classlab.pt - dns.ninja
classlab.pt
| DNSSEC | ⚠️ Not signed | ||||||
| A | 176.79.18.247🇵🇹 MEO-RESIDENCIAL176.78.0.0/15 PT Comunicacoes S.A. | ||||||
| PTR | dsl-18-247.bl27.telepac.pt | ||||||
| NS | dns100.ovh.net ⭐ | ||||||
| A | 2001:41d0:d00:fa00::2🇫🇷 OVH2001:41d0::/32 IPv6 | ||||||
| PTR | dns100.ovh.net | ||||||
| A | 5.135.250.177🇫🇷 OVH5.135.0.0/16 | ||||||
| PTR | dns100.ovh.net | ||||||
| NS | ns100.ovh.net | ||||||
| A | 2001:41d0:b00:f400::2🇫🇷 OVH2001:41d0::/32 IPv6 | ||||||
| PTR | ns100.ovh.net | ||||||
| A | 5.135.44.185🇧🇪 OVH5.135.0.0/16 | ||||||
| PTR | ns100.ovh.net | ||||||
| MX | mx1.mail.ovh.net ⭐ | ||||||
| A | 188.165.36.237🇫🇷 OVH188.165.0.0/16 ISP Paris, France | ||||||
| PTR | mx1.mail.ovh.net | ||||||
| MX | mx2.mail.ovh.net(5) | ||||||
| A | 87.98.160.167🇫🇷 OVH87.98.128.0/17 ISP Paris, France | ||||||
| PTR | mx2.mail.ovh.net | ||||||
| MX | mx3.mail.ovh.net(100) | ||||||
| A | 91.121.53.175🇫🇷 OVH91.121.0.0/16 ISP Paris, France | ||||||
| PTR | mx3.mail.ovh.net | ||||||
| TXT | 1|www.classlab.pt | ||||||
| TXT | v=spf1 include:mx.ovh.com ~all | ||||||
| SOA | dns100.ovh.nettech@ovh.net 2024-07-09 #0 | ||||||
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 | ||||||
| NS | ns2.nic.fr | ||||||
| SOA | curiosity.dns.ptrequest@dns.pt 2026-08-09 #16 | ||||||
Same first word
Similar names
DNS History
7 records (6 active, 1 former)
●MXmx1.mail.ovh.net2018-08-01 → 2026-08-09 · 2 obs
● 2026-08-09 07:52:58
●MXmx2.mail.ovh.net2018-08-01 → 2026-08-09 · 2 obs
● 2026-08-09 07:52:58
●MXmx3.mail.ovh.net2018-08-01 → 2026-08-09 · 2 obs
● 2026-08-09 07:52:58
●A176.79.18.2472026-03-23 → 2026-08-09 · 3 obs
● 2026-03-23 14:15:36
● 2026-08-09 07:52:58
○A37.189.171.1862018-08-01 → 2018-08-01 · 3 obs
○ 2026-03-23 14:15:36
○ 2026-08-09 07:52:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| pt | ns.dns.br, h.dns.pt, g.dns.pt, e.dns.pt... | 15 records |
| classlab.pt | dns100.ovh.net, ns100.ovh.net | - |
✅ Authoritative Response
Server:5.135.44.185
NS records: dns100.ovh.net, ns100.ovh.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for classlab.pt (unsigned zone)
⏱️ Timing
Total: 2545ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 176.79.18.247 |
| NS | 2 | dns100.ovh.net, ns100.ovh.net |
| MX | 3 | mx2.mail.ovh.net (pri: 5), mx1.mail.ovh.net (pri: 1)... |
| TXT | 2 | 1|www.classlab.pt, v=spf1 include:mx.ovh.com ~all |
| SOA | 1 | dns100.ovh.net tech.ovh.net |
📌 Glue Records Collected
Total: 15
In-bailiwick: 11 (h.dns.pt, g.dns.pt, e.dns.pt...)
Out-of-bailiwick: 4 (ns2.nic.fr, ns.dns.br, ns2.nic.fr...)
Analysis
IP Addresses
classlab.pt resolves to one IP address: 176.79.18.247.
dsl-18-247.bl27.telepac.pt, for instance, is one of the other host names sharing IP numbers with classlab.pt.
Name Servers
classlab.pt uses two name servers for its delegation: dns100.ovh.net and ns100.ovh.net.
classlab.pt uses the same name servers as several other domains — among them selectimmo.be, web-in-black.com, ip-94-23-203.eu and two more.
At least some of classlab.pt's name servers are shared with other domains, for example 7ges.com and radiovale.it.
The two host names dns100.ovh.net and ns100.ovh.net each have a pair of IP addresses: dns100.ovh.net has 5.135.250.177 and 2001:41d0:d00:fa00::2, and ns100.ovh.net has 5.135.44.185 and 2001:41d0:b00:f400::2.
Mail Servers
The MX records for classlab.pt list three mail servers: mx1.mail.ovh.net, mx2.mail.ovh.net and mx3.mail.ovh.net.
classlab.pt has at least partial mail server overlap with other domains such as waacje.pl, ps77.fr, webidea.fr and two more.
It is common to find these mail servers used together with the mail servers mx4.mail.ovh.net and mx0.mail.ovh.net.
The hostnames mx1.mail.ovh.net, mx2.mail.ovh.net and mx3.mail.ovh.net each resolve to a single IP: mx1.mail.ovh.net → 188.165.36.237, mx2.mail.ovh.net → 87.98.160.167, mx3.mail.ovh.net → 91.121.53.175.