`mail.arm91.com`

	DNSSEC	⚠️ Not signed
	A	210.140.118.20^{🇯🇵 IDC210.140.96.0/19 Frontier Inc.}

`arm91.com`

	DNSSEC	⚠️ Not signed
	A	210.140.118.20^{🇯🇵 IDC210.140.96.0/19 Frontier Inc.}
	NS	`ns2.arm91.com` ⭐ ⚠️ Not in parent delegation
	NS	`prvh2020.presinet.ne.jp`
	NS	`prvh2020.ssl0001-presinet.ne.jp`
	MX	`mail.arm91.com` ⭐
	TXT	`v=spf1 +a +mx +a:prvh2020.presinet.ne.jp -all`
	SOA	`ns2.arm91.com`info@presinet.ne.jp 2026-07-26 #2

MX for

arm91.com

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DNS History

1 record (1 active, 0 former)

●A210.140.118.202026-07-08 → 2026-08-15 · 2 obs

● 2026-07-08 07:41:20
● 2026-08-15 00:31:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
arm91.com	prvh2020.presinet.ne.jp, prvh2020.ssl0001-presinet.ne.jp	-

✅ Authoritative Response

Server:210.140.118.20

NS records: prvh2020.presinet.ne.jp, prvh2020.ssl0001-presinet.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for arm91.com (unsigned zone)

⏱️ Timing

Total: 927ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`210.140.118.20`

Analysis

Mail Server Role

mail.arm91.com serves as a mail server for arm91.com.

IP Addresses

mail.arm91.com points to a single IP number: 210.140.118.20.

Additional host names — ids-kobe.com, wata-rin.com, ns2.katayama-kensetsu.co.jp and two others — share IP numbers with mail.arm91.com.

mail.arm91.com - robtex.com

mail.arm91.com

arm91.com