kos-c.jp - robtex.com
kos-c.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 219.94.163.188🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1548.sakura.ne.jp | ||||||
| NS | master.dns.ne.jp ⭐ | ||||||
| A | 210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | master.dns.ne.jp | ||||||
| NS | ns1.dns.ne.jp | ||||||
| A | 61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | ns1.dns.ne.jp | ||||||
| NS | ns2.dns.ne.jp | ||||||
| A | 133.167.21.1🇯🇵 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 | ||||||
| PTR | ns2.dns.ne.jp | ||||||
| MX | kos-c.jp ⭐ | ||||||
| A | 219.94.163.188🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1548.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www1548.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2026-01-06 #2 | ||||||
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1774655102 | ||||||
MX for
kos-c.jp |
Subdomains
Same first word
kos-c.jp |
Similar names
sc-ok.com |
so-ck.com |
oc-ks.com |
sc-ko.hk |
co-ks.com |
so-kc.net |
sk-co.biz |
sok-c.com |
kc-os.co.kr |
k-sco.com |
sk-co.co.kr |
ok-sc.com |
ks-co.jp |
ok-cs.com |
ks-co.com |
c-sko.ru |
sk-co.com |
sk-co.jp |
DNS History
16 records (5 active, 11 former)
○NS01.dnsv.jp2015-08-24 → 2016-06-27 · 4 obs
● 2016-06-27 14:29:24
○ 2016-12-19 18:46:36
○ 2026-03-28 00:09:18
○NS02.dnsv.jp2015-08-24 → 2016-06-27 · 4 obs
● 2016-06-27 14:29:24
○ 2016-12-19 18:46:36
○ 2026-03-28 00:09:18
○NS03.dnsv.jp2015-08-24 → 2016-06-27 · 4 obs
● 2016-06-27 14:29:24
○ 2016-12-19 18:46:36
○ 2026-03-28 00:09:18
○NS04.dnsv.jp2015-08-24 → 2016-06-27 · 4 obs
● 2016-06-27 14:29:24
○ 2016-12-19 18:46:36
○ 2026-03-28 00:09:18
●NSmaster.dns.ne.jp2026-03-09 → 2026-03-28 · 3 obs
● 2026-03-09 16:56:36
● 2026-03-28 00:09:18
○NSns-1474.awsdns-56.org2016-12-19 → 2017-06-26 · 5 obs
● 2016-12-19 18:46:36
● 2017-06-26 22:37:24
○ 2026-03-09 16:56:36
○ 2026-03-28 00:09:18
○NSns-1776.awsdns-30.co.uk2016-12-19 → 2017-06-26 · 5 obs
● 2016-12-19 18:46:36
● 2017-06-26 22:37:24
○ 2026-03-09 16:56:36
○ 2026-03-28 00:09:18
○NSns-448.awsdns-56.com2016-12-19 → 2017-06-26 · 5 obs
● 2016-12-19 18:46:36
● 2017-06-26 22:37:24
○ 2026-03-09 16:56:36
○ 2026-03-28 00:09:18
○NSns-949.awsdns-54.net2016-12-19 → 2017-06-26 · 5 obs
● 2016-12-19 18:46:36
● 2017-06-26 22:37:24
○ 2026-03-09 16:56:36
○ 2026-03-28 00:09:18
●NSns1.dns.ne.jp2026-03-09 → 2026-03-28 · 3 obs
● 2026-03-09 16:56:36
● 2026-03-28 00:09:18
●NSns2.dns.ne.jp2026-03-09 → 2026-03-28 · 3 obs
● 2026-03-09 16:56:36
● 2026-03-28 00:09:18
●MXkos-c.jp2026-03-09 → 2026-03-28 · 3 obs
● 2026-03-09 16:56:36
● 2026-03-28 00:09:18
○MXmail.kos-c.jp2015-08-24 → 2017-06-26 · 4 obs
● 2017-06-26 22:37:24
○ 2026-03-09 16:56:36
○ 2026-03-28 00:09:18
○A210.140.88.1502017-06-26 → 2017-06-26 · 4 obs
● 2017-06-26 22:37:24
○ 2026-03-09 16:56:36
○ 2026-03-28 00:09:18
○A210.168.60.1352015-08-24 → 2017-01-14 · 4 obs
● 2017-01-14 13:48:28
○ 2017-06-26 22:37:24
○ 2026-03-28 00:09:18
●A219.94.163.1882026-03-09 → 2026-03-28 · 3 obs
● 2026-03-09 16:56:36
● 2026-03-28 00:09:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| kos-c.jp | ns2.dns.ne.jp, ns1.dns.ne.jp | 2 records |
✅ Authoritative Response
Server:133.167.21.1
NS records: ns2.dns.ne.jp, ns1.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for kos-c.jp (unsigned zone)
⏱️ Timing
Total: 782ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 219.94.163.188 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | kos-c.jp (pri: 10) |
| TXT | 1 | v=spf1 a:www1548.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)
Analysis
Hierarchy
kos-c.jp is a parent of www.kos-c.jp and mail.kos-c.jp.
Mail Server Role
kos-c.jp serves as the mail server for kos-c.jp.
IP Addresses
kos-c.jp points to a single IP number: 219.94.163.188.
Other host names, for instance inclu.jp, maru-ok.com, sartc.jp, qranoko.sakura.ne.jp and komati.jp share IP numbers with kos-c.jp.
Name Servers
The delegation for kos-c.jp is handled by three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
kos-c.jp at least partially shares name servers with other domains, for instance gzet.co.jp, solidcable.com, arix.jp, kileito.com and coteefar.com.
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 kos-c.jp.
kos-c.jp points to a single IP: 219.94.163.188.