knowledgecircle.pt - dns.ninja
knowledgecircle.pt
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 193.137.192.37🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET | ||||||
| NS | ns1.knowledgecircle.pt ⭐ ⚠️ Not in parent delegation | ||||||
| A | 193.137.192.66🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET | ||||||
| NS | ns.ipca.pt ⚠️ Not in zone NS records | ||||||
| A | 193.137.231.253🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET | ||||||
| PTR | ns.ipca.pt | ||||||
| PTR | ns.knowledgecircle.pt | ||||||
| NS | ns.knowledgecircle.pt ⚠️ Not in parent delegation | ||||||
| A | 193.137.231.253🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET | ||||||
| PTR | ns.ipca.pt | ||||||
| PTR | ns.knowledgecircle.pt | ||||||
| NS | ns1.ipca.pt ⚠️ Not in zone NS records | ||||||
| A | 193.137.192.66🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET | ||||||
| MX | mail.knowledgecircle.pt ⭐ | ||||||
| A | 193.137.231.248🇵🇹 RCCN193.136.0.0/15 -AGGREGATED-NET | ||||||
| PTR | mail.ipca.pt | ||||||
| PTR | tango.ipca.pt | ||||||
| TXT | v=spf1 include:ip4:193.137.231.224/27 -all | ||||||
| TXT | HARICA-OHw4gpWyLtDWg9JX2RD | ||||||
| SOA | ns.knowledgecircle.ptadmin@ipca.pt 2026-07-20 #12 | ||||||
pt
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | curiosity.dns.pt ⭐ | ||||||
| NS | a.dns.pt | ||||||
| NS | b.dns.pt | ||||||
| NS | c.dns.pt | ||||||
| NS | d.dns.pt | ||||||
| NS | e.dns.pt | ||||||
| NS | g.dns.pt | ||||||
| NS | h.dns.pt | ||||||
| NS | ns.dns.br ⚠️ Not in parent delegation | ||||||
| NS | ns2.nic.fr ⚠️ Not in parent delegation | ||||||
| SOA | curiosity.dns.ptrequest@dns.pt 2026-07-25 #9 | ||||||
Same first word
DNS History
6 records (6 active, 0 former)
●NSns.knowledgecircle.pt2026-07-25 → 2026-07-25 · 2 obs
● 2026-07-25 04:15:44
●NSns1.knowledgecircle.pt2026-07-25 → 2026-07-25 · 2 obs
● 2026-07-25 04:15:44
●MXmail.knowledgecircle.pt2026-07-25 → 2026-07-25 · 2 obs
● 2026-07-25 04:15:44
●A193.137.192.372026-07-25 → 2026-07-25 · 2 obs
● 2026-07-25 04:15:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| pt | a.dns.pt, b.dns.pt, c.dns.pt, d.dns.pt... | - |
| knowledgecircle.pt | ns1.ipca.pt, ns.ipca.pt | 2 records |
✅ Authoritative Response
Server:193.137.192.66
NS records: ns1.ipca.pt, ns.ipca.pt
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 545ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 193.137.192.37 |
| NS | 2 | ns.knowledgecircle.pt, ns1.knowledgecircle.pt |
| MX | 1 | mail.knowledgecircle.pt (pri: 10) |
| TXT | 2 | v=spf1 include:ip4:193.137.231.224/27 -a, HARICA-OHw4gpWyLtDWg9JX2RD |
| SOA | 1 | ns.knowledgecircle.pt admin.ipca.pt |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.ipca.pt, ns.ipca.pt)
Analysis
IP Addresses
knowledgecircle.pt has exactly one IP address — 193.137.192.37.
elearning.ipca.pt, for instance, is one of the other host names sharing IP numbers with knowledgecircle.pt.
Name Servers
Four name servers handle the delegation for knowledgecircle.pt: ns1.ipca.pt, ns.ipca.pt, ns1.knowledgecircle.pt and ns.knowledgecircle.pt.
knowledgecircle.pt shares at least some of its name servers with other domains, such as 231.137.193.in-addr.arpa and ipca.pt.
The four host names ns1.ipca.pt, ns.ipca.pt, ns1.knowledgecircle.pt and ns.knowledgecircle.pt each resolve to a single IP address. ns1.ipca.pt and ns1.knowledgecircle.pt both point to 193.137.192.66, while ns.ipca.pt and ns.knowledgecircle.pt both point to 193.137.231.253.
Both ns1.ipca.pt and ns1.knowledgecircle.pt resolve to 193.137.192.66 IP addresses each.
Both ns.ipca.pt and ns.knowledgecircle.pt resolve to 193.137.231.253 IP addresses each.
Mail Servers
knowledgecircle.pt uses one mail server — mail.knowledgecircle.pt.
mail.knowledgecircle.pt directs to just one IP number, 193.137.231.248.