rsst.dk is a .dk domain served by 2 nameservers (bella.ns.cloudflare.com, sterling.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by rsst-dk.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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.136 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms41164447 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (rsst.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.rsst.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves rsst.dk: no address www.rsst.dk: no address |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-rsst-dk._domainkey.stokholmjensen.onmicrosoft.com | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-rsst-dk._domainkey.stokholmjensen.onmicrosoft.com | 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 | 2416951779 |
| Primary NS (MNAME) | bella.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 22:47:38 shown | 1424ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-29 22:00:36 | 832ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-29 23:58:15 | 2250ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-08-07 16:44:01 | 1842ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-07-03 10:55:42 | 2821ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-26 14:33:09 | 1010ms | 2 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-17 11:39:19 | 2469ms | 2 NS 0 A 1 MX | 🔓 Insecure |