`mail.efficient.co.jp`

CNAME	`ghs.google.com`
DNSSEC	⚠️ Not signed
A	2607:f8b0:4004:c17::79^{🇺🇸 Google2607:f8b0:4004::/48}
		PTR	`bl-in-f121.1e100.net`
A	142.251.16.121^{🇺🇸 Google142.251.16.0/24}

`efficient.co.jp`

	DNSSEC	⚠️ Not signed
	A	52.193.11.40^{🇯🇵 Amazon52.192.0.0/15 EC2 NRT prefix}
	NS	`01.dnsv.jp` ⭐
	NS	`02.dnsv.jp`
	NS	`03.dnsv.jp`
	NS	`04.dnsv.jp`
	NS	`05.dnsv.jp` ⚠️ Not in zone NS records
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
	MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
	MX	`aspmx2.googlemail.com`⁽³⁰⁾
	MX	`aspmx3.googlemail.com`⁽³⁰⁾
	MX	`aspmx4.googlemail.com`⁽³⁰⁾
	MX	`aspmx5.googlemail.com`⁽³⁰⁾
	SOA	`01.dnsv.jp`hostmaster@dnsv.jp serial=1463183558

WOT: SAFE (34/100)
WOT: SUSPICIOUS (1/100)

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DNS History

2 records (1 active, 1 former)

○A125.206.119.831970-01-01 → 1970-01-01 · 3 obs

● 1970-01-01 00:00:00
○ 2018-11-14 12:05:42
○ 2026-04-27 13:03:32

●CNAMEghs.google.com2018-11-14 → 2026-04-27 · 2 obs

● 2018-11-14 12:05:42
● 2026-04-27 13:03:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	f.dns.jp, c.dns.jp, h.dns.jp, g.dns.jp...	-
efficient.co.jp	04.dnsv.jp, 05.dnsv.jp, 01.dnsv.jp, 02.dnsv.jp...	7 records

✅ Authoritative Response

Server:157.7.35.53

NS records: 04.dnsv.jp, 05.dnsv.jp, 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 1277ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`ghs.google.com`

📌 Glue Records Collected

Total: 7

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

Analysis

IP Addresses

mail.efficient.co.jp resolves to two IP numbers: 2607:f8b0:4004:c17::79 and 142.251.16.121.

other host names including mail.mytaxman.net, czap.org, lws-admin.org.uk, dataelectronica.com and cloudkaisha.com share IP numbers with mail.efficient.co.jp.

mail.efficient.co.jp - robtex.com