knowledgebuilder.com - dns.ninja
knowledgebuilder.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | level3f.si2.com ⭐ | ||||||
| A | 209.246.137.52🇺🇸 AS3356209.244.0.0/14 | ||||||
| PTR | level3f.si2l3.com | ||||||
| NS | level3c.si2.com | ||||||
| A | 66.196.209.115🇺🇸 LOGIX-166.196.208.0/21 Dallas | ||||||
| PTR | 115.209.196.66.in-addr.arpa | ||||||
| MX | server50.appriver.com ⭐ | ||||||
| A | 8.31.233.106🇺🇸 APPRI-18.31.233.0/24 AppRiver, LLC 1101 Gulf Breeze Parkway Gulf Breeze, FL 32561 US | ||||||
| PTR | server268.appriver.com | ||||||
| MX | server51.appriver.com(30) | ||||||
| A | 8.31.233.107🇺🇸 APPRI-18.31.233.0/24 AppRiver, LLC 1101 Gulf Breeze Parkway Gulf Breeze, FL 32561 US | ||||||
| PTR | server269.appriver.com | ||||||
| SOA | level3f.si2.comadministrator@si2.com serial=16 | ||||||
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=1782284770 | ||||||
Same first word
knowledgebuilder.net |
knowledgebuilder.info |
knowledgebuilder.com |
DNS History
4 records (4 active, 0 former)
●MXserver50.appriver.com2015-08-09 → 2026-06-24 · 2 obs
● 2026-06-24 07:15:02
●MXserver51.appriver.com2015-08-09 → 2026-06-24 · 2 obs
● 2026-06-24 07:15:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | d.gtld-servers.net, k.gtld-servers.net, g.gtld-servers.net, c.gtld-servers.net... | - |
| knowledgebuilder.com | level3f.si2.com, level3c.si2.com | 2 records |
✅ Authoritative Response
Server:209.246.137.52
NS records: level3f.si2.com, level3c.si2.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for knowledgebuilder.com (unsigned zone)
⏱️ Timing
Total: 3135ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | level3f.si2.com, level3c.si2.com |
| MX | 2 | server50.appriver.com (pri: 10), server51.appriver.com (pri: 30) |
| SOA | 1 | level3f.si2.com administrator.si2.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (level3f.si2.com, level3c.si2.com)
Analysis
Name Servers
The NS records for knowledgebuilder.com delegate to level3c.si2.com and level3f.si2.com.
knowledgebuilder.com shares its NS records with other domains, for example 137.246.209.in-addr.arpa, koss.wtf, koss.com.sg and two others.
level3c.si2.com directs to 66.196.209.115 and level3f.si2.com directs to 209.246.137.52; each host name points to exactly one IP number.
Mail Servers
knowledgebuilder.com is served by two mail servers, server50.appriver.com and server51.appriver.com.
Among the domains sharing a mail server setup with knowledgebuilder.com are tavss.com, equicor.com, exchange.rackspace.com and two others.
knowledgebuilder.com partially shares its mail servers with other domains; known examples include countrychildrenscenter.org, couchusa.com and ushelo.com.
These mail servers tend to appear in combination with mail servers f2sgrfwkcul54ld2sr3oblngdw62rsp5rndna72lutfsel66p6fa.mx-verification.google.com, mx1.cemex.com, mx3.cemex.com and 5 others.
server50.appriver.com directs to 8.31.233.106 and server51.appriver.com directs to 8.31.233.107; each host name points to exactly one IP number.