koubunsha.com - robtex.com

koubunsha.com

DNSSEC⚠️ Not signed
A202.172.28.44🇯🇵 DRNET202.172.24.0/21
PTRs43.coreserver.jp
NSns1.value-domain.com ⭐
A172.64.52.38🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.52.161🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns2.value-domain.com
A172.64.53.3🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.53.115🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns3.value-domain.com ⚠️ Not in zone NS records
A172.64.52.38🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.52.161🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns4.value-domain.com ⚠️ Not in zone NS records
A172.64.53.3🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.53.115🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns5.value-domain.com ⚠️ Not in zone NS records
A172.64.52.38🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.52.161🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
MXkoubunsha.com ⭐
A202.172.28.44🇯🇵 DRNET202.172.24.0/21
PTRs43.coreserver.jp
TXTv=spf1 ip4:202.172.28.44 ~all
SOAns1.value-domain.comhostmaster@koubunsha.com 2020-08-26 #18

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1777121396
WOT: SAFE (68/100)

MX for

koubunsha.com

Subdomains

hostmaster.koubunsha.com

Same first word

koubunsha.jp
koubunsha.com
koubunsha.net

DNS History

7 records (7 active, 0 former)

20162017201820192020202120222023202420252026NSns1.value-domain.comns2.value-domain.comns3.value-domain.comns4.value-domain.comns5.value-domain.comMXkoubunsha.comA202.172.28.44
●NSns1.value-domain.com2015-07-10 → 2026-04-25 · 2 obs
● 2015-07-10 01:13:14
● 2026-04-25 13:05:28
●NSns2.value-domain.com2015-07-10 → 2026-04-25 · 2 obs
● 2015-07-10 01:13:14
● 2026-04-25 13:05:28
●NSns3.value-domain.com2026-04-14 → 2026-04-25 · 3 obs
○ 2015-07-10 01:13:14
● 2026-04-14 00:11:06
● 2026-04-25 13:05:28
●NSns4.value-domain.com2026-04-14 → 2026-04-25 · 3 obs
○ 2015-07-10 01:13:14
● 2026-04-14 00:11:06
● 2026-04-25 13:05:28
●NSns5.value-domain.com2026-04-14 → 2026-04-25 · 3 obs
○ 2015-07-10 01:13:14
● 2026-04-14 00:11:06
● 2026-04-25 13:05:28
●MXkoubunsha.com2015-07-10 → 2026-04-25 · 2 obs
● 2015-07-10 01:13:14
● 2026-04-25 13:05:28
●A202.172.28.442015-07-10 → 2026-04-25 · 2 obs
● 2015-07-10 01:13:14
● 2026-04-25 13:05:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comk.gtld-servers.net, g.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net...-
koubunsha.comns1.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: 457ms | Queries: -

📄 Records

TypeCountSample Data
A1202.172.28.44
NS2ns2.value-domain.com, ns1.value-domain.com
MX1koubunsha.com (pri: 10)
TXT1v=spf1 ip4:202.172.28.44 ~all
SOA1ns1.value-domain.com hostmaster.koubunsh

📌 Glue Records Collected

Total: 5

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

Analysis

Hierarchy

koubunsha.com is the parent of hostmaster.koubunsha.com.

Mail Server Role

koubunsha.com is the mail server for koubunsha.com.

IP Addresses

koubunsha.com resolves to a single IP: 202.172.28.44.

Other host names, for instance spacekinds.com, kaeru-report.com, acuo.jp, mail.aaabox.com and 1st-kobo.jp share IP numbers with koubunsha.com.

Name Servers

koubunsha.com delegates to five name servers: ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com, ns4.value-domain.com and ns5.value-domain.com.

koubunsha.com shares some name servers with other domains, for example iseryuichiro.com, ace-spt.com, 176.44.163.in-addr.arpa, ai-ar.com and kunst.jp.

These name servers are often used together with ns11.value-domain.com, ns12.value-domain.com and ns13.value-domain.com.

Host names with two IP numbers:

The host ns1.value-domain.com points to 172.64.52.38 and 172.64.52.161.

The host ns2.value-domain.com points to 172.64.53.3 and 172.64.53.115.

The host ns3.value-domain.com points to 172.64.52.38 and 172.64.52.161.

The host ns4.value-domain.com points to 172.64.53.3 and 172.64.53.115.

The host ns5.value-domain.com points to 172.64.52.38 and 172.64.52.161.

Hosts pointing to 172.64.52.38: ns1.value-domain.com, ns3.value-domain.com and ns5.value-domain.com.

Hosts pointing to 172.64.52.161: ns1.value-domain.com, ns3.value-domain.com and ns5.value-domain.com.

Hosts pointing to 172.64.53.3: ns2.value-domain.com and ns4.value-domain.com.

Hosts pointing to 172.64.53.115: ns2.value-domain.com and ns4.value-domain.com.

Mail Servers

One mail server handles koubunsha.com.

Host name koubunsha.com points to IP 202.172.28.44.