open-4.com - robtex.com
open-4.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 119.245.209.176🇯🇵 InfoSphere119.245.0.0/16 INFOSPHERE | ||||||
| PTR | open-4.com | ||||||
| NS | ns3.sphere.ad.jp ⭐ | ||||||
| A | 202.239.113.22🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE | ||||||
| PTR | ns3.sphere.ad.jp | ||||||
| NS | ns4.sphere.ad.jp | ||||||
| A | 202.239.113.30🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE | ||||||
| PTR | ns4.sphere.ad.jp | ||||||
| MX | open-4.com ⭐ | ||||||
| A | 119.245.209.176🇯🇵 InfoSphere119.245.0.0/16 INFOSPHERE | ||||||
| PTR | open-4.com | ||||||
| TXT | v=spf1 include:fmx.etius.jp +ip4:119.245.209.2/32 +ip4:119.245.209.176/32 -all | ||||||
| SOA | ns3.sphere.ad.jpdns@sphere.ad.jp serial=1576034172 | ||||||
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=1776130282 | ||||||
PTR for
MX for
open-4.com |
Same first word
DNS History
4 records (4 active, 0 former)
●NSns3.sphere.ad.jp2015-07-09 → 2026-04-14 · 3 obs
● 2015-07-09 01:01:44
● 2026-04-14 01:50:30
●NSns4.sphere.ad.jp2015-07-09 → 2026-04-14 · 3 obs
● 2015-07-09 01:01:44
● 2026-04-14 01:50:30
●MXopen-4.com2015-07-09 → 2026-04-14 · 3 obs
● 2015-07-09 01:01:44
● 2026-04-14 01:50:30
●A119.245.209.1762015-07-09 → 2026-04-14 · 3 obs
● 2015-07-09 01:01:44
● 2026-04-14 01:50:30
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| open-4.com | ns3.sphere.ad.jp, ns4.sphere.ad.jp | - |
✅ Authoritative Response
Server:202.239.113.30
NS records: ns3.sphere.ad.jp, ns4.sphere.ad.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for open-4.com (unsigned zone)
⏱️ Timing
Total: 1189ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 119.245.209.176 |
| NS | 2 | ns4.sphere.ad.jp, ns3.sphere.ad.jp |
| MX | 1 | open-4.com (pri: 10) |
| TXT | 1 | v=spf1 include:fmx.etius.jp +ip4:119.245 |
| SOA | 1 | ns3.sphere.ad.jp dns.sphere.ad.jp |
Analysis
Mail Server Role
open-4.com serves as the mail server for open-4.com.
IP Addresses
open-4.com points to IP number 119.245.209.176.
Name Servers
open-4.com is delegated to two name servers: ns3.sphere.ad.jp and ns4.sphere.ad.jp.
open-4.com uses the same name server setup as other domains such as 255.138.203.in-addr.arpa, honda-geki.com, laf-k.com, dc31.test2.etius.jp and jc.st36.arena.ne.jp.
open-4.com shares name servers with other domains at least partially, for example qse.jp.
Host names with one IP number:
ns3.sphere.ad.jp points to: 202.239.113.22.
ns4.sphere.ad.jp points to: 202.239.113.30.
Mail Servers
open-4.com is handled by a single mail server, open-4.com.
open-4.com points to a single IP: 119.245.209.176.