mrb2b.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 185.31.79.5 is hosted by DLX A/S (AS47527) in Denmark. Mail is handled by mxcloud1.simitu.dk, mxcloud2.simitu.dk and 1 more. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 185.31.79.5 | 3600s | v4-elastic-ingress.balancer01.hyperscalemega.cloud | AS47527 | DLX A/S | 185.31.76.0/22 | 🇩🇰 Denmark | Herning |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mxcloud1.simitu.dk | — | — | — |
| 10 | 3600s | mxcloud2.simitu.dk | — | — | — |
| 10 | 3600s | mxcloud3.simitu.dk | — | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | customerautodiscover.sotea.dk → 193.200.225.39 |
| 🔶 Autoconfig | 195.69.131.42 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 1 | 0 | 443 | autodiscover.sotea.dk |
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| v=spf1 a mx a:massmail.scannet.dk a:mailmailmail.net include:spf.scannet.dk ip4:193.200.225.0/24 ip4:81.7.136.170 include:spf.magepartner.net -all |
| Policy | Record (mrb2b.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx a:massmail.scannet.dk a:mailmailmail.net include:spf.scannet.dk ip4:193.200.225.0/24 ip4:81.7.136.170 include:spf.magepartner.net -all |
| www | 185.31.79.5 (AS47527) (address records, no CNAME) |
| 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 |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~1024 bit below 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: 10/10 · policy: -all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2021111701 |
| 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 |
|---|---|---|---|
| 2026-09-05 05:32:23 shown | 481ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-22 22:19:23 | 1039ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-17 14:43:42 | 1242ms | 2 NS 1 A 3 MX | 🔒 Secure |