`hostmaster.koubunsha.com`

DNSSEC	⚠️ Not signed
A	202.172.28.44^{🇯🇵 DRNET202.172.24.0/21}
		PTR	`s43.coreserver.jp`

`koubunsha.com`

	DNSSEC	⚠️ Not signed
	A	202.172.28.44^{🇯🇵 DRNET202.172.24.0/21}
	NS	`ns1.value-domain.com` ⭐
	NS	`ns2.value-domain.com`
	NS	`ns3.value-domain.com` ⚠️ Not in zone NS records
	NS	`ns4.value-domain.com` ⚠️ Not in zone NS records
	NS	`ns5.value-domain.com` ⚠️ Not in zone NS records
	MX	`koubunsha.com` ⭐
	TXT	`v=spf1 ip4:202.172.28.44 ~all`
	SOA	`ns1.value-domain.com`hostmaster@koubunsha.com 2020-08-26 #18

WOT: SAFE (62/100)
WOT: SAFE (68/100)

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DNS History

1 record (1 active, 0 former)

●A202.172.28.442015-05-26 → 2026-04-27 · 2 obs

● 2015-05-26 10:47:42
● 2026-04-27 04:45:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
koubunsha.com	ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com, ns4.value-domain.com...	5 records

✅ Authoritative Response

Server:172.64.52.161

NS records: ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com, ns4.value-domain.com, ns5.value-domain.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for koubunsha.com (unsigned zone)

⏱️ Timing

Total: 446ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.172.28.44`

📌 Glue Records Collected

Total: 5

Out-of-bailiwick: 5 (ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com...)

Analysis

IP Addresses

hostmaster.koubunsha.com points to a single IP address: 202.172.28.44.

Other host names such as s43.coreserver.jp, www.jjfp.net, jjfp.net, manjun.co.jp and minorigaoka.jp share IPs with hostmaster.koubunsha.com.

hostmaster.koubunsha.com - robtex.com