sdtsystems.com - dns.ninja
sdtsystems.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 183.111.161.193🇰🇷 KT-NET183.104.0.0/13 KORNET KOREA TELECOM | ||||||
| NS | sdtsystems.com ⭐ | ||||||
| A | 183.111.161.193🇰🇷 KT-NET183.104.0.0/13 KORNET KOREA TELECOM | ||||||
| NS | ns.subnara.info ⚠️ Not in zone NS records | ||||||
| A | 218.145.65.143🇰🇷 KT-NET218.144.0.0/13 KORnet Powered BY Korea Telecom | ||||||
| NS | ns2.subnara.info ⚠️ Not in zone NS records | ||||||
| A | 218.145.65.144🇰🇷 KT-NET218.144.0.0/13 KORnet Powered BY Korea Telecom | ||||||
| MX | kr1-aspmx1.worksmobile.com ⭐ | ||||||
| A | 125.209.209.251🇰🇷 nhn-AS-KR125.209.208.0/22 NAVER business platform | ||||||
| PTR | crcvmail.worksmobile.com | ||||||
| MX | kr1-aspmx2.worksmobile.com(20) | ||||||
| A | 125.209.209.251🇰🇷 nhn-AS-KR125.209.208.0/22 NAVER business platform | ||||||
| PTR | crcvmail.worksmobile.com | ||||||
| TXT | v=spf1 ip4:183.111.161.193 ~all | ||||||
| SOA | sdtsystems.compostmaster@sdtsystems.com serial=20141013 | ||||||
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.netnstld@verisign-grs.com serial=1786740459 | ||||||
NS for
sdtsystems.com |
Subdomains
Same first word
sdtsystems.com |
Similar names
DNS History
12 records (6 active, 6 former)
○NSns.sdtsystems.com2015-08-26 → 2016-11-17 · 4 obs
● 2016-11-17 14:46:46
○ 2026-03-06 14:58:50
○ 2026-08-14 21:06:04
●NSns.subnara.info2026-03-06 → 2026-08-14 · 3 obs
● 2026-03-06 14:58:50
● 2026-08-14 21:06:04
○NSns1.sdtsystems.com2015-08-26 → 2016-11-17 · 4 obs
● 2016-11-17 14:46:46
○ 2026-03-06 14:58:50
○ 2026-08-14 21:06:04
○NSns2.sdtsystems.com2015-08-26 → 2016-11-17 · 4 obs
● 2016-11-17 14:46:46
○ 2026-03-06 14:58:50
○ 2026-08-14 21:06:04
●NSns2.subnara.info2026-03-06 → 2026-08-14 · 3 obs
● 2026-03-06 14:58:50
● 2026-08-14 21:06:04
○NSns3.sdtsystems.com2015-08-26 → 2016-11-17 · 4 obs
● 2016-11-17 14:46:46
○ 2026-03-06 14:58:50
○ 2026-08-14 21:06:04
●NSsdtsystems.com2015-08-26 → 2026-08-14 · 2 obs
● 2026-08-14 21:06:04
○MXalt.aspmx.daum.net2015-08-26 → 2016-11-17 · 4 obs
● 2016-11-17 14:46:46
○ 2026-03-06 14:58:50
○ 2026-08-14 21:06:04
○MXaspmx.daum.net2015-08-26 → 2016-11-17 · 4 obs
● 2016-11-17 14:46:46
○ 2026-03-06 14:58:50
○ 2026-08-14 21:06:04
●MXkr1-aspmx1.worksmobile.com2026-03-06 → 2026-08-14 · 3 obs
● 2026-03-06 14:58:50
● 2026-08-14 21:06:04
●MXkr1-aspmx2.worksmobile.com2026-03-06 → 2026-08-14 · 3 obs
● 2026-03-06 14:58:50
● 2026-08-14 21:06:04
●A183.111.161.1932015-08-26 → 2026-08-14 · 2 obs
● 2026-08-14 21:06:04
🔍 DNS Trace
Analysis
Hierarchy
The domain sdtsystems.com is a parent of ns.sdtsystems.com, ns1.sdtsystems.com, ns3.sdtsystems.com and ns2.sdtsystems.com.
Name Server Role
The NS records for sdtsystems.com point back to sdtsystems.com itself.
ns2.subnara.info and ns.subnara.info are often used as name servers in combination with sdtsystems.com.
IP Addresses
sdtsystems.com resolves to just one IP address, 183.111.161.193.
Two other host names, along with sinhap.kr, bsaf.or.kr and mdqim.com, also share IP numbers with sdtsystems.com.
Name Servers
sdtsystems.com is delegated to three name servers: sdtsystems.com, ns2.subnara.info and ns.subnara.info.
At least some of sdtsystems.com's name servers are shared with other domains, for example ex-ind.com, kumhwacable.co.kr, xn--led-548mm35c.com and two more.
These name servers tend to be deployed in combination with the name servers ns1.subnara.info and ns3.subnara.info.
sdtsystems.com, ns2.subnara.info and ns.subnara.info each resolve to a single IP address: sdtsystems.com resolves to 183.111.161.193, ns2.subnara.info resolves to 218.145.65.144 and ns.subnara.info resolves to 218.145.65.143.
Mail Servers
sdtsystems.com is served by two mail servers, kr1-aspmx1.worksmobile.com and kr1-aspmx2.worksmobile.com.
Among the domains sharing a mail server setup with sdtsystems.com are joslounge.com, jbconst.co.kr, laxtha.com and two others.
There is at least a partial MX overlap between sdtsystems.com and other domains, including edup.co.kr, click.or.kr, hotelsoulkitchen.com and two others.
kr1-aspmx1.worksmobile.com and kr1-aspmx2.worksmobile.com both resolve to the same single IP address: 125.209.209.251.
kr1-aspmx1.worksmobile.com and kr1-aspmx2.worksmobile.com are host names that each point to 125.209.209.251 IP addresses.