ko-a.com - robtex.com
ko-a.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 211.10.132.91🇯🇵 KDDI211.10.128.0/17 -P | ||||||
| PTR | biz-line02.idc-japan.net | ||||||
| NS | biz-line02.ko-a.com ⭐ ⚠️ Not in parent delegation | ||||||
| A | 211.10.132.91🇯🇵 KDDI211.10.128.0/17 -P | ||||||
| PTR | biz-line02.idc-japan.net | ||||||
| NS | dns2.idc-japan.net ⚠️ Not in zone NS records | ||||||
| A | 35.76.97.190🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix | ||||||
| PTR | me-sun.nedia.ne.jp | ||||||
| NS | dns3.idc-japan.net ⚠️ Not in zone NS records | ||||||
| A | 211.10.132.91🇯🇵 KDDI211.10.128.0/17 -P | ||||||
| PTR | biz-line02.idc-japan.net | ||||||
| MX | mail.ko-a.com ⭐ | ||||||
| A | 211.10.132.91🇯🇵 KDDI211.10.128.0/17 -P | ||||||
| PTR | biz-line02.idc-japan.net | ||||||
| TXT | v=spf1 ip4:211.10.131.0/24 ip4:211.10.132.0/24 ~all | ||||||
| SOA | biz-line02.ko-a.comroot@ko-a.com 2024-01-31 #0 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1778806386 | ||||||
Subdomains
mail.ko-a.com |
biz-line02.ko-a.com |
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSbiz-line02.ko-a.com2015-06-13 → 2026-05-15 · 2 obs
● 2026-05-15 00:58:36
●NSdns2.idc-japan.net2026-04-11 → 2026-05-15 · 3 obs
● 2026-04-11 00:10:48
● 2026-05-15 00:58:36
●NSdns3.idc-japan.net2026-04-11 → 2026-05-15 · 3 obs
● 2026-04-11 00:10:48
● 2026-05-15 00:58:36
●MXmail.ko-a.com2015-06-13 → 2026-05-15 · 2 obs
● 2026-05-15 00:58:36
●A211.10.132.912015-06-13 → 2026-05-15 · 2 obs
● 2026-05-15 00:58:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | h.gtld-servers.net, a.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net... | - |
| ko-a.com | dns2.idc-japan.net, dns3.idc-japan.net | - |
✅ Authoritative Response
Server:35.76.97.190
NS records: dns2.idc-japan.net, dns3.idc-japan.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ko-a.com (unsigned zone)
⏱️ Timing
Total: 1146ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 211.10.132.91 |
| NS | 1 | biz-line02.ko-a.com |
| MX | 1 | mail.ko-a.com (pri: 10) |
| TXT | 1 | v=spf1 ip4:211.10.131.0/24 ip4:211.10.13 |
| SOA | 1 | biz-line02.ko-a.com root.ko-a.com |
Analysis
Hierarchy
ko-a.com is a parent of mail.ko-a.com and biz-line02.ko-a.com.
IP Addresses
ko-a.com points to a single IP: 211.10.132.91.
Other host names, for instance mail.kiryu-kougyo.co.jp, bbms.jp, mail.ko-a.com, kyodo-exp.com and mail.k-next.com share IP numbers with ko-a.com.
Name Servers
ko-a.com is delegated to three name servers: biz-line02.ko-a.com, dns2.idc-japan.net and dns3.idc-japan.net.
ko-a.com partially shares name servers with other domains; examples include smartwax.jp, tabata-kk.co.jp, amip.co.jp, a5s.jp and sunaga-ss.co.jp.
These name servers are commonly used alongside dns1.idc-japan.net, dns4.idc-japan.net, dns5.idc-japan.net, dns6.idc-japan.net, dns1.nailgate.jp, dns01r.idc-japan.net, me-sun.nedia.ne.jp, ns1.tabata-kk.co.jp, ns2.tabata-kk.co.jp and dns1.a5s.jp.
Host names with a single IP number
Host biz-line02.ko-a.com points to 211.10.132.91
Host dns2.idc-japan.net points to 35.76.97.190
Host dns3.idc-japan.net points to 211.10.132.91
Host names pointing to 211.10.132.91: biz-line02.ko-a.com and dns3.idc-japan.net
Mail Servers
ko-a.com is handled by a single mail server, mail.ko-a.com.
mail.ko-a.com points to a single IP: 211.10.132.91.