knowtheory.com - robtex.com
knowtheory.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-cloud-d1.googledomains.com ⚠️ Not in zone NS records | ||||||
| A | 2001:4860:4802:32::6d🇺🇸 Google2001:4860::/32 | ||||||
| PTR | ns-cloud-d1.googledomains.com | ||||||
| A | 216.239.32.109🇺🇸 Google216.239.32.0/24 | ||||||
| PTR | ns-cloud-d1.googledomains.com | ||||||
| NS | ns-cloud-d2.googledomains.com ⚠️ Not in zone NS records | ||||||
| A | 2001:4860:4802:34::6d🇺🇸 Google2001:4860::/32 | ||||||
| PTR | ns-cloud-d2.googledomains.com | ||||||
| A | 216.239.34.109🇺🇸 Google216.239.34.0/24 | ||||||
| PTR | ns-cloud-d2.googledomains.com | ||||||
| NS | ns-cloud-d3.googledomains.com ⚠️ Not in zone NS records | ||||||
| A | 2001:4860:4802:36::6d🇺🇸 Google2001:4860::/32 | ||||||
| PTR | ns-cloud-d3.googledomains.com | ||||||
| A | 216.239.36.109🇺🇸 Google216.239.36.0/24 | ||||||
| PTR | ns-cloud-d3.googledomains.com | ||||||
| NS | ns-cloud-d4.googledomains.com ⚠️ Not in zone NS records | ||||||
| A | 2001:4860:4802:38::6d🇺🇸 Google2001:4860::/32 | ||||||
| PTR | ns-cloud-d4.googledomains.com | ||||||
| A | 216.239.38.109🇺🇸 Google216.239.38.0/24 | ||||||
| PTR | ns-cloud-d4.googledomains.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=1777049586 | ||||||
Same first word
knowtheory.com |
DNS History
11 records (4 active, 7 former)
●NSns-cloud-d1.googledomains.com2026-02-15 → 2026-04-24 · 3 obs
● 2026-02-15 06:42:40
● 2026-04-24 17:16:02
●NSns-cloud-d2.googledomains.com2026-02-15 → 2026-04-24 · 3 obs
● 2026-02-15 06:42:40
● 2026-04-24 17:16:02
●NSns-cloud-d3.googledomains.com2026-02-15 → 2026-04-24 · 3 obs
● 2026-02-15 06:42:40
● 2026-04-24 17:16:02
●NSns-cloud-d4.googledomains.com2026-02-15 → 2026-04-24 · 3 obs
● 2026-02-15 06:42:40
● 2026-04-24 17:16:02
○NSns1.yourhostingaccount.com2015-06-09 → 2017-03-18 · 5 obs
● 2015-06-09 12:07:56
● 2017-03-18 17:40:14
○ 2026-02-15 06:42:40
○ 2026-04-24 17:16:02
○NSns2.yourhostingaccount.com2015-06-09 → 2017-03-18 · 5 obs
● 2015-06-09 12:07:56
● 2017-03-18 17:40:14
○ 2026-02-15 06:42:40
○ 2026-04-24 17:16:02
○NSns51.1and1.com2008-03-13 → 2008-03-13 · 3 obs
○ 2015-06-09 12:07:56
○ 2026-04-24 17:16:02
○NSns52.1and1.com2008-03-13 → 2008-03-13 · 3 obs
○ 2015-06-09 12:07:56
○ 2026-04-24 17:16:02
○A66.96.149.162016-02-09 → 2016-06-19 · 5 obs
● 2016-02-09 09:34:32
● 2016-06-19 18:15:52
○ 2017-03-18 17:40:14
○ 2026-04-24 17:16:02
○A66.96.149.242017-03-18 → 2026-02-15 · 5 obs
● 2017-03-18 17:40:14
● 2026-02-15 06:42:40
○ 2026-03-06 21:02:56
○ 2026-04-24 17:16:02
○A66.96.161.1512015-06-09 → 2015-10-27 · 5 obs
● 2015-06-09 12:07:56
● 2015-10-27 11:49:52
○ 2016-02-09 09:34:32
○ 2026-04-24 17:16:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| knowtheory.com | ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com, ns-cloud-d4.googledomains.com | 8 records |
✅ Authoritative Response
Server:216.239.38.109
NS records: ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com, ns-cloud-d4.googledomains.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for knowtheory.com (unsigned zone)
⏱️ Timing
Total: 244ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
📌 Glue Records Collected
Total: 8
Out-of-bailiwick: 8 (ns-cloud-d1.googledomains.com, ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com...)
Analysis
Name Servers
knowtheory.com delegates to four name servers: ns-cloud-d1.googledomains.com, ns-cloud-d2.googledomains.com, ns-cloud-d3.googledomains.com and ns-cloud-d4.googledomains.com.
knowtheory.com at least partially shares name servers with other domains, for instance neartools.com, anacolutha.com, epleyseed.com, astickadogandaboxwithsomethinginit.com and pskapp.com.
Host names with two IP numbers: ns-cloud-d1.googledomains.com points to 2001:4860:4802:32::6d and 216.239.32.109; ns-cloud-d2.googledomains.com points to 2001:4860:4802:34::6d and 216.239.34.109; ns-cloud-d3.googledomains.com points to 2001:4860:4802:36::6d and 216.239.36.109; ns-cloud-d4.googledomains.com points to 2001:4860:4802:38::6d and 216.239.38.109.