`mail.fields21.jp`

CNAME	`mt19.fields21.jp`
DNSSEC	⚠️ Not signed
A	153.127.84.66^{🇯🇵 SAKURA-A153.127.0.0/17 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
		PTR	`mt19.fields21.jp`

`fields21.jp`

	DNSSEC	⚠️ Not signed
	A	153.127.84.66^{🇯🇵 SAKURA-A153.127.0.0/17 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan}
	NS	`master.dns.ne.jp` ⭐
	NS	`ns1.dns.ne.jp`
	NS	`ns1.fields21.jp` ⚠️ Not in zone NS records
	NS	`ns2.dns.ne.jp`
	MX	`mail.fields21.jp` ⭐
	TXT	`v=spf1 a mx +ip4:202.243.186.9/24 +ip4:153.127.84.66/32 ~all`
	TXT	`google-site-verification=vaaUB-3S147ZLsSFUwUK7-Tdn3p5YMoiDT0WoCoL-lY`
	SOA	`master.dns.ne.jp`tech@sakura.ad.jp 2026-04-03 #2

MX for

fields21.jp

Same first word

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DNS History

2 records (1 active, 1 former)

○A202.243.186.92014-08-31 → 2026-02-16 · 4 obs

● 2014-08-31 06:52:18
● 2026-02-16 04:26:18
○ 2026-02-19 05:52:58
○ 2026-04-13 19:42:06

●CNAMEmt19.fields21.jp2014-08-31 → 2026-04-13 · 2 obs

● 2014-08-31 06:52:18
● 2026-04-13 19:42:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
fields21.jp	ns1.fields21.jp, ns2.dns.ne.jp, ns1.dns.ne.jp	3 records

✅ Authoritative Response

Server:61.211.236.1

NS records: ns1.fields21.jp, ns2.dns.ne.jp, ns1.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for fields21.jp (unsigned zone)

⏱️ Timing

Total: 3758ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`mt19.fields21.jp`

📌 Glue Records Collected

Total: 3

In-bailiwick: 1 (ns1.fields21.jp)

Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)

Analysis

Mail Server Role

The mail server for fields21.jp is mail.fields21.jp.

IP Addresses

mail.fields21.jp points to a single IP number: 153.127.84.66.

Other host names such as fields21.jp, ns2.fields21.jp and mt19.fields21.jp share IP numbers with mail.fields21.jp.

mail.fields21.jp - robtex.com

mail.fields21.jp

fields21.jp