postmaster.jetsystem21c.com - robtex.com

postmaster.jetsystem21c.com

CNAMEjetsystem21c.com
DNSSEC⚠️ Not signed
A183.111.182.209🇰🇷 KT-NET183.104.0.0/13 KORNET KOREA TELECOM
NSjetsystem21c.com ⭐
A183.111.182.209🇰🇷 KT-NET183.104.0.0/13 KORNET KOREA TELECOM
NSns.jetsystem21c.com ⚠️ Not in parent delegation
A218.145.65.143🇰🇷 KT-NET218.144.0.0/13 KORnet Powered BY Korea Telecom
NSns.nayooint.co.kr ⚠️ Not in zone NS records
A218.145.65.143🇰🇷 KT-NET218.144.0.0/13 KORnet Powered BY Korea Telecom
NSns1.jetsystem21c.com ⚠️ Not in parent delegation
A116.126.143.226🇰🇷 SKB-NET116.126.0.0/16 SK Broadband
NSns1.nayooint.co.kr ⚠️ Not in zone NS records
A116.126.143.226🇰🇷 SKB-NET116.126.0.0/16 SK Broadband
NSns2.jetsystem21c.com ⚠️ Not in parent delegation
A218.145.65.144🇰🇷 KT-NET218.144.0.0/13 KORnet Powered BY Korea Telecom
NSns3.jetsystem21c.com ⚠️ Not in parent delegation
A116.126.143.225🇰🇷 SKB-NET116.126.0.0/16 SK Broadband
MXrmw-002.fmcity.com ⭐
A211.34.104.37🇰🇷 KT-NET211.34.104.0/24
PTRrmw-002.fmcity.com
TXTv=spf1 ip4:211.34.104.37 ~all
SOAjetsystem21c.compostmaster@jetsystem21c.com serial=20200506

jetsystem21c.com

DNSSEC⚠️ Not signed
A183.111.182.209🇰🇷 KT-NET183.104.0.0/13 KORNET KOREA TELECOM
NSjetsystem21c.com ⭐
NSns.jetsystem21c.com ⚠️ Not in parent delegation
NSns.nayooint.co.kr ⚠️ Not in zone NS records
NSns1.jetsystem21c.com ⚠️ Not in parent delegation
NSns1.nayooint.co.kr ⚠️ Not in zone NS records
NSns2.jetsystem21c.com ⚠️ Not in parent delegation
NSns3.jetsystem21c.com ⚠️ Not in parent delegation
MXrmw-002.fmcity.com ⭐
TXTv=spf1 ip4:211.34.104.37 ~all
SOAjetsystem21c.compostmaster@jetsystem21c.com serial=20200506
rank #883631 globally
rank #397560 in the tld

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DNS History

1 record (1 active, 0 former)

CNAMEjetsystem21c.com
●CNAMEjetsystem21c.com2026-04-26 → 2026-04-26 · 2 obs
● 2026-04-26 02:59:24
● 2026-04-26 02:59:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
jetsystem21c.comns.nayooint.co.kr, ns1.nayooint.co.kr-

✅ Authoritative Response

Server:116.126.143.226

NS records: ns.nayooint.co.kr, ns1.nayooint.co.kr

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jetsystem21c.com (unsigned zone)

⏱️ Timing

Total: 1066ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1jetsystem21c.com

Analysis

IP Addresses

postmaster.jetsystem21c.com resolves to a single IP: 183.111.182.209.

Other host names, for instance tytech.kr, forcell.co.kr, tjtechno.co.kr, kosisa.com and breadtv.net share IP numbers with postmaster.jetsystem21c.com.

Name Servers

postmaster.jetsystem21c.com is delegated to seven name servers: jetsystem21c.com, ns1.jetsystem21c.com, ns2.jetsystem21c.com, ns3.jetsystem21c.com, ns.jetsystem21c.com, ns1.nayooint.co.kr and ns.nayooint.co.kr.

postmaster.jetsystem21c.com shares some name servers with other domains, for example terinuu.com, marsa.or.kr, yeonji.org, goodmorningbus.com and cityone.kr.

these name servers are often used with ns2.nayooint.co.kr, ns3.nayooint.co.kr, ns1.terinuu.com, ns2.terinuu.com, ns3.terinuu.com, ns.terinuu.com, ns1.marsa.or.kr, ns2.marsa.or.kr, ns3.marsa.or.kr and ns.marsa.or.kr.

Host names with a single IP

jetsystem21c.com maps to 183.111.182.209.

ns1.jetsystem21c.com maps to 116.126.143.226.

ns2.jetsystem21c.com maps to 218.145.65.144.

ns3.jetsystem21c.com maps to 116.126.143.225.

ns.jetsystem21c.com maps to 218.145.65.143.

ns1.nayooint.co.kr maps to 116.126.143.226.

ns.nayooint.co.kr maps to 218.145.65.143.

Host names mapping to 116.126.143.226: ns1.jetsystem21c.com and ns1.nayooint.co.kr.

Host names mapping to 218.145.65.143: ns.jetsystem21c.com and ns.nayooint.co.kr.

Mail Servers

postmaster.jetsystem21c.com is handled by a single mail server, rmw-002.fmcity.com.

postmaster.jetsystem21c.com shares the mail server setup with other domains, for example miac.co.kr, ecofish.co.kr, hearing119.com, chunji365.com and ktra.com.

postmaster.jetsystem21c.com shares some mail servers with other domains at least partially, for instance playpump.co.kr and xn--2e0ba711r58b.org.

Host name rmw-002.fmcity.com points to IP 211.34.104.37.