21b.io - robtex.com
21b.io
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns-1319.awsdns-36.org ⚠️ Not in zone NS records | ||||||
| NS | ns-1682.awsdns-18.co.uk ⚠️ Not in zone NS records | ||||||
| NS | ns-264.awsdns-33.com ⚠️ Not in zone NS records | ||||||
| NS | ns-654.awsdns-17.net ⚠️ Not in zone NS records | ||||||
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=1783537761 | ||||||
DNS History
13 records (4 active, 9 former)
○NSns-1274.awsdns-31.org2018-05-08 → 2018-05-08 · 3 obs
● 2018-05-08 11:51:14
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
●NSns-1319.awsdns-36.org2020-12-24 → 2026-07-08 · 3 obs
○ 2018-05-08 11:51:14
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
●NSns-1682.awsdns-18.co.uk2020-12-24 → 2026-07-08 · 3 obs
○ 2018-05-08 11:51:14
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
○NSns-1764.awsdns-28.co.uk2018-05-08 → 2018-05-08 · 3 obs
● 2018-05-08 11:51:14
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
○NSns-209.awsdns-26.com2018-05-08 → 2018-05-08 · 3 obs
● 2018-05-08 11:51:14
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
●NSns-264.awsdns-33.com2020-12-24 → 2026-07-08 · 3 obs
○ 2018-05-08 11:51:14
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
●NSns-654.awsdns-17.net2020-12-24 → 2026-07-08 · 3 obs
○ 2018-05-08 11:51:14
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
● 2020-12-24 12:11:46
● 2026-07-08 19:59:38
○NSns-868.awsdns-44.net2018-05-08 → 2018-05-08 · 3 obs
● 2018-05-08 11:51:14
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
○ 2020-12-24 12:11:46
○ 2026-07-08 19:59:38
○MXalt1.aspmx.l.google.com2020-12-24 → 2020-12-24 · 3 obs
● 2020-12-24 12:11:46
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○MXalt2.aspmx.l.google.com2020-12-24 → 2020-12-24 · 3 obs
● 2020-12-24 12:11:46
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○MXalt3.aspmx.l.google.com2020-12-24 → 2020-12-24 · 3 obs
● 2020-12-24 12:11:46
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○MXalt4.aspmx.l.google.com2020-12-24 → 2020-12-24 · 3 obs
● 2020-12-24 12:11:46
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○MXaspmx.l.google.com2020-12-24 → 2020-12-24 · 3 obs
● 2020-12-24 12:11:46
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
○ 2026-06-25 03:45:22
○ 2026-07-08 19:59:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| io | c0.nic.io, b0.nic.io, a0.nic.io, a2.nic.io | - |
| 21b.io | ns-264.awsdns-33.com, ns-654.awsdns-17.net, ns-1319.awsdns-36.org, ns-1682.awsdns-18.co.uk | - |
✅ Authoritative Response
Server:205.251.198.146
NS records: ns-264.awsdns-33.com, ns-654.awsdns-17.net, ns-1319.awsdns-36.org, ns-1682.awsdns-18.co.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21b.io (unsigned zone)
⏱️ Timing
Total: 1632ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
Analysis
Name Servers
The authoritative name servers for 21b.io are ns-264.awsdns-33.com, ns-654.awsdns-17.net, ns-1319.awsdns-36.org and ns-1682.awsdns-18.co.uk.