`mail.sieff.kr`

DNSSEC	⚠️ Not signed
A	121.78.88.26^{🇰🇷 KINXIDC-AS-KR121.78.80.0/20 Korea Internet Neutral eXchange}
		PTR	`servera26.opencom.com`

`sieff.kr`

	DNSSEC	⚠️ Not signed
	A	121.78.88.163^{🇰🇷 KINXIDC-AS-KR121.78.80.0/20 Korea Internet Neutral eXchange}
	NS	`sieff.kr` ⭐
	NS	`ns.opengogo.com`
	NS	`ns.openhaja.com`
	MX	`mail.sieff.kr` ⭐
	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.kr`webmaster@sieff.kr 2023-10-20 #13

MX for

sieff.kr

Same first word

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DNS History

1 record (1 active, 0 former)

●A121.78.88.262026-07-03 → 2026-07-14 · 2 obs

● 2026-07-03 19:06:40
● 2026-07-14 04:44:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
kr	b.dns.kr, c.dns.kr, d.dns.kr, e.dns.kr...	-
sieff.kr	ns.openhaja.com, ns.opengogo.com	-

✅ Authoritative Response

Server:121.78.91.66

NS records: ns.openhaja.com, ns.opengogo.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sieff.kr (unsigned zone)

⏱️ Timing

Total: 2110ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.78.88.26`

Analysis

Mail Server Role

mail.sieff.kr serves as a mail server for sieff.kr.

IP Addresses

mail.sieff.kr points to a single IP number: 121.78.88.26.

Additional host names — mail.unilecture.com, mail.sharonewha.org, mail.linesystem.co.kr and two others — share IP numbers with mail.sieff.kr.

mail.sieff.kr - robtex.com

mail.sieff.kr

sieff.kr