`teratechkorea.com`

DNSSEC	⚠️ Not signed
NS	`ns1.sdsns.com` ⭐
		A	211.115.203.112^{🇰🇷 HOSTWAY-AS-KR211.115.203.0/24 SejongTelecom.co.ltd}
NS	`ns2.sdsns.com`
		A	211.239.157.110^{🇰🇷 HOSTWAY-AS-KR211.239.157.0/24 SejongTelecom.co.ltd}
MX	`mail.teratechkorea.com` ⭐
		A	223.130.109.61^{🇰🇷 DIRECT-AS-KR223.130.109.0/24}
TXT	`v=spf1 include:_spf1.mailnara.co.kr include:_spf2.mailnara.co.kr include:_spf...`
SOA	`ns1.sdsns.com`firechoi@sds.co.kr 2011-05-26 #9

`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=1776049372

Subdomains

mail.teratechkorea.com

DNS History

3 records (3 active, 0 former)

●NSns1.sdsns.com2015-05-26 → 2026-04-13 · 2 obs

● 2015-05-26 01:41:06
● 2026-04-13 03:06:06

●NSns2.sdsns.com2015-05-26 → 2026-04-13 · 2 obs

● 2015-05-26 01:41:06
● 2026-04-13 03:06:06

●MXmail.teratechkorea.com2015-05-26 → 2026-04-13 · 2 obs

● 2015-05-26 01:41:06
● 2026-04-13 03:06:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
teratechkorea.com	ns1.sdsns.com, ns2.sdsns.com	2 records

✅ Authoritative Response

Server:211.239.157.110

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for teratechkorea.com (unsigned zone)

⏱️ Timing

Total: 693ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns1.sdsns.com, ns2.sdsns.com`
MX	1	`mail.teratechkorea.com (pri: 0)`
TXT	1	`v=spf1 include:_spf1.mailnara.co.kr incl`
SOA	1	`ns1.sdsns.com firechoi.sds.co.kr`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.sdsns.com, ns2.sdsns.com)

Analysis

Hierarchy

teratechkorea.com is a parent of mail.teratechkorea.com.

Name Servers

teratechkorea.com is delegated to two name servers: ns1.sdsns.com and ns2.sdsns.com.

teratechkorea.com uses the same name server setup as other domains, including 78.130.223.in-addr.arpa, iwellcomm.com, ptk21.com, jangannet.co.kr and gmtintl.com.

At least part of the name servers for teratechkorea.com are shared with other domains, for instance daonsnt.com, dgcube.com, sunmin.co.kr, e-ditech.com and bris.ne.kr.

These name servers are commonly used alongside ns1.direct.co.kr and ns2.direct.co.kr.

Hostnames with a single IP

ns1.sdsns.com resolves to: 211.115.203.112.

ns2.sdsns.com resolves to: 211.239.157.110.

Mail Servers

The mail server for teratechkorea.com is mail.teratechkorea.com.

Host mail.teratechkorea.com points to IP 223.130.109.61.

teratechkorea.com - robtex.com