`postmaster.mcor.co.jp`

DNSSEC	⚠️ Not signed
MX	`mx6.securemx.jp` ⭐
		A	2001:240:bb81::4:502^{🇯🇵 IIJ-AS2001:240::/32 IIJ IPv6 BLOCK ( AS2497 )}
			PTR	`mx6180a.securemx.jp`
		A	2001:240:bb81::4:503^{🇯🇵 IIJ-AS2001:240::/32 IIJ IPv6 BLOCK ( AS2497 )}
			PTR	`mx6180b.securemx.jp`
		A	2001:240:bb81::4:524^{🇯🇵 IIJ-AS2001:240::/32 IIJ IPv6 BLOCK ( AS2497 )}
			PTR	`mx6114a.securemx.jp`
		A	2001:240:bb81::4:525^{🇯🇵 IIJ-AS2001:240::/32 IIJ IPv6 BLOCK ( AS2497 )}
			PTR	`mx6114b.securemx.jp`
MX	`mx.securemx.jp`⁽²⁰⁾
		A	210.130.202.92^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx180b.securemx.jp`
		A	210.130.202.93^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx114b.securemx.jp`
		A	210.130.202.96^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx114a.securemx.jp`
		A	210.130.202.99^{🇯🇵 IIJ-AS210.130.0.0/16 IIJ IPv4 BLOCK ( AS2497 )}
			PTR	`mx180a.securemx.jp`

`mcor.co.jp`

	DNSSEC	⚠️ Not signed
	NS	`ns.mcor.co.jp` ⭐
	NS	`dns-a.iij.ad.jp`
	MX	`mx6.securemx.jp` ⭐
	MX	`mx.securemx.jp`⁽²⁰⁾
	TXT	`MS=ms48866144`
	TXT	`google-site-verification=ZbAL61qba7x6E-yxUvlhYarDwnyuQ-cyqN2Fx7Mt11g`
	TXT	`MS=ms49228260`
	TXT	`v=spf1 include:spf.securemx.jp include:spf.bmv.jp include:dococab.jp ip4:203....`
	SOA	`ns.mcor.co.jp`postmaster@mcor.co.jp 2026-03-03 #2

Same first word

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DNS History

2 records (2 active, 0 former)

●MXmx.securemx.jp2015-09-02 → 2026-04-28 · 2 obs

● 2015-09-02 11:37:14
● 2026-04-28 06:15:48

●MXmx6.securemx.jp2015-09-02 → 2026-04-28 · 2 obs

● 2015-09-02 11:37:14
● 2026-04-28 06:15:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	d.dns.jp, h.dns.jp, a.dns.jp, g.dns.jp...	-
mcor.co.jp	ns.mcor.co.jp, dns-a.iij.ad.jp	1 record

✅ Authoritative Response

Server:210.138.20.110

NS records: ns.mcor.co.jp, dns-a.iij.ad.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 1474ms | Queries: -

📄 Records

Type	Count	Sample Data
MX	2	`mx.securemx.jp (pri: 10), mx6.securemx.jp (pri: 20)`

📌 Glue Records Collected

Total: 1

In-bailiwick: 1 (ns.mcor.co.jp)

Analysis

Mail Servers

postmaster.mcor.co.jp is handled by two mail servers: mx6.securemx.jp and mx.securemx.jp.

postmaster.mcor.co.jp uses the same mail server setup as other domains, for instance okb-kcs.jp, hkmold.co.jp, yonden-seikyo.or.jp, byora.com and imamura.jp.

postmaster.mcor.co.jp shares at least partially some mail servers with other domains, for instance jibunbank.co.jp, info.bookoff.co.jp, nabco-door.co.jp, nkft.co.jp and ib.keiyobank.co.jp.

Host names with four IP numbers:

mx6.securemx.jp points to: 2001:240:bb81::4:502, 2001:240:bb81::4:503, 2001:240:bb81::4:524 and 2001:240:bb81::4:525.

mx.securemx.jp points to: 210.130.202.92, 210.130.202.93, 210.130.202.96 and 210.130.202.99.

postmaster.mcor.co.jp - robtex.com