optimernu.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.238 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by optimernu-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 93.191.156.238 | 3600s | linux327.unoeuro.com | AS48854 | team.blue Denmark A/S | 93.191.152.0/21 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.98.16.63 |
| 🔶 Autoconfig | 93.191.156.238 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms63294601 |
| v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all |
| Policy | Record (optimernu.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all |
| Policy | Record (_dmarc.optimernu.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www | 93.191.156.238 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · 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 | 2025042300 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-07 20:01:24 | 1087ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 22:23:25 | 799ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 22:17:38 | 771ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 11:25:52 | 1178ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-04 17:53:33 shown | 1862ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 21:04:23 | 682ms | 4 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-17 18:55:25 | 4823ms | 4 NS 1 A 1 MX | 🔒 Secure |