`test.customworld.jp`

DNSSEC	⚠️ Not signed
A	210.188.224.9^{🇯🇵 SAKURA-B210.188.224.0/19 (3/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
		PTR	`ns1.sakura.ad.jp`

`customworld.jp`

	DNSSEC	⚠️ Not signed
	NS	`customworld.jp` ⭐
	NS	`dns01.muumuu-domain.com`
	NS	`dns02.muumuu-domain.com`
	MX	`customworld-jp.mail.protection.outlook.com` ⭐
	MX	`test.customworld.jp`⁽¹⁰⁰⁾
	TXT	`v=spf1 ip4:112.78.125.24 include:spf.protection.outlook.com include:spf.bmv.j...`
	TXT	`MS=ms61189077`
	SOA	`customworld.jp`postmaster@customworld.jp serial=1762490303

MX for

customworld.jp

Same first word

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DNS History

1 record (1 active, 0 former)

●A210.188.224.92026-04-12 → 2026-04-12 · 2 obs

● 2026-04-12 05:28:52
● 2026-04-12 21:18:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
customworld.jp	dns01.muumuu-domain.com, dns02.muumuu-domain.com	-

✅ Authoritative Response

Server:160.251.249.62

NS records: dns01.muumuu-domain.com, dns02.muumuu-domain.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for customworld.jp (unsigned zone)

⏱️ Timing

Total: 1344ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`210.188.224.9`

Analysis

Mail Server Role

The mail server for customworld.jp is test.customworld.jp.

For mail handling, customworld-jp.mail.protection.outlook.com serves as a mail server together with test.customworld.jp.

IP Addresses

test.customworld.jp points to a single IP number: 210.188.224.9.

Other host names, for instance mail.oishi-japan.de, ns2.cvsecurity.jp, ns1.sakura.ad.jp, kirarisc.com and atopic-sapporo.net share IP numbers with test.customworld.jp.

test.customworld.jp - robtex.com