rsmdk.dk is a .dk domain served by 2 nameservers (ns1.alco.dk, ns2.alco.dk). It was registered on 11 June 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.24.57.1 is hosted by Render (AS397273) in United States. Mail is handled by rsmdk-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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.alco.dk | 46.225.229.1 | ns1.alco.dk | AS24940 Hetzner Online GmbH |
| ns2.alco.dk | 89.167.94.156 | ns2.alco.dk | AS24940 Hetzner Online GmbH |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 216.24.57.1 | 3600s | ip-216-24-57-1.ingress.render.com | AS397273 | Render | 216.24.57.0/24 | 🇺🇸 United States | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| TXT Record |
|---|
| MS=ms92240135 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (rsmdk.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.rsmdk.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:DMARC@rsmdk.dk; ruf=mailto:DMARC@rsmdk.dk; fo=1; |
| www CNAME | rsmdk.dk (all on rsmdk.dk) → 216.24.57.1 (AS397273) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-rsmdk-dk._domainkey.brandtrevision.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 | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2025121815 |
| Primary NS (MNAME) | ns1.alco.dk |
| Responsible (RNAME) | hostmaster@alco.dk |
| Refresh | 28800s |
| Retry | 7200s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 43200s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2015-06-11 |
| Expires | 2027-06-30 (254d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-08-31 12:09:56 shown | 1392ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 06:16:25 | 1217ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 11:32:09 | 2727ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 04:34:51 | 4676ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-18 00:22:35 | 2321ms | 2 NS 1 A 1 MX | 🔓 Insecure |