knowledge21.com - dns.ninja
knowledge21.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=1785543352 | ||||||
Same first word
knowledge21.com |
Similar names
DNS History
14 records (8 active, 6 former)
●NSpaityn.ns.cloudflare.com2026-02-15 → 2026-08-01 · 3 obs
● 2026-02-15 19:10:52
● 2026-08-01 00:34:20
●NSricardo.ns.cloudflare.com2026-02-15 → 2026-08-01 · 3 obs
● 2026-02-15 19:10:52
● 2026-08-01 00:34:20
○NSuk2net.com2015-05-28 → 2017-10-07 · 5 obs
● 2015-05-28 17:51:30
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-08-01 00:34:20
○NSultra103.uk2.net2007-08-16 → 2017-10-07 · 4 obs
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-08-01 00:34:20
○NSultra104.uk2.net2007-08-16 → 2017-10-07 · 4 obs
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-08-01 00:34:20
●MXalt1.aspmx.l.google.com2017-10-07 → 2026-08-01 · 3 obs
● 2017-10-07 23:11:48
● 2026-08-01 00:34:20
●MXalt2.aspmx.l.google.com2017-10-07 → 2026-08-01 · 3 obs
● 2017-10-07 23:11:48
● 2026-08-01 00:34:20
●MXaspmx.l.google.com2017-10-07 → 2026-08-01 · 3 obs
● 2017-10-07 23:11:48
● 2026-08-01 00:34:20
●MXaspmx2.googlemail.com2017-10-07 → 2026-08-01 · 3 obs
● 2017-10-07 23:11:48
● 2026-08-01 00:34:20
●MXaspmx3.googlemail.com2017-10-07 → 2026-08-01 · 3 obs
● 2017-10-07 23:11:48
● 2026-08-01 00:34:20
○MXuk2mxarray3.uk2.net2007-08-16 → 2016-12-31 · 4 obs
● 2016-12-31 07:01:14
○ 2017-10-07 23:11:48
○ 2026-08-01 00:34:20
●A195.200.2.1502026-02-15 → 2026-08-01 · 3 obs
● 2026-02-15 19:10:52
● 2026-08-01 00:34:20
○A23.92.28.1522017-10-07 → 2017-10-07 · 4 obs
● 2017-10-07 23:11:48
○ 2026-02-15 19:10:52
○ 2026-08-01 00:34:20
○A83.170.69.532007-08-16 → 2016-12-31 · 4 obs
● 2016-12-31 07:01:14
○ 2017-10-07 23:11:48
○ 2026-08-01 00:34:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| knowledge21.com | paityn.ns.cloudflare.com, ricardo.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.194.18
NS records: paityn.ns.cloudflare.com, ricardo.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for knowledge21.com (unsigned zone)
⏱️ Timing
Total: 197ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 195.200.2.150 |
| NS | 2 | paityn.ns.cloudflare.com, ricardo.ns.cloudflare.com |
| MX | 5 | aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)... |
| TXT | 7 | 8161463, ZOOM_verify_pp-R8xWwS2yNFEJK-Z1ihg... |
| SOA | 1 | paityn.ns.cloudflare.com dns.cloudflare. |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (paityn.ns.cloudflare.com, paityn.ns.cloudflare.com, paityn.ns.cloudflare.com...)
Analysis
IP Addresses
knowledge21.com resolves to just one IP address, 195.200.2.150.
Other host names, among them srv539973.hstgr.cloud and k21.com.br, have IP numbers in common with knowledge21.com.
Name Servers
The NS records for knowledge21.com delegate to paityn.ns.cloudflare.com and ricardo.ns.cloudflare.com.
knowledge21.com shares its NS records with other domains, for example hack.bible, ipuc.app, manageengine.se and two others.
At least some of knowledge21.com's name servers are shared with other domains, for example l2eternity.com, privacy-registry.com, gammaedgemedia.click and two more.
It is common for these name servers to be used in conjunction with the name servers ajay.ns.cloudflare.com, mia.ns.cloudflare.com and sergi.ns.cloudflare.com.
DNS names with 6 IP addresses:
paityn.ns.cloudflare.com maps to 108.162.194.18, 162.159.38.18, 172.64.34.18 and 3 additional IP addresses.
ricardo.ns.cloudflare.com maps to 108.162.195.211, 162.159.44.211, 172.64.35.211 and 3 additional IP addresses.
Mail Servers
Five mail servers handle knowledge21.com: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com and two others.
There is at least a partial MX overlap between knowledge21.com and other domains, including ns500734.ns500699.ns500693.ns500734.ns500693.ns500699.ns500588.ns500693.ns500699.ns500632.ns500632.ns500588.ns500588.ns500602.ns500578.ns500110.dtrkdll.com, ns500699.ns500693.ns500734.ns500699.ns500699.ns500734.ns500734.ns500612.ns500632.ns500588.ns500632.dtrkdll.com, ns500742.ns500671.ns500742.ns500754.ns500731.ns500671.ns500671.ns500704.ns500688.ns500649.ns500649.ns500666.ns500142.lusty(0x736c7574)z.com and two others.
These mail servers tend to appear in combination with mail servers alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 3 others.
Host names that have two IP addresses:
The A records for aspmx2.googlemail.com return 108.177.123.27 and 2800:3f0:4003:c0f::1b.
The A records for aspmx3.googlemail.com return 172.253.116.26 and 2a00:1450:400b:c02::1a.
The A records for aspmx.l.google.com return 172.253.139.27 and 2607:f8b0:4004:c1d::1a.
The A records for alt1.aspmx.l.google.com return 108.177.123.27 and 2800:3f0:4003:c0f::1a.
The A records for alt2.aspmx.l.google.com return 172.253.116.26 and 2a00:1450:400b:c02::1b.
aspmx2.googlemail.com and alt1.aspmx.l.google.com each have 108.177.123.27 IP addresses.
aspmx3.googlemail.com and alt2.aspmx.l.google.com each have 172.253.116.26 IP addresses.