a-open.co.jp - robtex.com
a-open.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 210.131.236.210🇯🇵 GMOOSK-NET210.131.236.0/24 GMO Internet Group, Inc. Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | www12.gmoserver.jp | ||||||
| NS | dns01.gmoserver.jp ⭐ | ||||||
| A | 157.7.33.81🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | dns01.gmoserver.jp | ||||||
| NS | dns02.gmoserver.jp | ||||||
| A | 157.7.34.81🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | dns02.gmoserver.jp | ||||||
| MX | mx12.gmoserver.jp ⭐ | ||||||
| A | 210.131.236.213🇯🇵 GMOOSK-NET210.131.236.0/24 GMO Internet Group, Inc. Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| PTR | mx12.gmoserver.jp | ||||||
| TXT | v=spf1 include:spf12.gmoserver.jp ~all | ||||||
| SOA | dns01.gmoserver.jphostmaster@a-open.co.jp 2021-11-28 #4 | ||||||
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
Subdomains
www.a-open.co.jp |
Same first word
Similar names
e-pano.net |
apo-en.de |
open-a.ir |
a-onep.com |
ap-one.de |
ao-pen.com |
ano-pe.ru |
e-pano.com |
open-a.co.jp |
noe-ap.com |
pa-one.com |
one-ap.com |
open-a.com |
one-ap.info |
DNS History
5 records (4 active, 1 former)
●NSdns01.gmoserver.jp2018-09-17 → 2026-07-24 · 2 obs
● 2026-07-24 01:29:04
●NSdns02.gmoserver.jp2018-09-17 → 2026-07-24 · 2 obs
● 2026-07-24 01:29:04
●MXmx12.gmoserver.jp2018-09-17 → 2026-07-24 · 2 obs
● 2026-07-24 01:29:04
○A157.7.218.1762018-09-17 → 2018-09-17 · 3 obs
○ 2026-05-11 17:36:24
○ 2026-07-24 01:29:04
●A210.131.236.2102026-05-11 → 2026-07-24 · 3 obs
● 2026-05-11 17:36:24
● 2026-07-24 01:29:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| a-open.co.jp | dns01.gmoserver.jp, dns02.gmoserver.jp | - |
✅ Authoritative Response
Server:157.7.33.81
NS records: dns01.gmoserver.jp, dns02.gmoserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for a-open.co.jp (unsigned zone)
⏱️ Timing
Total: 1533ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 210.131.236.210 |
| NS | 2 | dns01.gmoserver.jp, dns02.gmoserver.jp |
| MX | 1 | mx12.gmoserver.jp (pri: 10) |
| TXT | 1 | v=spf1 include:spf12.gmoserver.jp ~all |
| SOA | 1 | dns01.gmoserver.jp hostmaster.a-open.co. |
Analysis
Hierarchy
a-open.co.jp is a parent domain of www.a-open.co.jp.
IP Addresses
a-open.co.jp directs to one IP number, which is 210.131.236.210.
Among the host names that share IP numbers with a-open.co.jp are l-bank.co.jp, dr-a2.com, raclette.jp and two others.
Name Servers
a-open.co.jp uses two name servers for its delegation: dns01.gmoserver.jp and dns02.gmoserver.jp.
a-open.co.jp has the same name server delegation as a number of other domains, such as ta-ku.jp, ec-shineshop.com, zerox.jp and two more.
At least some of a-open.co.jp's name servers are also used by other domains, among them link-sp.com.
dns01.gmoserver.jp and dns02.gmoserver.jp each resolve to one IP number: dns01.gmoserver.jp points to 157.7.33.81 and dns02.gmoserver.jp points to 157.7.34.81.
Mail Servers
a-open.co.jp routes its mail through a single mail server, mx12.gmoserver.jp.
a-open.co.jp has the same mail server arrangement as a number of other domains, for example acs21.com, tbbt.or.jp, kpla.info and two more.
At least some of a-open.co.jp's mail servers are shared with other domains, among them e-printservice.net, share-re.co.jp and kokikobo.co.jp.
mx12.gmoserver.jp directs to just one IP number, 210.131.236.213.