jonasalbertsen.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 2.105.2.200 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by jonasalbertsen-dk.mail.protection.outlook.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 this 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 |
|---|---|---|---|---|---|---|---|
| 2.105.2.200 | 3600s | 2-105-2-200-cable.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 2.104.0.0/14 | 🇩🇰 Denmark | Silkeborg |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.56 |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (jonasalbertsen.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | 2.105.2.200 (AS3292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026061101 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-26 12:30:26 | 631ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-21 23:17:49 | 1725ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-15 09:45:10 | 1135ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-26 16:17:42 | 899ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 13:53:33 | 690ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-20 13:31:49 | 8410ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-11 07:36:56 | 6614ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-12 21:19:18 | 3393ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-30 16:07:41 shown | 760ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-26 05:33:03 | 3514ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 02:06:11 | 976ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 00:20:03 | 3713ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 00:07:28 | 3753ms | 2 NS 1 A 1 MX | 🔒 Secure |