sieff.kr - robtex.com
sieff.kr
| DNSSEC | ⚠️ Not signed | ||||||
| A | 121.78.91.40🇰🇷 KINXIDC-AS-KR121.78.80.0/20 Korea Internet Neutral eXchange | ||||||
| PTR | serverb40.opencom.com | ||||||
| NS | sieff.kr ⭐ | ||||||
| A | 121.78.91.40🇰🇷 KINXIDC-AS-KR121.78.80.0/20 Korea Internet Neutral eXchange | ||||||
| PTR | serverb40.opencom.com | ||||||
| NS | ns.opengogo.com | ||||||
| A | 121.78.91.66🇰🇷 KINXIDC-AS-KR121.78.80.0/20 Korea Internet Neutral eXchange | ||||||
| PTR | serverb66.opencom.com | ||||||
| NS | ns.openhaja.com | ||||||
| A | 121.78.91.2🇰🇷 KINXIDC-AS-KR121.78.80.0/20 Korea Internet Neutral eXchange | ||||||
| PTR | serverb2.opencom.com | ||||||
| MX | mail.sieff.kr ⭐ | ||||||
| A | 121.78.88.26🇰🇷 KINXIDC-AS-KR121.78.80.0/20 Korea Internet Neutral eXchange | ||||||
| PTR | servera26.opencom.com | ||||||
| TXT | v=spf1 ip4:121.78.88.26 ip4:121.78.88.163 ip4:121.78.91.23 ip4:121.78.91.40 i... | ||||||
| SOA | sieff.krwebmaster@sieff.kr 2023-10-20 #14 | ||||||
kr
| DNSSEC | ⚠️ Not signed | ||||||
| NS | g.dns.kr ⭐ | ||||||
| NS | b.dns.kr | ||||||
| NS | c.dns.kr | ||||||
| NS | d.dns.kr | ||||||
| NS | e.dns.kr | ||||||
| NS | f.dns.kr | ||||||
| SOA | g.dns.krdomain-manager@nic.or.kr serial=2607150503 | ||||||
NS for
sieff.kr |
Subdomains
mail.sieff.kr |
Same first word
Similar names
DNS History
6 records (5 active, 1 former)
●NSns.opengogo.com2026-06-10 → 2026-07-14 · 2 obs
● 2026-07-14 21:27:54
●NSns.openhaja.com2026-06-10 → 2026-07-14 · 2 obs
● 2026-07-14 21:27:54
●NSsieff.kr2026-06-10 → 2026-07-14 · 2 obs
● 2026-07-14 21:27:54
●MXmail.sieff.kr2026-06-10 → 2026-07-14 · 2 obs
● 2026-07-14 21:27:54
○A121.78.88.1632026-06-10 → 2026-06-10 · 3 obs
○ 2026-07-14 04:44:36
○ 2026-07-14 21:27:54
●A121.78.91.402026-07-14 → 2026-07-14 · 3 obs
● 2026-07-14 04:44:36
● 2026-07-14 21:27:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| kr | b.dns.kr, c.dns.kr, d.dns.kr, e.dns.kr... | - |
| sieff.kr | ns.opengogo.com, ns.openhaja.com | - |
✅ Authoritative Response
Server:121.78.91.2
NS records: ns.opengogo.com, ns.openhaja.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sieff.kr (unsigned zone)
⏱️ Timing
Total: 2516ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 121.78.91.40 |
| NS | 2 | ns.opengogo.com, ns.openhaja.com |
| MX | 1 | mail.sieff.kr (pri: 10) |
| TXT | 1 | v=spf1 ip4:121.78.88.26 ip4:121.78.88.16 |
| SOA | 1 | sieff.kr webmaster.sieff.kr |
Analysis
Hierarchy
sieff.kr is the parent zone for mail.sieff.kr.
Name Server Role
The NS records for sieff.kr point back to sieff.kr itself.
ns.opengogo.com, ns.openhaja.com and sieff.kr regularly act as name servers together.
IP Addresses
sieff.kr resolves to just one IP address, 121.78.91.40.
Two other host names, along with simonkorea.co.kr, renew.yeskinshop.co.kr and sejong-el.com, also share IP numbers with sieff.kr.
Name Servers
sieff.kr has three authoritative name servers: sieff.kr, ns.opengogo.com and ns.openhaja.com.
sieff.kr partially shares its NS delegation with several other domains, including snsinc.co.kr, officecafe.co.kr, aku.kr and two others.
These name servers are regularly seen alongside ns1.designsoup.co.kr and ns2.designsoup.co.kr as name servers.
sieff.kr, ns.opengogo.com and ns.openhaja.com all have one IP address each — sieff.kr directs to 121.78.91.40, ns.opengogo.com directs to 121.78.91.66 and ns.openhaja.com directs to 121.78.91.2.
Mail Servers
The sole mail server for sieff.kr is mail.sieff.kr.
mail.sieff.kr has exactly one IP number: 121.78.88.26.