formulamicrohosting.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 83.91.91.15 is hosted by TDC Holding A/S (AS3292) in Denmark. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 83.91.91.15 | 3600s | 83-91-91-15-static.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 83.90.0.0/15 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | formulamicrohosting.dk → 83.91.91.15 |
| 🔶 Autoconfig | formulamicrohosting.dk → 83.91.91.15 |
| TXT Record |
|---|
| v=spf1 ip4:83.91.91.0/26 -all |
| Policy | Record (formulamicrohosting.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:83.91.91.0/26 -all |
| Policy | Record (_dmarc.formulamicrohosting.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; rua=mailto:dmarcreports@scanmail.nu; |
| www CNAME | formulamicrohosting.dk (all on formulamicrohosting.dk) → 83.91.91.15 (AS3292) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.formulamicrohosting.dk | formulamicrohosting.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026030501 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 23:50:30 shown | 540ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-30 12:13:56 | 493ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-09-03 05:38:15 | 602ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-08-25 18:15:08 | 498ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-27 23:24:09 | 557ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-24 05:09:55 | 3481ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-23 15:54:12 | 1095ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-23 13:52:14 | 1165ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 10:29:54 | 408ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-17 10:29:16 | 862ms | 2 NS 1 A 0 MX | 🔒 Secure |
| 2026-06-17 10:26:44 | 5362ms | 2 NS 1 A 0 MX | 🔒 Secure |