fischerbyg.dk is a .dk domain served by 2 nameservers (dylan.ns.cloudflare.com, sharon.ns.cloudflare.com). It was registered on 18 January 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.53.138 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by fischerbyg-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 104.21.53.138 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.213.99 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 104.21.53.138 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:358a | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:d563 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.53.138,172.67.213.99 ech=AEX+DQBBQAAgACDeUhm9EgJoBI1oXNpEUAjdAbpQlCQZo1Dfr17ldwK8HQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:358a,2606:4700:3034::ac43:d563 |
| TXT Record |
|---|
| autodiscover.outlook.com |
| MS=ms53282854 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (fischerbyg.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | 104.21.53.138 172.67.213.99 2606:4700:3033::6815:358a 2606:4700:3034::ac43:d563 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network fischerbyg.dk: 104.21.53.138 172.67.213.99 2606:4700:3033::6815:358a 2606:4700:3034::ac43:d563 (AS13335) www.fischerbyg.dk: 104.21.53.138 172.67.213.99 2606:4700:3033::6815:358a 2606:4700:3034::ac43:d563 (AS13335) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417310626 |
| Primary NS (MNAME) | dylan.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2019-01-18 |
| Expires | 2027-01-31 (106d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 09:03:43 shown | 3242ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-05 03:30:36 | 1240ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-03 03:00:14 | 1351ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-02 09:45:06 | 857ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-10-01 07:05:31 | 1210ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-29 22:37:21 | 1411ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-25 09:13:11 | 1844ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-20 02:28:39 | 3515ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-15 19:17:17 | 1870ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-26 13:21:38 | 813ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-10 00:30:18 | 5968ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-04 16:41:13 | 1864ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-18 07:05:06 | 5292ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-10 20:30:48 | 1434ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-02 10:30:54 | 2306ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-17 10:12:10 | 1489ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-17 10:05:43 | 7101ms | 2 NS 2 A 1 MX | 🔒 Secure |