f5-networking.dk is a .dk domain served by 2 nameservers (lady.ns.cloudflare.com, yahir.ns.cloudflare.com). It was registered on 17 September 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by f5networking-dk0e.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| lady.ns.cloudflare.com | — | — | — |
| yahir.ns.cloudflare.com | — | — | — |
| TXT Record |
|---|
| MS=ms73439792 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (f5-networking.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.f5-networking.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:rua+wics4w439z4j@dmarcwise.email; |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:rua+wics4w439z4j@dmarcwise.email |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves f5-networking.dk: no address www.f5-networking.dk: no address |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-f5networking-dk0e._domainkey.f5dk365.a-v1.dkim.mail.microsoft | RSA · ~2048 bit |
| selector2 | selector2-f5networking-dk0e._domainkey.f5dk365.a-v1.dkim.mail.microsoft | 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: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2405945265 |
| Primary NS (MNAME) | lady.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | CURANET A/S |
| Registered | 2020-09-17 |
| Expires | 2027-09-30 (348d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-29 22:53:31 | 2386ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-25 21:48:43 | 766ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-22 01:13:01 | 1737ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-28 08:46:19 | 1022ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-05 20:30:38 | 1703ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-07-21 13:19:18 | 3316ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-07-01 23:37:42 | 1330ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-17 09:10:36 shown | 1231ms | 2 NS 0 A 1 MX | 🔓 Insecure |