`mx21.4xtf.jp`

DNSSEC	⚠️ Not signed
A	2001:dc2:1000:2004::221^{🇯🇵 ASN-JPNIC2001:dc2::/32 JPNICNET}
		PTR	`mx21.nic.ad.jp`
A	202.12.30.33^{🇯🇵 ASN-JPNIC202.12.30.0/24 JPNICNET Japan Network Information Center Uchikanda OS Bldg. 4F 2-12-6 Uchi-Kanda Chiyoda-ku, Tokyo 101-0047 JAPAN}

`4xtf.jp`

	DNSSEC	⚠️ Not signed
	A	2001:dc2:1000:2008::5456^{🇯🇵 ASN-JPNIC2001:dc2::/32 JPNICNET}
	A	192.41.192.178^{🇯🇵 ASN-JPNIC192.41.192.0/24 JPNICNET Japan Network Information Center Uchikanda OS Bldg. 4F 2-12-6 Uchi-Kanda Chiyoda-ku, Tokyo 101-0047 JAPAN}
	NS	`ns3.4xtf.jp` ⭐
	NS	`ns5.4xtf.jp`
	MX	`mx21.4xtf.jp` ⭐
	MX	`mx22.4xtf.jp`⁽²⁰⁾
	SOA	`ns3.4xtf.jp`hostmaster@nic.ad.jp 2024-09-02 #0

MX for

4xtf.jp

Same first word

mx21.net

Similar names

21xm.com

21mx.de

12mx.cn

21xm.cn

1mx2.com

mx12.com

x12m.com

DNS History

2 records (2 active, 0 former)

●A2001:dc2:1000:2004::2212026-03-04 → 2026-03-25 · 2 obs

● 2026-03-04 15:27:38
● 2026-03-25 21:55:12

●A202.12.30.332026-03-04 → 2026-03-25 · 2 obs

● 2026-03-04 15:27:38
● 2026-03-25 21:55:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
4xtf.jp	ns5.4xtf.jp, ns3.4xtf.jp	3 records

✅ Authoritative Response

Server:202.12.30.225

NS records: ns5.4xtf.jp, ns3.4xtf.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 4xtf.jp (unsigned zone)

⏱️ Timing

Total: 1768ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.12.30.33`
AAAA	1	`2001:dc2:1000:2004::221`

📌 Glue Records Collected

Total: 3

In-bailiwick: 3 (ns3.4xtf.jp, ns5.4xtf.jp, ns5.4xtf.jp)

Analysis

Mail Server Role

mx21.4xtf.jp serves as the mail server for 4xtf.jp.

mx22.4xtf.jp commonly serves as a mail server along with mx21.4xtf.jp.

IP Addresses

Two IP numbers are pointed to by mx21.4xtf.jp: 2001:dc2:1000:2004::221 and 202.12.30.33.

other host names include mx21.japanigf.jp, mx21.jdna.jp, mx21.nic.ad.jp, mx21.kokatsu.jp and mx21.igcj.jp; they share IP numbers with mx21.4xtf.jp.

mx21.4xtf.jp - robtex.com

mx21.4xtf.jp

4xtf.jp