sentryline.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 12 December 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by sentryline-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 → 52.98.149.136 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| MS=ms47847536 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (sentryline.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.sentryline.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www | NXDOMAIN |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | resolution failed: ncache nxrrset |
| Field | Value |
|---|---|
| Serial | 2026100200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2023-12-12 |
| Expires | 2026-12-11 (69d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 19:15:09 shown | 1049ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-09-25 18:13:09 | 1180ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-08-27 09:19:46 | 976ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-07-02 16:27:34 | 2048ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-21 13:44:42 | 695ms | 3 NS 0 A 1 MX | 🔒 Secure |
| 2026-06-21 10:20:56 | 1168ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 12:21:05 | 3633ms | 3 NS 0 A 1 MX | 🔒 Secure |