brittaholberg.dk is a .dk domain served by 2 nameservers (pola.ns.cloudflare.com, sid.ns.cloudflare.com). It was registered on 15 June 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.38.163 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1-hosting.jellyfish.systems, mx2-hosting.jellyfish.systems and 1 more. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 104.21.38.163 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.136.117 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 5 | 300s | mx1-hosting.jellyfish.systems | 162.255.118.28 | oxse3a.privateemail.com | AS22612 Namecheap, Inc. |
| 10 | 300s | mx2-hosting.jellyfish.systems | 162.255.118.29 | oxse2b.privateemail.com | AS22612 Namecheap, Inc. |
| 20 | 300s | mx3-hosting.jellyfish.systems | 162.255.118.13 | mx3-hosting.jellyfish.systems | AS22612 Namecheap, Inc. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.38.163 |
| 🔶 Autoconfig | 104.21.38.163 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:8875 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:26a3 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.38.163,172.67.136.117 ech=AEX+DQBBmgAgACAf9ohn2Md78/HicdmqnvpTALJ0dSNRRoAGDTHvVWXdUQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:8875,2606:4700:3036::6815:26a3 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| v=spf1 +a +mx +ip4:66.29.132.73 include:spf.web-hosting.com ~all |
| Policy | Record (brittaholberg.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +a +mx +ip4:66.29.132.73 include:spf.web-hosting.com ~all |
| Policy | Record (_dmarc.brittaholberg.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 104.21.38.163 172.67.136.117 2606:4700:3033::ac43:8875 2606:4700:3036::6815:26a3 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network brittaholberg.dk: 104.21.38.163 172.67.136.117 2606:4700:3033::ac43:8875 2606:4700:3036::6815:26a3 (AS13335) www.brittaholberg.dk: 104.21.38.163 172.67.136.117 2606:4700:3033::ac43:8875 2606:4700:3036::6815:26a3 (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 9/10 · 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 | 2412067551 |
| Primary NS (MNAME) | pola.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Realtime Register B.V. |
| Registered | 2025-06-15 |
| Expires | 2027-06-14 (232d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
Showing 100 of 250.
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 17:29:26 | 2501ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-10-11 15:15:15 | 4087ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-18 01:11:57 | 1343ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-04 12:10:54 | 4967ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-23 04:19:44 | 8241ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-08-13 03:24:25 shown | 7416ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-02 13:05:58 | 3079ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-20 19:20:47 | 2835ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 17:11:41 | 2285ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 17:10:11 | 427ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 17:10:08 | 4501ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-16 17:00:29 | 2879ms | 2 NS 2 A 3 MX | 🔓 Insecure |