nk-udlejning.dk is a .dk domain served by 2 nameservers (barbara.ns.cloudflare.com, justin.ns.cloudflare.com). It was registered on 24 March 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.89.221 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.89.221 | 600s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.191.140 | 600s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | 3600s | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover-mf.onlinemail.io → 185.21.40.62 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:bf8c | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::6815:59dd | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.89.221,172.67.191.140 ech=AEX+DQBBiAAgACBwbx4SwxktTDRrMnb/gaZ3f4rxQ+DXlawREe9O03hYMwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:bf8c,2606:4700:3032::6815:59dd |
| TXT Record |
|---|
| v=spf1 a include:spf.curanet.dk ~all |
| v=spf1 a mx ~all |
| Policy | Record (nk-udlejning.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a include:spf.curanet.dk ~all |
| ~all (soft fail) | v=spf1 a mx ~all |
| www | 104.21.89.221 172.67.191.140 2606:4700:3031::ac43:bf8c 2606:4700:3032::6815:59dd (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network nk-udlejning.dk: 104.21.89.221 172.67.191.140 2606:4700:3031::ac43:bf8c 2606:4700:3032::6815:59dd (AS13335) www.nk-udlejning.dk: 104.21.89.221 172.67.191.140 2606:4700:3031::ac43:bf8c 2606:4700:3032::6815:59dd (AS13335) |
| Wildcard | No |
DNS lookups: 4/10 · policy: ~all
| 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 | 2406328148 |
| Primary NS (MNAME) | barbara.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 2025-03-24 |
| Expires | 2027-03-23 (150d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 00:30:23 | 521ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-04 03:08:00 | 1131ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-01 02:50:28 | 585ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-11 15:23:19 | 1561ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-02 17:35:14 | 771ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-07 19:29:53 | 1020ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-15 17:33:40 | 1806ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-25 10:39:41 shown | 1002ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-18 01:06:24 | 887ms | 2 NS 2 A 2 MX | 🔓 Insecure |