`vps2.firstmail.jp`

DNSSEC	⚠️ Not signed
A	133.18.16.246^{🇯🇵 KAGOYAJAPAN133.18.0.0/16 KAGOYA Japan Inc.}
		PTR	`v133-18-16-246.vir.kagoya.net`

`firstmail.jp`

	DNSSEC	⚠️ Not signed
	A	153.127.248.127^{🇯🇵 KAGOYAJAPAN153.127.224.0/19 KAGOYA Japan Inc.}
	NS	`01.dnsv.jp` ⭐
	NS	`02.dnsv.jp`
	NS	`03.dnsv.jp`
	NS	`04.dnsv.jp`
	MX	`rs01.firstmail.jp` ⭐
	TXT	`v=spf1 +ip4:153.127.245.226 +ip4:153.127.241.15 +ip4:210.172.133.181 +ip4:210...`
	SOA	`01.dnsv.jp`hostmaster@dnsv.jp serial=1692885519

Same first word

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DNS History

1 record (1 active, 0 former)

●A133.18.16.2462015-07-15 → 2026-04-15 · 2 obs

● 2015-07-15 04:41:52
● 2026-04-15 20:57:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
firstmail.jp	01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp	7 records

✅ Authoritative Response

Server:157.7.34.53

NS records: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp, 04.dnsv.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstmail.jp (unsigned zone)

⏱️ Timing

Total: 871ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`133.18.16.246`

📌 Glue Records Collected

Total: 7

Out-of-bailiwick: 7 (01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp...)

Analysis

IP Addresses

vps2.firstmail.jp resolves to one IP number: 133.18.16.246.

Other host names, for instance mail.fstml.biz, v133-18-16-246.vir.kagoya.net and fstml.biz share IP numbers with vps2.firstmail.jp.

vps2.firstmail.jp - robtex.com