kosaiji.org - robtex.com
kosaiji.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 49.212.235.89🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3379.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 | kosaiji.org ⭐ | ||||||
| A | 49.212.235.89🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www3379.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www3379.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2026-01-23 #1 | ||||||
org
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1784445647 | ||||||
MX for
kosaiji.org |
Same first word
kosaiji.org |
Similar names
DNS History
5 records (5 active, 0 former)
●MXkosaiji.org2015-07-06 → 2026-07-19 · 2 obs
● 2026-07-19 07:36:30
●A49.212.235.892015-07-06 → 2026-07-19 · 2 obs
● 2026-07-19 07:36:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org | - |
| kosaiji.org | ns1.dns.ne.jp, ns2.dns.ne.jp | - |
✅ Authoritative Response
Server:61.211.236.1
NS records: ns1.dns.ne.jp, ns2.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for kosaiji.org (unsigned zone)
⏱️ Timing
Total: 1336ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 49.212.235.89 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | kosaiji.org (pri: 10) |
| TXT | 1 | v=spf1 a:www3379.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
Analysis
Mail Server Role
kosaiji.org handles its own mail, functioning as its own mail server.
IP Addresses
kosaiji.org resolves to just one IP address, 49.212.235.89.
Two other host names, along with ai-eng.co.jp, aert-rc.com and sanno-uda.jp, also share IP numbers with kosaiji.org.
Name Servers
kosaiji.org is served by three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
kosaiji.org partially shares its NS delegation with several other domains, including jasso-kokusai-festival2026.jp, ichokai.sakura.ne.jp, www.sanyogas.co.jp and two others.
These name servers often co-occur with the name servers dns.sakura.ad.jp.
master.dns.ne.jp has IP address 210.224.172.18, ns1.dns.ne.jp has IP address 61.211.236.1 and ns2.dns.ne.jp has IP address 133.167.21.1 — one address each.
Mail Servers
kosaiji.org is served by just one mail server: kosaiji.org.
kosaiji.org resolves to 49.212.235.89 and no other IP number.