class.io - dns.ninja
class.io
io
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.nic.io ⭐ | ||||||
| NS | a2.nic.io | ||||||
| NS | b0.nic.io | ||||||
| NS | c0.nic.io | ||||||
| SOA | a0.nic.iohostmaster@donuts.email serial=1784341444 | ||||||
Subdomains
Same first word
Similar names
DNS History
13 records (13 active, 0 former)
●NSfreedns1.registrar-servers.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●NSfreedns2.registrar-servers.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●NSfreedns3.registrar-servers.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●NSfreedns4.registrar-servers.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●NSfreedns5.registrar-servers.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●MXalt1.aspmx.l.google.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●MXalt2.aspmx.l.google.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●MXaspmx.l.google.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●MXaspmx2.googlemail.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●MXaspmx3.googlemail.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●MXaspmx4.googlemail.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●MXaspmx5.googlemail.com2015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
●A74.207.235.702015-08-03 → 2026-07-18 · 2 obs
● 2026-07-18 02:49:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| io | a0.nic.io, a2.nic.io, b0.nic.io, c0.nic.io | - |
| class.io | freedns4.registrar-servers.com, freedns3.registrar-servers.com, freedns1.registrar-servers.com, freedns5.registrar-servers.com... | - |
✅ Authoritative Response
Server:95.141.37.127
NS records: freedns4.registrar-servers.com, freedns3.registrar-servers.com, freedns1.registrar-servers.com, freedns5.registrar-servers.com, freedns2.registrar-servers.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for class.io (unsigned zone)
⏱️ Timing
Total: 709ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 74.207.235.70 |
| NS | 5 | freedns1.registrar-servers.com, freedns3.registrar-servers.com... |
| MX | 7 | aspmx3.googlemail.com (pri: 10), aspmx4.googlemail.com (pri: 30)... |
| SOA | 1 | freedns1.registrar-servers.com hostmaste |
Analysis
Hierarchy
my.class.io and www.class.io are both subdomains of class.io.
IP Addresses
class.io resolves to one IP address: 74.207.235.70.
Host names such as 74-207-235-70.ip.linodeusercontent.com, my.class.io and www.class.io share their IP numbers with class.io.
Name Servers
class.io has five name servers, which are freedns1.registrar-servers.com, freedns2.registrar-servers.com, freedns3.registrar-servers.com and two others.
At least some of class.io's name servers are shared with other domains, for example aroundtheworld.co.uk, lear.co.uk, capital.md and two more.
These name servers tend to be deployed in combination with the name servers freedns4.registrar-servers.com and freedns5.registrar-servers.com.
Hostnames that resolve to two IP addresses:
freedns1.registrar-servers.com points to 45.58.122.83 and 2605:9880:300:1400:101:1650:5e2:54.
freedns2.registrar-servers.com points to 199.119.202.76 and 2604:6600:0:1b::2.
freedns3.registrar-servers.com points to 195.154.94.174 and 2001:bc8:6006:4000:8218:44ff:feef:d720.
freedns4.registrar-servers.com points to 95.141.37.127 and 2a02:29e0:1:103:103::1.
freedns5.registrar-servers.com points to 54.36.109.15 and 2001:41d0:700:120f::1.
Mail Servers
class.io uses 7 mail servers for delivery: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and 4 other.
class.io has at least partial mail server overlap with other domains such as ns500758.ns500698.ns500758.ns500758.ns500698.ns500736.ns500698.ns500708.ns500576.ns500698.ns500576.ns500698.ns500698.ns500576.ns500576.ns500619.ns500619.trackreceptor.com, ns500734.ns500734.ns500699.ns500693.ns500734.ns500699.ns500699.ns500699.ns500588.ns500683.ns500632.ns500588.dtrkdll.com, owllies.com and two more.
These mail servers commonly co-occur with mail servers alt2.aspmx.l.google.com, alt1.aspmx.l.google.com, aspmx.l.google.com and 3 others.
Hostnames that resolve to two IP addresses:
aspmx2.googlemail.com points to 108.177.123.26 and 2800:3f0:4003:c0f::1a.
aspmx3.googlemail.com points to 172.253.116.27 and 2a00:1450:400b:c02::1b.
aspmx4.googlemail.com points to 192.178.223.26 and 2a00:1450:4009:c0f::1b.
aspmx5.googlemail.com points to 172.253.157.27 and 2a00:1450:400c:c23::1a.
aspmx.l.google.com points to 142.250.31.26 and 2607:f8b0:4004:c1b::1b.
alt1.aspmx.l.google.com points to 108.177.123.26 and 2800:3f0:4003:c0f::1a.
alt2.aspmx.l.google.com points to 172.253.116.26 and 2a00:1450:400b:c02::1a.
aspmx2.googlemail.com and alt1.aspmx.l.google.com are host names that each point to 2800:3f0:4003:c0f::1a IP addresses.
aspmx2.googlemail.com and alt1.aspmx.l.google.com are host names that each point to 108.177.123.26 IP addresses.