`mail.willplus.co.jp`

DNSSEC	⚠️ Not signed
A	203.138.159.75^{🇯🇵 InfoSphere203.138.0.0/16 INFOSPHERE}
		PTR	`v0300-075.mailsecure.jp`

`willplus.co.jp`

	DNSSEC	⚠️ Not signed
	A	153.120.31.20^{🇯🇵 SAKURA-A153.120.0.0/17 (2/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan}
	NS	`master.dns.ne.jp` ⭐
	NS	`ns1.dns.ne.jp`
	NS	`ns2.dns.ne.jp`
	MX	`willplus-co-jp.mail.protection.outlook.com` ⭐
	TXT	`v=spf1 ip4:203.138.159.75/32 ip4:35.72.206.193/32 include:spf.protection.outl...`
	TXT	`MS=ms33519050`
	TXT	`DAC=daccpb4j5GevusyRv7d`
	TXT	`google-site-verification=7psklr4zakr8UGjXkwE-v2o9LDzr_Dc3K_U8ONLocSQ`
	SOA	`master.dns.ne.jp`tech@sakura.ad.jp 2026-01-22 #2

Previously MX for

willplus.co.jp

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DNS History

1 record (1 active, 0 former)

●A203.138.159.752026-03-10 → 2026-03-27 · 2 obs

● 2026-03-10 17:36:00
● 2026-03-27 23:58:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
willplus.co.jp	ns2.dns.ne.jp, ns1.dns.ne.jp	2 records

✅ Authoritative Response

Server:133.167.21.1

NS records: ns2.dns.ne.jp, ns1.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for willplus.co.jp (unsigned zone)

⏱️ Timing

Total: 743ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`203.138.159.75`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)

Analysis

IP Addresses

mail.willplus.co.jp points to a single IP address: 203.138.159.75.

Other host names such as mail.v0300-075.mailsecure.jp, v0300-075.mailsecure.jp, mail.v0300-075.mail.arena.ne.jp and mail.volvocar.co.jp share IP numbers with mail.willplus.co.jp.

mail.willplus.co.jp - robtex.com