rs-b.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 13 April 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.155.240 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by rsb-dk0e.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 93.191.155.240 | — | forward.dnsfactory.dk | AS48854 | team.blue Denmark A/S | 93.191.152.0/21 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| dropbox-domain-verification=wqkwvp4v29sj |
| v=spf1 include:spf.protection.outlook.com include:_custspf.one.com include:spf.curanet.dk -all |
| Policy | Record (rs-b.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:_custspf.one.com include:spf.curanet.dk -all |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 5/10 · 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 | 2023061501 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2016-04-13 |
| Expires | 2027-04-30 (186d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 13:04:07 | 1475ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-03 09:28:52 | 1018ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 11:50:08 | 669ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 11:14:19 | 738ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 19:17:22 | 745ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 05:36:01 | 927ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-19 16:23:41 | 6637ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 23:28:37 shown | 2047ms | 2 NS 1 A 1 MX | 🔒 Secure |