`mx.isas.ac.jp`

	DNSSEC	⚠️ Not signed
	A	133.56.0.8^{🇯🇵 JAXAnet133.56.0.0/16 JAXA}

`isas.ac.jp`

	DNSSEC	⚠️ Not signed
	NS	`madrid.eng.isas.ac.jp` ⭐
	NS	`dns-x.sinet.ad.jp`
	NS	`ns1.isas.ac.jp`
	NS	`ns2.isas.ac.jp`
	MX	`tkes51.tksc.jaxa.jp` ⭐
	MX	`tkes52.tksc.jaxa.jp`⁽¹⁰⁾
	TXT	`v=spf1 include:mgw.jaxa.jp include:spf.securemx.jp include:smp.ne.jp +ip4:128...`
	SOA	`madrid.eng.isas.ac.jp`hostmaster@isas.ac.jp 2026-04-30 #0

WOT: SAFE (71/100)
rank #193287 globally
rank #2839 in the tld
WOT: SAFE (80/100)
📈 Tranco rank: #287,458

MX for

www.vsop.isas.ac.jp

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DNS History

1 record (1 active, 0 former)

●A133.56.0.82014-12-30 → 2026-05-09 · 2 obs

● 2014-12-30 14:06:18
● 2026-05-09 22:28:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	g.dns.jp, h.dns.jp, a.dns.jp, e.dns.jp...	-
isas.ac.jp	ns1.isas.ac.jp, dns-x.sinet.ad.jp, ns2.isas.ac.jp	2 records

✅ Authoritative Response

Server:133.74.10.6

NS records: ns1.isas.ac.jp, dns-x.sinet.ad.jp, ns2.isas.ac.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for isas.ac.jp (unsigned zone)

⏱️ Timing

Total: 797ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`133.56.0.8`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns2.isas.ac.jp, ns1.isas.ac.jp)

Analysis

Mail Server Role

mx.isas.ac.jp serves as the mail server for www.vsop.isas.ac.jp.

IP Addresses

mx.isas.ac.jp points to a single IP address: 133.56.0.8.

Other host names, for instance mx.isas.jaxa.jp, share IP numbers with mx.isas.ac.jp.

mx.isas.ac.jp - robtex.com

mx.isas.ac.jp

isas.ac.jp