theoryknowledge.com - robtex.com
theoryknowledge.com
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=1786100534 | ||||||
MX for
theoryknowledge.com |
Same first word
theoryknowledge.com |
DNS History
7 records (7 active, 0 former)
●NSns1.xserver.jp2026-03-08 → 2026-08-07 · 2 obs
● 2026-08-07 11:17:56
●NSns2.xserver.jp2026-03-08 → 2026-08-07 · 2 obs
● 2026-08-07 11:17:56
●NSns3.xserver.jp2026-03-08 → 2026-08-07 · 2 obs
● 2026-08-07 11:17:56
●NSns4.xserver.jp2026-03-08 → 2026-08-07 · 2 obs
● 2026-08-07 11:17:56
●NSns5.xserver.jp2026-03-08 → 2026-08-07 · 2 obs
● 2026-08-07 11:17:56
●MXtheoryknowledge.com2026-03-08 → 2026-08-07 · 2 obs
● 2026-08-07 11:17:56
●A183.181.81.212026-03-08 → 2026-08-07 · 2 obs
● 2026-08-07 11:17:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| theoryknowledge.com | ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp... | - |
✅ Authoritative Response
Server:157.112.182.220
NS records: ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp, ns4.xserver.jp, ns5.xserver.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for theoryknowledge.com (unsigned zone)
⏱️ Timing
Total: 1320ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 183.181.81.21 |
| NS | 5 | ns3.xserver.jp, ns4.xserver.jp... |
| MX | 1 | theoryknowledge.com (pri: 0) |
| TXT | 2 | google-site-verification=RWeBls9vzc3SyfB, v=spf1 +a:sv10340.xserver.jp +a:theorykn |
| SOA | 1 | ns1.xserver.jp root.xserver.jp |
Analysis
Mail Server Role
The MX record for theoryknowledge.com points back to theoryknowledge.com — it is its own mail server.
IP Addresses
theoryknowledge.com directs to one IP number, which is 183.181.81.21.
Among the host names that share IP numbers with theoryknowledge.com are agk.jp, gaprise.com, zuttoride.co.jp and two others.
Name Servers
The authoritative name servers for theoryknowledge.com are ns1.xserver.jp, ns2.xserver.jp, ns3.xserver.jp and two others.
The name servers of theoryknowledge.com overlap at least partially with those of other domains — among them tweedees.tokyo, fs-create.net, youtuber2.com and two more.
These name servers commonly appear alongside the name servers ns4.xserver.jp and ns5.xserver.jp.
Hosts with three IP address records:
ns1.xserver.jp points to 202.226.36.164, 202.226.36.170 and 202.226.36.246.
ns4.xserver.jp points to 183.90.224.226, 183.90.224.230 and 202.226.39.247.
ns5.xserver.jp points to 157.112.182.218, 157.112.182.220 and 202.226.37.247.
Hosts that resolve to one IP address:
ns2.xserver.jp points to 35.72.43.26.
ns3.xserver.jp points to 202.226.36.247.
Mail Servers
The MX record for theoryknowledge.com points to a single mail server: theoryknowledge.com.
theoryknowledge.com resolves to a single IP number: 183.181.81.21.