`mail.4est.jp`

DNSSEC	⚠️ Not signed
A	153.125.146.42^{🇯🇵 SAKURA-A153.125.128.0/18 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
		PTR	`4est.jp`

`4est.jp`

	DNSSEC	⚠️ Not signed
	A	153.125.146.42^{🇯🇵 SAKURA-A153.125.128.0/18 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
	NS	`ns1.4est.jp` ⭐
	NS	`ns2.4est.jp`
	MX	`mail.4est.jp` ⭐
	TXT	`google-site-verification=sIg94TUke_WH4cm4e0DlEUrKi88SBz2qxaz0C4SPmEc`
	TXT	`v=spf1 +a +mx +a:quo-s.net -all`
	SOA	`ns1.4est.jp`quo4est+plesk@gmail.com 2026-03-18 #7

MX for

4est.jp

Same first word

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DNS History

4 records (1 active, 3 former)

○A110.50.246.1472015-05-21 → 2016-08-14 · 5 obs

○ 2009-01-28 02:46:48
● 2015-05-21 21:39:34
● 2016-08-14 15:51:22
○ 2016-12-19 09:02:10
○ 2026-04-14 15:58:24

●A153.125.146.422026-03-31 → 2026-04-14 · 3 obs

○ 2016-12-20 16:27:24
● 2026-03-31 18:31:00
● 2026-04-14 15:58:24

○A202.45.166.2192009-01-28 → 2009-01-28 · 3 obs

● 2009-01-28 02:46:48
○ 2015-05-21 21:39:34
○ 2026-04-14 15:58:24

○A202.45.166.622016-12-19 → 2016-12-20 · 5 obs

○ 2016-08-14 15:51:22
● 2016-12-19 09:02:10
● 2016-12-20 16:27:24
○ 2026-03-31 18:31:00
○ 2026-04-14 15:58:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	f.dns.jp, d.dns.jp, a.dns.jp, e.dns.jp...	-
4est.jp	ns1.4est.jp, ns2.4est.jp	2 records

✅ Authoritative Response

Server:153.125.146.42

NS records: ns1.4est.jp, ns2.4est.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 4est.jp (unsigned zone)

⏱️ Timing

Total: 867ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`153.125.146.42`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns1.4est.jp, ns2.4est.jp)

Analysis

Mail Server Role

mail.4est.jp acts as a mail server for 4est.jp.

IP Addresses

mail.4est.jp points to a single IP number: 153.125.146.42.

Other host names, for instance yuzum.com, ns1.as-u.net, ns1.4est.jp, ns2.yuzum.com and ns2.4est.jp share IP numbers with mail.4est.jp.

mail.4est.jp - robtex.com

mail.4est.jp

4est.jp