classmaster.online - robtex.com
classmaster.online
| DNSSEC | ⚠️ Not signed | ||||||
| A | 213.155.0.230 | ||||||
| PTR | startersite.uk.chimera.uk2group.com | ||||||
| NS | dns1.uk2.net ⭐ | ||||||
| A | 213.155.0.223 | ||||||
| PTR | dns1.uk.chimera.uk2group.com | ||||||
| NS | dns2.uk2.net | ||||||
| A | 213.155.0.224 | ||||||
| PTR | dns2.uk.chimera.uk2group.com | ||||||
| NS | dns3.uk2.net | ||||||
| A | 213.155.0.226 | ||||||
| PTR | dns3.uk.chimera.uk2group.com | ||||||
| MX | mx.stackmail.com ⭐ | ||||||
| A | 185.151.28.67🇬🇧 TWENTYI185.151.28.0/24 | ||||||
| PTR | mx.stackmail.com | ||||||
| TXT | v=spf1 include:spf.stackmail.com a mx -all | ||||||
| SOA | dns1.uk2.nethostmaster@uk2.net serial=0 | ||||||
online
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns01.trs-dns.com ⭐ | ||||||
| NS | ns.trs-dns.com | ||||||
| NS | ns01.trs-dns.net | ||||||
| NS | ns10.trs-dns.info | ||||||
| NS | ns10.trs-dns.org | ||||||
| SOA | ns.trs-dns.comtrs-ops@tucows.com serial=1792471117 | ||||||
Same first word
Similar names
Previous names
Next names
DNS History
5 records (5 active, 0 former)
●MXmx.stackmail.com2026-09-13 → 2026-10-20 · 2 obs
● 2026-10-20 05:06:42
●A213.155.0.2302026-09-13 → 2026-10-20 · 2 obs
● 2026-10-20 05:06:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| online | ns01.trs-dns.com, ns01.trs-dns.net, ns10.trs-dns.org, ns10.trs-dns.info | - |
| classmaster.online | dns1.uk2.net, dns3.uk2.net, dns2.uk2.net | - |
✅ Authoritative Response
Server:213.155.0.226
NS records: dns1.uk2.net, dns3.uk2.net, dns2.uk2.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for classmaster.online (unsigned zone)
⏱️ Timing
Total: 3228ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 213.155.0.230 |
| NS | 3 | dns2.uk2.net, dns3.uk2.net... |
| MX | 1 | mx.stackmail.com (pri: 0) |
| TXT | 1 | v=spf1 include:spf.stackmail.com a mx -a |
| SOA | 1 | dns1.uk2.net hostmaster.uk2.net |
Analysis
IP Addresses
classmaster.online points to a single IP number: 213.155.0.230.
Additional host names — clarkitecture.co.uk, cornwallbreaks.co.uk, ayulankaretreats.co.uk and two others — share IP numbers with classmaster.online.
Name Servers
classmaster.online has three name servers — dns1.uk2.net, dns2.uk2.net and dns3.uk2.net.
classmaster.online partially shares its NS delegation with several other domains, including ww1-event.org, gre-eco.uk, surveyorselect.co.uk and two others.
These name servers are frequently paired with the name servers ultra101.uk2.net, ultra102.uk2.net, ultra103.uk2.net and two others.
Each of the three hostnames points to exactly one IP address: dns1.uk2.net points to 213.155.0.223, dns2.uk2.net points to 213.155.0.224 and dns3.uk2.net points to 213.155.0.226.
Mail Servers
classmaster.online has one mail server: mx.stackmail.com.
classmaster.online shares the same mail server setup as other domains, including windowsurgery.co.uk, jonoandsal.com, robertuden.co.uk and two others.
classmaster.online partially shares its mail servers with other domains, britanniacollege.uk and tpmb.uk being examples.
mx.stackmail.com points to one IP number — 185.151.28.67.