jacobsen.dk is a .dk domain served by 2 nameservers (sage.ns.cloudflare.com, veronica.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 68.183.243.94 is hosted by DigitalOcean, LLC (AS14061) in Germany. Mail is handled by mx.dka.mailcore.net. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 68.183.243.94 | 300s | — | AS14061 | DigitalOcean, LLC | 68.183.0.0/16 | 🇩🇪 Germany | Frankfurt am Main |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 68.183.243.94 |
| 🔶 Autoconfig | 68.183.243.94 |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | autodiscover.jacobsen.dk |
| _imaps._tcp | 10 | 10 | 993 | imap.jubii.dk |
| TXT Record |
|---|
| v=spf1 include:spf.lytzenitmail.dk include:spf.mailcore.net ip4:212.242.40.0/21 -all |
| Policy | Record (jacobsen.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.lytzenitmail.dk include:spf.mailcore.net ip4:212.242.40.0/21 -all |
| Policy | Record (_dmarc.jacobsen.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; adkim=s; aspf=s; fo=1; sp=reject; ruf=mailto:postmaster@jacobsen.dk; rua=mailto:50603e2620a54c398e450eb0e20c544f@dmarc-reports.cloudflare.net; |
| Check | Result |
|---|---|
| Status | ⚠️ Invalid |
| TXT record (_mta-sts) | ✓ Found |
| HTTPS policy | ✗ Missing / invalid |
| Policy ID | 20260925000000 |
| Policy MX | — |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:tlsrpt@inbox.com |
| Flags | Tag | Value |
|---|---|---|
| 128 | iodef | mailto:caa.iodef@inbox.com |
| 128 | issue | letsencrypt.org |
| www | 68.183.243.94 (AS14061) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.dka.mailcore.net | DANE-EE · SPKI · SHA-256 | 40F9D37C5916C036178AC4588F4425C9… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417637180 |
| Primary NS (MNAME) | sage.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-17 01:22:55 shown | 1917ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 10:19:52 | 6513ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 06:56:04 | 1228ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-28 06:16:10 | 1135ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 05:58:20 | 909ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 04:54:13 | 930ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 13:17:28 | 1083ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-19 04:52:05 | 1365ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-12 03:19:00 | 2780ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-03 13:08:37 | 1306ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-31 10:01:41 | 4671ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-29 12:37:18 | 3358ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-25 21:32:50 | 3858ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 19:13:10 | 2050ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 15:28:46 | 1174ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 04:15:42 | 1932ms | 2 NS 1 A 1 MX | 🔓 Insecure |