fiber-by.dk is a .dk domain served by 4 nameservers (authns1.fiberby.net, authns2.fiberby.net, authns3.fiberby.net and 1 more). It was registered on 3 March 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.104.135.126 is hosted by Fiberby ApS (AS42541) in Denmark. Mail is handled by mail.fiberby.dk. The zone is of unknown DNSSEC status, has no 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 |
|---|---|---|---|---|---|---|---|
| 193.104.135.126 | 900s | web1.fiberby.net | AS42541 | Fiberby ApS | 193.104.135.0/24 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | mail.fiberby.dk | 193.106.165.197 | 193-106-165-197.ip4.fiberby.net | AS42541 Fiberby ApS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | fiber-by.dk → 193.104.135.126 |
| 🔶 Autoconfig | fiber-by.dk → 193.104.135.126 |
| www CNAME | fiber-by.dk (all on fiber-by.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.fiber-by.dk | fiber-by.dk |
| Check | Result |
|---|---|
| Validation Status | ❓ Unknown |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: failure |
| Field | Value |
|---|---|
| Serial | 2020013000 |
| Primary NS (MNAME) | authns1.fiberby.net |
| Responsible (RNAME) | hostmaster@fiberby.net |
| Refresh | 43200s |
| Retry | 1800s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2015-03-03 |
| Expires | 2027-03-31 (163d) |
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).
| Domain | Registrar |
|---|---|
| fiberby.dk | Punktum dk A/S (direct) |
| fiberbypost.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 03:43:21 | 1152ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-29 17:18:12 | 579ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-28 09:42:17 | 1434ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-26 19:17:21 | 18772ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-28 01:37:29 | 1984ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 15:10:37 | 4202ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-22 09:05:47 | 918ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-21 19:36:09 | 763ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 23:39:06 | 3368ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 05:30:15 shown | 1473ms | 4 NS 1 A 1 MX | ❓ Unknown |
| 2026-06-17 09:46:47 | 707ms | 4 NS 1 A 1 MX | 🔓 Insecure |