jonasbruus.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.100.45.17 is hosted by DKTV A/S (AS15516) in Denmark. Mail is handled by mx1.startmail.com, mx2.startmail.com. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 91.100.45.17 | 3600s | 91.100.45.17.generic-hostname.arrownet.dk | AS15516 | DKTV A/S | 91.100.0.0/15 | 🇩🇰 Denmark | Brøndby |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx1.startmail.com | 145.131.90.133 2a02:22a0:bbb6:1d00::1001:25 |
mx1.startmail.com mx1.startmail.com |
AS28685 Routit BV AS28685 Routit BV |
| 10 | 3600s | mx2.startmail.com | 145.131.90.149 2a02:22a0:bbb6:1d00::1002:25 |
mx2.startmail.com mx2.startmail.com |
AS28685 Routit BV AS28685 Routit BV |
| TXT Record |
|---|
| startmail-verification=99e0a58636641a794f95422773b28615 |
| v=spf1 include:spf.startmail.com ~all |
| Policy | Record (jonasbruus.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.startmail.com ~all |
| www CNAME | jonasbruus.dk (all on jonasbruus.dk) → 91.100.45.17 (AS15516) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.startmail.com | DANE-EE · Full cert · SHA-256 | DC2B92762A99D3F70951B81DB11572DA… |
| SMTP _25._tcp.mx2.startmail.com | DANE-EE · Full cert · SHA-256 | DC2B92762A99D3F70951B81DB11572DA… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 00:40:24 shown | 2227ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-09 12:23:54 | 1802ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-04 00:35:23 | 732ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-02 07:06:35 | 1082ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-28 06:41:20 | 1263ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-11 11:29:10 | 939ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-28 09:49:15 | 868ms | 4 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-18 00:34:07 | 721ms | 4 NS 1 A 2 MX | 🔒 Secure |