mail.121security.com - robtex.com

mail.121security.com

CNAMEmail.stackmail.com
DNSSEC⚠️ Not signed
A185.151.28.68🇬🇧 TWENTYI185.151.28.0/24
PTRsmtp.stackmail.com
A185.151.28.84🇬🇧 TWENTYI185.151.28.0/24
A185.151.28.85🇬🇧 TWENTYI185.151.28.0/24

121security.com

DNSSEC⚠️ Not signed
A2a07:7800::166🇬🇧 TWENTYI2a07:7800::/48
A185.151.30.166🇬🇧 TWENTYI185.151.30.0/24
NSns1.falcon365.net ⭐
NSns2.falcon365.net
NSns3.falcon365.net
NSns4.falcon365.net
MXmx.stackmail.com ⭐
SOAns1.falcon365.nethostmaster@falcon365.net serial=1596469824

Previously MX for

121security.com

Same first word

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DNS History

2 records (1 active, 1 former)

20162017201820192020202120222023202420252026A79.170.40.88CNAMEmail.stackmail.com
○A79.170.40.882015-06-23 → 2016-04-21 · 3 obs
● 2015-06-23 09:40:00
● 2016-04-21 07:52:26
○ 2026-05-09 17:53:30
●CNAMEmail.stackmail.com2026-05-09 → 2026-05-09 · 1 obs
● 2026-05-09 17:53:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
121security.comns1.falcon365.net, ns2.falcon365.net, ns3.falcon365.net, ns4.falcon365.net-

✅ Authoritative Response

Server:146.148.28.88

NS records: ns1.falcon365.net, ns2.falcon365.net, ns3.falcon365.net, ns4.falcon365.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 121security.com (unsigned zone)

⏱️ Timing

Total: 887ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1mail.stackmail.com

Analysis

IP Addresses

Three IP numbers (185.151.28.68, 185.151.28.84 and 185.151.28.85) are pointed to by mail.121security.com.

other host names for instance mail.nsm.xcloudnode.com, smtp.stackmail.com, imap.stackmail.com, 185-151-28-84.ptr4.stackcp.net and mail.stackmail.com share IP numbers with mail.121security.com.