21b.ai - robtex.com
21b.ai
| DNSSEC | ⚠️ Not signed | ||||||
| A | 138.197.155.73🇨🇦 DIGITALOCEAN138.197.144.0/20 DigitalOcean | ||||||
| PTR | 98eb69dcdb4c166695e109108bc9553c.hostedonsporestack.com | ||||||
| NS | dns1.icedns.is ⭐ | ||||||
| A | 82.221.143.41🇮🇸 ThorDC-AS82.221.143.0/24 Advania / Thor Data Center | ||||||
| PTR | dns1.icedns.is | ||||||
| NS | dns2.icedns.is | ||||||
| A | 82.221.139.80🇮🇸 ThorDC-AS82.221.139.0/24 Advania / Thor Data Center | ||||||
| MX | 21b.ai ⭐ | ||||||
| A | 138.197.155.73🇨🇦 DIGITALOCEAN138.197.144.0/20 DigitalOcean | ||||||
| PTR | 98eb69dcdb4c166695e109108bc9553c.hostedonsporestack.com | ||||||
| SOA | dns1.icedns.isroot@dns.icedns.is 2026-07-06 #0 | ||||||
ai
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | v0n0.nic.ai ⭐ | ||||||
| NS | v0n1.nic.ai | ||||||
| NS | v0n2.nic.ai | ||||||
| NS | v0n3.nic.ai | ||||||
| NS | v2n0.nic.ai | ||||||
| NS | v2n1.nic.ai | ||||||
| SOA | v0n0.nic.aihostmaster@donuts.email serial=1784099762 | ||||||
MX for
21b.ai |
Same first word
Similar names
DNS History
5 records (4 active, 1 former)
●MX21b.ai2026-06-22 → 2026-07-15 · 2 obs
● 2026-07-15 07:31:22
●A138.197.155.732026-07-09 → 2026-07-15 · 3 obs
● 2026-07-09 11:22:30
● 2026-07-15 07:31:22
○A68.183.45.712026-06-22 → 2026-06-22 · 3 obs
○ 2026-07-09 11:22:30
○ 2026-07-15 07:31:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ai | v0n0.nic.ai, v0n1.nic.ai, v0n2.nic.ai, v0n3.nic.ai... | - |
| 21b.ai | dns2.icedns.is, dns1.icedns.is | - |
✅ Authoritative Response
Server:82.221.143.41
NS records: dns2.icedns.is, dns1.icedns.is
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21b.ai (unsigned zone)
⏱️ Timing
Total: 1037ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 138.197.155.73 |
| NS | 2 | dns2.icedns.is, dns1.icedns.is |
| MX | 1 | 21b.ai (pri: 0) |
| SOA | 1 | dns1.icedns.is root.dns.icedns.is |
Analysis
Mail Server Role
21b.ai handles its own mail, functioning as its own mail server.
IP Addresses
21b.ai resolves to just one IP address, 138.197.155.73.
Name Servers
21b.ai is served by two delegated name servers, dns1.icedns.is and dns2.icedns.is.
21b.ai shares its NS records with other domains, for example 2timothy1-3.com, axsterra.com, chartyn.com and two others.
dns1.icedns.is and dns2.icedns.is each resolve to one IP number: dns1.icedns.is points to 82.221.143.41 and dns2.icedns.is points to 82.221.139.80.
Mail Servers
21b.ai is served by just one mail server: 21b.ai.
There is one IP number for 21b.ai: 138.197.155.73.