cob.jp - robtex.com
cob.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.205.52🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| NS | cob.jp ⭐ | ||||||
| A | 153.122.205.52🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| NS | dnss10.so-net.ne.jp | ||||||
| A | 210.139.255.1🇯🇵 So-net210.139.128.0/17 Sony Network Communications Inc. | ||||||
| PTR | dnss10.so-net.ne.jp | ||||||
| NS | dnss11.so-net.ne.jp | ||||||
| A | 210.139.255.17🇯🇵 So-net210.139.128.0/17 Sony Network Communications Inc. | ||||||
| PTR | dnss11.so-net.ne.jp | ||||||
| MX | mx.cob.jp ⭐ | ||||||
| A | 153.122.206.94🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| TXT | v=spf1 include:_spf.shared-server.net +mx ~all | ||||||
| SOA | cob.jphostmaster@cob.jp serial=2602171610 | ||||||
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=1778810403 | ||||||
NS for
cob.jp |
Previously MX for
cob.jp |
Same first word
Similar names
DNS History
8 records (5 active, 3 former)
●NScob.jp2015-08-13 → 2026-05-15 · 2 obs
● 2026-05-15 02:44:28
●NSdnss10.so-net.ne.jp2015-08-13 → 2026-05-15 · 2 obs
● 2026-05-15 02:44:28
●NSdnss11.so-net.ne.jp2015-08-13 → 2026-05-15 · 2 obs
● 2026-05-15 02:44:28
○MXcob.jp2015-08-13 → 2015-09-30 · 4 obs
● 2015-09-30 09:58:20
○ 2015-12-07 08:20:14
○ 2026-05-15 02:44:28
●MXmx.cob.jp2015-12-07 → 2026-05-15 · 3 obs
● 2015-12-07 08:20:14
● 2026-05-15 02:44:28
○A111.68.195.272015-08-13 → 2015-09-30 · 4 obs
● 2015-09-30 09:58:20
○ 2015-12-07 08:20:14
○ 2026-05-15 02:44:28
●A153.122.205.522026-05-13 → 2026-05-15 · 3 obs
● 2026-05-13 08:25:00
● 2026-05-15 02:44:28
○A211.13.196.1612015-12-07 → 2016-12-19 · 5 obs
● 2015-12-07 08:20:14
● 2016-12-19 12:29:42
○ 2026-05-13 08:25:00
○ 2026-05-15 02:44:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | 15 records |
| cob.jp | dnss10.so-net.ne.jp, dnss11.so-net.ne.jp | - |
✅ Authoritative Response
Server:210.139.255.17
NS records: dnss10.so-net.ne.jp, dnss11.so-net.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cob.jp (unsigned zone)
⏱️ Timing
Total: 2091ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.122.205.52 |
| NS | 2 | dnss10.so-net.ne.jp, dnss11.so-net.ne.jp |
| MX | 1 | mx.cob.jp (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.shared-server.net +m |
| SOA | 1 | cob.jp hostmaster.cob.jp |
📌 Glue Records Collected
Total: 15
In-bailiwick: 15 (a.dns.jp, a.dns.jp, b.dns.jp...)
Analysis
Name Server Role
cob.jp serves as a name server for cob.jp.
Commonly, dnss10.so-net.ne.jp and dnss11.so-net.ne.jp act as name servers along with cob.jp.
IP Addresses
cob.jp points to a single IP address: 153.122.205.52.
Other host names such as bifrostec.co.jp, achieved.co.jp, ours-inc.com, sankokogyo-inc.com and futurescape.jp share IP numbers with cob.jp.
Name Servers
cob.jp is delegated to three name servers: cob.jp, dnss10.so-net.ne.jp and dnss11.so-net.ne.jp.
At least part of the name servers for cob.jp are shared with other domains, for instance yoshichu-kk.com, atoji-photo.com, machiko.com, tsumagari.org and blueheaven-bar.com.
Host names with a single IP:
cob.jp points to: 153.122.205.52
dnss10.so-net.ne.jp points to: 210.139.255.1
dnss11.so-net.ne.jp points to: 210.139.255.17
Mail Servers
The mail server for cob.jp is mx.cob.jp.
Host mx.cob.jp points to IP 153.122.206.94.