2900hellerup.dk is a .dk domain served by 5 nameservers (ns1.gigahost.dk, ns2.gigahost.dk, ns3.gigahost.dk and 2 more). It was registered on 5 August 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.183.138.100 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by mx1.gigahost.dk, mx2.gigahost.dk and 1 more. The zone is not DNSSEC-signed, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 46.183.138.100 | 3599s | — | AS47292 | Sentia Denmark A/S | 46.183.138.0/23 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx1.gigahost.dk | 46.183.139.11 | mx1.gigahost.dk | AS47292 Sentia Denmark A/S |
| 10 | 3600s | mx2.gigahost.dk | 46.183.139.12 | mx2.gigahost.dk | AS47292 Sentia Denmark A/S |
| 10 | 3600s | mx3.gigahost.dk | 46.183.139.13 | mx3.gigahost.dk | AS47292 Sentia Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 2900hellerup.dk → 46.183.138.100 |
| 🔶 Autoconfig | 2900hellerup.dk → 46.183.138.100 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | autodiscover.gigahost.dk |
| TXT Record |
|---|
| spf2.0/pra |
| v=spf1 mx include:spf.gigahost.dk -all |
| Policy | Record (2900hellerup.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx include:spf.gigahost.dk -all |
| Policy | Record (_dmarc.2900hellerup.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; |
| www CNAME | 2900hellerup.dk (all on 2900hellerup.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.2900hellerup.dk | 2900hellerup.dk |
| 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 | 2026092401 |
| Primary NS (MNAME) | ns1.gigahost.dk |
| Responsible (RNAME) | hostmaster@2900hellerup.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | GIGAHOST ApS |
| Registered | 2023-08-05 |
| Expires | 2027-08-04 (291d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 04:30:00 | 1504ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-10-08 10:33:28 | 1463ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-10-01 07:13:57 | 1236ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-24 04:43:51 shown | 916ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-17 19:51:51 | 1319ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-14 02:35:40 | 779ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-09-07 00:30:58 | 1024ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-28 05:12:52 | 816ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-25 17:12:28 | 763ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-20 17:31:25 | 7398ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-13 15:27:02 | 1205ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-08-08 10:27:06 | 1100ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-31 04:44:58 | 9395ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-23 06:48:31 | 844ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-16 14:26:21 | 930ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-10 04:35:17 | 926ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-04 17:50:35 | 9936ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-27 04:45:46 | 2171ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-23 16:12:53 | 662ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-20 01:35:52 | 1911ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 13:21:52 | 9732ms | 5 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-16 13:13:01 | 923ms | 5 NS 1 A 3 MX | 🔓 Insecure |