classes.com.hk - dns.ninja
classes.com.hk
com.hk
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns3.hkirc.net.hk ⭐ | ||||||
| NS | c.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | d.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | m.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | t.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | u.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | v.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | x.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | y.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| NS | z.hkirc.net.hk ⚠️ Not in parent delegation | ||||||
| SOA | ns3.hkirc.net.hkhostmaster@hkirc.net.hk serial=2073578458 | ||||||
PTR for
Same first word
Similar names
DNS History
9 records (5 active, 4 former)
●NSns-cloud-c1.googledomains.com2026-02-15 → 2026-08-14 · 3 obs
● 2026-02-15 15:16:44
● 2026-08-14 18:49:34
●NSns-cloud-c2.googledomains.com2026-02-15 → 2026-08-14 · 3 obs
● 2026-02-15 15:16:44
● 2026-08-14 18:49:34
●NSns-cloud-c3.googledomains.com2026-02-15 → 2026-08-14 · 3 obs
● 2026-02-15 15:16:44
● 2026-08-14 18:49:34
●NSns-cloud-c4.googledomains.com2026-02-15 → 2026-08-14 · 3 obs
● 2026-02-15 15:16:44
● 2026-08-14 18:49:34
○NSns.classes.com.hk2015-05-26 → 2017-05-07 · 4 obs
● 2017-05-07 19:36:58
○ 2026-02-15 15:16:44
○ 2026-08-14 18:49:34
●MXclasses-com-hk.mail.protection.outlook.com2026-02-15 → 2026-08-14 · 3 obs
● 2026-02-15 15:16:44
● 2026-08-14 18:49:34
○MXmail.classes.com.hk2015-05-26 → 2017-05-07 · 4 obs
● 2017-05-07 19:36:58
○ 2026-02-15 15:16:44
○ 2026-08-14 18:49:34
○A122.128.107.1442015-05-26 → 2015-05-26 · 3 obs
○ 2015-10-27 02:44:36
○ 2026-08-14 18:49:34
○A45.115.36.842015-10-27 → 2026-02-15 · 5 obs
● 2015-10-27 02:44:36
● 2026-02-15 15:16:44
○ 2026-03-23 12:38:36
○ 2026-08-14 18:49:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| hk | v.hkirc.net.hk, y.hkirc.net.hk, z.hkirc.net.hk, c.hkirc.net.hk... | - |
| classes.com.hk | ns-cloud-c4.googledomains.com, ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com | - |
✅ Authoritative Response
Server:216.239.36.108
NS records: ns-cloud-c4.googledomains.com, ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for classes.com.hk (unsigned zone)
⏱️ Timing
Total: 614ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 4 | ns-cloud-c4.googledomains.com, ns-cloud-c3.googledomains.com... |
| MX | 1 | classes-com-hk.mail.protection.outlook.c |
| TXT | 1 | v=spf1 include:spf.protection.outlook.co |
| SOA | 1 | ns-cloud-c1.googledomains.com cloud-dns- |
Analysis
Name Servers
The authoritative name servers for classes.com.hk are ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com and ns-cloud-c4.googledomains.com.
There is at least partial name server overlap between classes.com.hk and other domains — candleblower.com, bankrepocarsales.com, opencatalog.com and two more among them.
All four hostnames — ns-cloud-c1.googledomains.com, ns-cloud-c2.googledomains.com, ns-cloud-c3.googledomains.com and ns-cloud-c4.googledomains.com — resolve to two IP numbers apiece: ns-cloud-c1.googledomains.com to 216.239.32.108 and 2001:4860:4802:32::6c; ns-cloud-c2.googledomains.com to 216.239.34.108 and 2001:4860:4802:34::6c; ns-cloud-c3.googledomains.com to 216.239.36.108 and 2001:4860:4802:36::6c; ns-cloud-c4.googledomains.com to 216.239.38.108 and 2001:4860:4802:38::6c.
Mail Servers
Mail for classes.com.hk is handled by a single mail server, classes-com-hk.mail.protection.outlook.com.
classes-com-hk.mail.protection.outlook.com resolves to 6 IP addresses — 52.101.124.117, 52.101.137.0, 52.101.157.80 and 3 others.