mail.os21.com - robtex.com

mail.os21.com

DNSSEC⚠️ Not signed
A122.199.221.81🇰🇷 NEXG-AS-KR122.199.221.0/24
PTRstatic.122-199-221-81.nexg.net

os21.com

DNSSEC⚠️ Not signed
A122.199.221.81🇰🇷 NEXG-AS-KR122.199.221.0/24
NSns1.whoisdomain.kr ⭐
NSns2.whoisdomain.kr
NSns3.whoisdomain.kr
NSns4.whoisdomain.kr
MXmail.os21.com ⭐
TXTv=spf1 ip4:122.199.221.81 ip4:122.199.230.199 -all
SOAns1.whoisdomain.krhelp@whois.co.kr 2019-08-29 #1
WOT: UNKNOWN (60/100)

MX for

os21.com

Same first word

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DNS History

2 records (1 active, 1 former)

20162017201820192020202120222023202420252026A122.199.221.81115.88.201.21
○A115.88.201.212015-05-15 → 2016-12-27 · 4 obs
● 2015-05-15 19:10:54
● 2016-12-27 19:59:34
○ 2026-03-25 15:17:22
○ 2026-05-09 19:42:24
●A122.199.221.812026-03-25 → 2026-05-09 · 3 obs
○ 2016-12-27 19:59:34
● 2026-03-25 15:17:22
● 2026-05-09 19:42:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comm.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net...-
os21.comns1.whoisdomain.kr, ns2.whoisdomain.kr, ns3.whoisdomain.kr, ns4.whoisdomain.kr-

✅ Authoritative Response

Server:223.130.139.7

NS records: ns1.whoisdomain.kr, ns2.whoisdomain.kr, ns3.whoisdomain.kr, ns4.whoisdomain.kr

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for os21.com (unsigned zone)

⏱️ Timing

Total: 927ms | Queries: -

📄 Records

TypeCountSample Data
A1122.199.221.81

Analysis

Mail Server Role

mail.os21.com is the mail server for os21.com.

IP Addresses

mail.os21.com maps to IP address 122.199.221.81.

Other host names, for example, os21.com share IP numbers with mail.os21.com.