koukoan.com - robtex.com

koukoan.com

DNSSEC⚠️ Not signed
A202.181.99.77🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww357.sakura.ne.jp
NSmaster.dns.ne.jp ⭐
A210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRmaster.dns.ne.jp
NSns1.dns.ne.jp
A61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRns1.dns.ne.jp
NSns2.dns.ne.jp
A133.167.21.1🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan
PTRns2.dns.ne.jp
MXkoukoan.com ⭐
A202.181.99.77🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww357.sakura.ne.jp
TXTv=spf1 a:www357.sakura.ne.jp mx ~all
SOAmaster.dns.ne.jptech@sakura.ad.jp 2025-03-08 #2

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=1774458657

MX for

koukoan.com

Subdomains

mail.koukoan.com

Same first word

koukoan.com
koukoan.co.jp

Similar names

koukaon.net
okunoka.com
kanooku.com
kokouna.fr
kokouan.net
kokouna.com
kuakoon.com
koukaon.com

DNS History

14 records (5 active, 9 former)

2008201020122014201620182020202220242026NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpdns1.ymc.ne.jpdns2.ymc.ne.jpns.namedserver.netns2.namedserver.netMXkoukoan.commail.koukoan.commx.koukoan.comA202.181.99.77114.179.216.125210.169.219.153211.13.196.161
○NSdns1.ymc.ne.jp2007-11-11 → 2015-06-08 · 4 obs
● 2007-11-11 07:18:26
● 2015-06-08 14:37:36
○ 2015-10-28 12:36:12
○ 2026-03-25 17:29:54
○NSdns2.ymc.ne.jp2007-11-11 → 2015-06-08 · 4 obs
● 2007-11-11 07:18:26
● 2015-06-08 14:37:36
○ 2015-10-28 12:36:12
○ 2026-03-25 17:29:54
●NSmaster.dns.ne.jp2017-04-08 → 2026-03-25 · 3 obs
○ 2016-09-10 09:39:00
● 2017-04-08 18:22:50
● 2026-03-25 17:29:54
○NSns.namedserver.net2015-10-28 → 2016-09-10 · 5 obs
○ 2007-11-11 07:18:26
● 2015-10-28 12:36:12
● 2016-09-10 09:39:00
○ 2017-04-08 18:22:50
○ 2026-03-25 17:29:54
●NSns1.dns.ne.jp2017-04-08 → 2026-03-25 · 3 obs
○ 2016-09-10 09:39:00
● 2017-04-08 18:22:50
● 2026-03-25 17:29:54
●NSns2.dns.ne.jp2017-04-08 → 2026-03-25 · 3 obs
○ 2016-09-10 09:39:00
● 2017-04-08 18:22:50
● 2026-03-25 17:29:54
○NSns2.namedserver.net2015-10-28 → 2016-09-10 · 5 obs
○ 2007-11-11 07:18:26
● 2015-10-28 12:36:12
● 2016-09-10 09:39:00
○ 2017-04-08 18:22:50
○ 2026-03-25 17:29:54
●MXkoukoan.com2017-04-08 → 2026-03-25 · 3 obs
○ 2016-09-10 09:39:00
● 2017-04-08 18:22:50
● 2026-03-25 17:29:54
○MXmail.koukoan.com2007-11-11 → 2015-06-08 · 4 obs
● 2007-11-11 07:18:26
● 2015-06-08 14:37:36
○ 2015-10-28 12:36:12
○ 2026-03-25 17:29:54
○MXmx.koukoan.com2015-10-28 → 2016-09-10 · 5 obs
○ 2007-11-11 07:18:26
● 2015-10-28 12:36:12
● 2016-09-10 09:39:00
○ 2017-04-08 18:22:50
○ 2026-03-25 17:29:54
○A114.179.216.1252015-06-08 → 2015-06-08 · 4 obs
○ 2007-11-11 07:18:26
● 2015-06-08 14:37:36
○ 2015-10-28 12:36:12
○ 2026-03-25 17:29:54
●A202.181.99.772017-04-08 → 2026-03-25 · 3 obs
○ 2016-09-10 09:39:00
● 2017-04-08 18:22:50
● 2026-03-25 17:29:54
○A210.169.219.1532007-11-11 → 2007-11-11 · 3 obs
● 2007-11-11 07:18:26
○ 2015-06-08 14:37:36
○ 2026-03-25 17:29:54
○A211.13.196.1612015-10-28 → 2016-09-10 · 5 obs
○ 2007-11-11 07:18:26
● 2015-10-28 12:36:12
● 2016-09-10 09:39:00
○ 2017-04-08 18:22:50
○ 2026-03-25 17:29:54

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comb.gtld-servers.net, d.gtld-servers.net, c.gtld-servers.net, j.gtld-servers.net...-
koukoan.comns1.dns.ne.jp, ns2.dns.ne.jp-

✅ Authoritative Response

Server:133.167.21.1

NS records: ns1.dns.ne.jp, ns2.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for koukoan.com (unsigned zone)

⏱️ Timing

Total: 1377ms | Queries: -

📄 Records

TypeCountSample Data
A1202.181.99.77
NS2ns1.dns.ne.jp, ns2.dns.ne.jp
MX1koukoan.com (pri: 10)
TXT1v=spf1 a:www357.sakura.ne.jp mx ~all
SOA1master.dns.ne.jp tech.sakura.ad.jp

Analysis

Hierarchy

koukoan.com is a parent of mail.koukoan.com.

Mail Server Role

koukoan.com serves as the mail server for koukoan.com.

IP Addresses

koukoan.com points to a single IP number: 202.181.99.77.

Other host names, for instance ritsu-net.com, ny-human.com, here-intl.sakura.ne.jp, nextdoor-jp.com and ryms.co.jp share IP numbers with koukoan.com.

Name Servers

The delegation for koukoan.com is handled by three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

koukoan.com at least partially shares name servers with other domains, for instance nexus-m.com, s-product.com, 60.242.133.in-addr.arpa, academate.com and tmusuko.com.

These name servers are commonly used with dns.sakura.ad.jp and ns2dns.ne.jp.

Host names with one IP number:

master.dns.ne.jp points to 210.224.172.18.

ns1.dns.ne.jp points to 61.211.236.1.

ns2.dns.ne.jp points to 133.167.21.1.

Mail Servers

A single mail server handles koukoan.com.

koukoan.com points to a single IP: 202.181.99.77.