nssf.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 185.21.41.231 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by nssf-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 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 |
|---|---|---|---|---|---|---|---|
| 185.21.41.231 | 3600s | linux30.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.152 |
| 🔶 Autoconfig | 162.159.134.42 |
| TXT Record |
|---|
| ca3-f20667ab351647989b6e78ff743e9e66 |
| MS=ms67325664 |
| v=spf1 a mx include:spf.protection.outlook.com include:relay.kinstamailservice.com ip4:35.198.171.251 ~all |
| Policy | Record (nssf.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a mx include:spf.protection.outlook.com include:relay.kinstamailservice.com ip4:35.198.171.251 ~all |
| Policy | Record (_dmarc.nssf.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 185.21.41.231 (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 |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u46528827.wl078.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u46528827.wl078.sendgrid.net | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 4/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.nssf.dk | nssf.dk.kinstavalidation.app |
| TXT | nssf.dk.kinstavalidation.app | 2oEodrw60Jc6r6Rcvnn6JCjUEAk5gePcHswLU51VH2k |
| TXT | nssf.dk.kinstavalidation.app | RO0S7TkbGx0UjHFNXnU3lgCWZg_Ry6NkeC2DzErnNnQ |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026093000 |
| 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 |
|---|---|---|---|
| 2026-10-09 13:53:14 shown | 1007ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-01 12:14:34 | 940ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-30 17:44:06 | 1231ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 05:13:32 | 927ms | 4 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-22 07:09:35 | 935ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 04:35:15 | 3839ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 13:55:20 | 2369ms | 4 NS 1 A 1 MX | 🔒 Secure |