kernel.is - dns.ninja
kernel.is
| DNSSEC | ⚠️ Not signed | ||||||
| A | 51.81.142.141🇺🇸 OVH51.81.128.0/17 Hosting route | ||||||
| PTR | kernel.is | ||||||
| NS | ns.njord.resolver.is ⭐ | ||||||
| A | 198.251.86.87🇺🇸 FRANTECH198.251.86.0/24 More specific route. | ||||||
| PTR | ns.njord.resolver.is | ||||||
| NS | ns.skadi.resolver.is | ||||||
| A | 198.251.90.87FRANTECH198.251.90.0/24 More specific route. | ||||||
| PTR | ns.skadi.resolver.is | ||||||
| MX | mail.hostname.is ⭐ | ||||||
| A | 15.204.6.26🇺🇸 OVH15.204.0.0/17 Hosting route | ||||||
| PTR | ip26.ip-15-204-6.us | ||||||
| TXT | v=spf1 mx mx:kernel.is -all | ||||||
| SOA | ns.njord.resolver.isnoc@resolver.is 2026-01-03 #2 | ||||||
is
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.is ⭐ | ||||||
| NS | c.nic.is | ||||||
| NS | d.nic.is | ||||||
| NS | e.nic.is | ||||||
| NS | f.nic.is | ||||||
| SOA | a.nic.ishostmaster@isnic.is serial=1780829402 | ||||||
PTR for
Subdomains
mail.kernel.is |
Same first word
Similar names
DNS History
9 records (4 active, 5 former)
○NSns.mimir.hacked.is2019-12-13 → 2021-06-30 · 4 obs
● 2021-06-30 00:37:30
○ 2026-02-21 11:31:32
○ 2026-06-07 11:06:34
●NSns.njord.resolver.is2026-02-21 → 2026-06-07 · 3 obs
● 2026-02-21 11:31:32
● 2026-06-07 11:06:34
●NSns.skadi.resolver.is2026-02-21 → 2026-06-07 · 3 obs
● 2026-02-21 11:31:32
● 2026-06-07 11:06:34
○NSns.tyr.hacked.is2019-12-13 → 2021-06-30 · 4 obs
● 2021-06-30 00:37:30
○ 2026-02-21 11:31:32
○ 2026-06-07 11:06:34
●MXmail.hostname.is2026-02-21 → 2026-06-07 · 3 obs
● 2026-02-21 11:31:32
● 2026-06-07 11:06:34
○MXmail.kernel.is2019-12-13 → 2021-06-30 · 4 obs
● 2021-06-30 00:37:30
○ 2026-02-21 11:31:32
○ 2026-06-07 11:06:34
○A51.15.42.02019-12-13 → 2019-12-13 · 3 obs
○ 2021-06-30 00:37:30
○ 2026-06-07 11:06:34
○A51.222.235.262021-06-30 → 2021-06-30 · 4 obs
● 2021-06-30 00:37:30
○ 2026-02-21 11:31:32
○ 2026-06-07 11:06:34
●A51.81.142.1412026-02-21 → 2026-06-07 · 3 obs
● 2026-02-21 11:31:32
● 2026-06-07 11:06:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| is | a.nic.is, c.nic.is, d.nic.is, e.nic.is... | - |
| kernel.is | ns.njord.resolver.is, ns.skadi.resolver.is | 4 records |
✅ Authoritative Response
Server:198.251.86.87
NS records: ns.njord.resolver.is, ns.skadi.resolver.is
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for kernel.is (unsigned zone)
⏱️ Timing
Total: 532ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 51.81.142.141 |
| NS | 2 | ns.njord.resolver.is, ns.skadi.resolver.is |
| MX | 1 | mail.hostname.is (pri: 10) |
| TXT | 1 | v=spf1 mx mx:kernel.is -all |
| SOA | 1 | ns.njord.resolver.is noc.resolver.is |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns.njord.resolver.is, ns.njord.resolver.is, ns.skadi.resolver.is...)
Analysis
Hierarchy
mail.kernel.is is a subdomain of kernel.is.
IP Addresses
kernel.is resolves to one IP address: 51.81.142.141.
Name Servers
DNS delegation for kernel.is points to two name servers: ns.njord.resolver.is and ns.skadi.resolver.is.
kernel.is shares the same name server setup with other domains, for instance hostname.is and resolver.is.
Both ns.njord.resolver.is and ns.skadi.resolver.is have a single IP address each — ns.njord.resolver.is resolves to 198.251.86.87 while ns.skadi.resolver.is resolves to 198.251.90.87.
Mail Servers
Mail for kernel.is is handled by a single mail server, mail.hostname.is.
The mail server configuration of kernel.is is identical to that of other domains — hostname.is being one example.
mail.hostname.is has exactly one IP number: 15.204.6.26.