, 121.156.118.213, 121.156.118.220, 121.156.118.223 and 121.156.118.248; Host name mx02.mailplug.com with two IPs points to 223.26.214.9 and 223.26.214.10.

sungjinmtech.com - robtex.com