`mail.initialize.co.jp`

DNSSEC	⚠️ Not signed
A	133.125.39.37^{🇯🇵 SAKURA-A133.125.0.0/16 (ISHIKARI) SAKURA Internet // EAST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan}
		PTR	`ik1-437-50783.vs.sakura.ne.jp`

`initialize.co.jp`

	DNSSEC	⚠️ Not signed
	A	160.251.206.239^{🇯🇵 GMOOSK-NET160.251.206.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan}
	NS	`dns1.initialize.co.jp` ⭐
	NS	`dns2.initialize.co.jp`
	MX	`mail.initialize.co.jp` ⭐
	TXT	`v=spf1 a:mail.initialize.co.jp ip4:133.18.162.51 ip4:133.125.39.37 ip4:160.25...`
	SOA	`dns1.initialize.co.jp`hostmaster@initialize.co.jp 2026-01-04 #2

MX for

initialize.co.jp

Same first word

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DNS History

3 records (1 active, 2 former)

○A122.215.228.42016-01-09 → 2016-09-05 · 5 obs

○ 1970-01-01 00:00:00
● 2016-01-09 21:34:26
● 2016-09-05 16:06:16
○ 2026-03-24 21:18:16
○ 2026-03-24 23:03:12

○A122.215.228.421970-01-01 → 1970-01-01 · 3 obs

● 1970-01-01 00:00:00
○ 2016-01-09 21:34:26
○ 2026-03-24 23:03:12

●A133.125.39.372026-03-24 → 2026-03-24 · 3 obs

○ 2016-09-05 16:06:16
● 2026-03-24 21:18:16
● 2026-03-24 23:03:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	g.dns.jp, a.dns.jp, c.dns.jp, e.dns.jp...	-
initialize.co.jp	dns1.initialize.co.jp, dns2.initialize.co.jp	2 records

✅ Authoritative Response

Server:160.248.91.64

NS records: dns1.initialize.co.jp, dns2.initialize.co.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 2078ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`133.125.39.37`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (dns1.initialize.co.jp, dns2.initialize.co.jp)

Analysis

Mail Server Role

mail.initialize.co.jp functions as a mail server for initialize.co.jp.

IP Addresses

mail.initialize.co.jp resolves to one IP number: 133.125.39.37.

other host names including mail.server-trust.com, ik1-437-50783.vs.sakura.ne.jp, mail.server-trust.jp, mail.iau.gr.jp and mail.server-trust.net share IP numbers with mail.initialize.co.jp.

mail.initialize.co.jp - robtex.com