nikolajholck.dk is a .dk domain served by 2 nameservers (elle.ns.cloudflare.com, todd.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 88.218.3.190 is hosted by M247 Europe SRL (AS9009) in Denmark. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 88.218.3.190 | 60s | — | AS9009 | M247 Europe SRL | 88.218.0.0/22 | 🇩🇰 Denmark | Copenhagen |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a0d:5600:1a:26::2 | 60s | — | AS9009 | M247 Europe SRL | 2a0d:5600:1a:0:0:0:0:0/47 | 🇩🇰 Denmark | Copenhagen |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h2,http/1.1" ipv4hint=88.218.3.190 ipv6hint=2a0d:5600:1a:26::2 |
| TXT Record |
|---|
| protonmail-verification=0b63f9ee8a77346f7c6ab1637dca785026fcc8c6 |
| v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (nikolajholck.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (_dmarc.nikolajholck.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | 104.21.45.181 172.67.218.3 2606:4700:3034::6815:2db5 2606:4700:3036::ac43:da03 (AS13335) (address records, no CNAME) |
| www vs bare domain | Different networks nikolajholck.dk: 88.218.3.190 2a0d:5600:1a:26::2 (AS9009) (all like this)www.nikolajholck.dk: 104.21.45.181 172.67.218.3 2606:4700:3034::6815:2db5 2606:4700:3036::ac43:da03 (AS13335) |
| Wildcard | No |
DNS lookups: 2/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2415455662 |
| Primary NS (MNAME) | elle.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-24 11:28:06 shown | 9624ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-23 19:47:09 | 881ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-27 04:38:13 | 1226ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-25 11:02:48 | 1011ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-27 15:54:37 | 1347ms | 2 NS 1 A 2 MX | ❓ Unknown |
| 2026-07-24 13:37:53 | 10681ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-23 10:29:54 | 2131ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-24 17:55:49 | 514ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 12:23:04 | 1003ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 13:19:56 | 2574ms | 2 NS 1 A 2 MX | 🔒 Secure |