erf01.dk is a .dk domain served by 4 nameservers (ns1-09.azure-dns.com, ns2-09.azure-dns.net, ns3-09.azure-dns.org and 1 more). It was registered on 6 March 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by .. The zone is not DNSSEC-signed, 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.
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 3600s | . Null MX — domain accepts no email (RFC 7505) | |||
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (erf01.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.erf01.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com,mailto:phishing@dnb.no |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves erf01.dk: no address www.erf01.dk: no address |
| Wildcard | No |
DNS lookups: 0/10 · 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 | 1 |
| Primary NS (MNAME) | ns1-09.azure-dns.com |
| Responsible (RNAME) | azuredns-hostmaster@microsoft.com |
| Refresh | 3600s |
| Retry | 300s |
| Expire | 2419200s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | CSC Digital Brand Service, Inc |
| Registered | 2017-03-06 |
| Expires | 2027-03-31 (159d) |
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).
| Domain | Registrar |
|---|---|
| autolease.dk | CSC Digital Brand Service, Inc |
| dnbfinans.dk | CSC Digital Brand Service, Inc |
| dnbidsolution.dk | CSC Digital Brand Service, Inc |
| idmee.dk | CSC Digital Brand Service, Inc |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-06-23 13:13:55 shown | 729ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-19 14:03:48 | 2552ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-17 08:29:11 | 4650ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-17 08:09:45 | 959ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-17 08:07:25 | 325ms | 4 NS 0 A 0 MX | 🔓 Insecure |
| 2026-06-17 08:00:31 | 401ms | 4 NS 0 A 0 MX | 🔓 Insecure |