mail.secure21.com - dns.ninja

`mail.secure21.com`

	DNSSEC	⚠️ Not signed
	A	210.175.230.209^{🇯🇵 FRT-AS-18074210.175.224.0/20 FRT-IDC}

`secure21.com`

	DNSSEC	⚠️ Not signed
	A	210.175.230.222^{🇯🇵 FRT-AS-18074210.175.224.0/20 FRT-IDC}
	NS	`dns1.ys-net.ne.jp` ⭐
	NS	`dns2.ys-net.ne.jp`
	MX	`mail.secure21.com` ⭐
	TXT	`v=spf1 mx ~all`
	SOA	`dns1.ys-net.ne.jp`webmaster@ys-net.ne.jp 2011-05-20 #5

MX for

secure21.com

Same first word

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DNS History

1 record (1 active, 0 former)

●A210.175.230.2092026-03-11 → 2026-07-31 · 2 obs

● 2026-03-11 14:45:32
● 2026-07-31 08:40:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
secure21.com	dns1.ys-net.ne.jp, dns2.ys-net.ne.jp	-

✅ Authoritative Response

Server:118.67.93.17

NS records: dns1.ys-net.ne.jp, dns2.ys-net.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for secure21.com (unsigned zone)

⏱️ Timing

Total: 1212ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`210.175.230.209`

Analysis

Mail Server Role

secure21.com uses mail.secure21.com as a mail server.

IP Addresses

mail.secure21.com resolves to one IP address: 210.175.230.209.

mail.4129fujiyoshi.jp, mail.jyomeidesign.com, mail12.ys-net.ne.jp and two other host names share IP numbers with mail.secure21.com.