a-head.jp - robtex.com
a-head.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.205.38🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| NS | ns2.namedserver.net ⭐ | ||||||
| A | 157.120.112.212🇯🇵 GMOHS-CL157.120.112.0/24 GMO GlobalSign Holdings K.K. | ||||||
| A | 157.120.113.212🇯🇵 GMOHS-CL157.120.113.0/24 GMO GlobalSign Holdings K.K. | ||||||
| A | 157.120.114.212🇯🇵 GMOHS-CL157.120.114.0/24 GMO GlobalSign Holdings K.K. | ||||||
| NS | ns.namedserver.net | ||||||
| A | 157.120.112.212🇯🇵 GMOHS-CL157.120.112.0/24 GMO GlobalSign Holdings K.K. | ||||||
| A | 157.120.113.212🇯🇵 GMOHS-CL157.120.113.0/24 GMO GlobalSign Holdings K.K. | ||||||
| A | 157.120.114.212🇯🇵 GMOHS-CL157.120.114.0/24 GMO GlobalSign Holdings K.K. | ||||||
| MX | mx.a-head.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 ~all | ||||||
| SOA | ns.namedserver.netroot@namedserver.net serial=2698647224 | ||||||
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=1785921303 | ||||||
Subdomains
mx.a-head.jp |
Same first word
DNS History
5 records (4 active, 1 former)
●NSns.namedserver.net2015-06-16 → 2026-08-05 · 2 obs
● 2026-08-05 09:28:28
●NSns2.namedserver.net2015-06-16 → 2026-08-05 · 2 obs
● 2026-08-05 09:28:28
●MXmx.a-head.jp2015-06-16 → 2026-08-05 · 2 obs
● 2026-08-05 09:28:28
●A153.122.205.382026-04-10 → 2026-08-05 · 3 obs
● 2026-04-10 02:09:50
● 2026-08-05 09:28:28
○A211.13.196.1542015-06-16 → 2017-04-19 · 4 obs
● 2017-04-19 06:31:56
○ 2026-04-10 02:09:50
○ 2026-08-05 09:28:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| a-head.jp | ns2.namedserver.net, ns.namedserver.net | - |
✅ Authoritative Response
Server:157.120.114.212
NS records: ns2.namedserver.net, ns.namedserver.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for a-head.jp (unsigned zone)
⏱️ Timing
Total: 1415ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.122.205.38 |
| NS | 2 | ns2.namedserver.net, ns.namedserver.net |
| MX | 1 | mx.a-head.jp (pri: 100) |
| TXT | 1 | v=spf1 include:_spf.shared-server.net ~a |
| SOA | 1 | ns.namedserver.net root.namedserver.net |
Analysis
Hierarchy
a-head.jp is the parent zone for mx.a-head.jp.
IP Addresses
a-head.jp resolves to just one IP address, 153.122.205.38.
Two other host names, along with y-r.co.jp, 4-56.jp and occyoco.com, also share IP numbers with a-head.jp.
Name Servers
a-head.jp uses two name servers for its delegation: ns2.namedserver.net and ns.namedserver.net.
a-head.jp shares its NS records with other domains, for example natural-h.net, ryuumu.jp, 161.19.122.153.in-addr.arpa and two others.
At least some of a-head.jp's name servers are also used by other domains, among them 191.95.125.211.in-addr.arpa.
Each of ns2.namedserver.net and ns.namedserver.net has three IP addresses: 157.120.112.212, 157.120.113.212 and 157.120.114.212.
Both ns2.namedserver.net and ns.namedserver.net resolve to 157.120.112.212 IP addresses each.
Both ns2.namedserver.net and ns.namedserver.net resolve to 157.120.113.212 IP addresses each.
Both ns2.namedserver.net and ns.namedserver.net resolve to 157.120.114.212 IP addresses each.
Mail Servers
The sole mail server for a-head.jp is mx.a-head.jp.
mx.a-head.jp directs to just one IP number, 153.122.206.94.