semlernet.dk is a .dk domain served by 4 nameservers (ns1-09.azure-dns.com, ns2-09.azure-dns.net, ns3-09.azure-dns.org and 1 more). It was registered on 2 April 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by semlernet-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 → 52.98.149.136 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| _1y9b0yv83qw72w5b7qkpo7eyamlsezf |
| _yvq215ipsk5tdvd1qs7uumtwo6h6bas |
| jzbljg14cxmly0qrzkpl9jwchhz1y60j |
| MS=ms58056199 |
| rvjg92xlh536gykps38wx9vxrdwf0kns |
| v=spf1 mx ip4:195.249.218.0/24 ip4:20.107.82.163/32 include:spf.protection.outlook.com include:cust-spf.exacttarget.com include:mail.zendesk.com include:_spf-dc2.successfactors.com ~all |
| Policy | Record (semlernet.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx ip4:195.249.218.0/24 ip4:20.107.82.163/32 include:spf.protection.outlook.com include:cust-spf.exacttarget.com include:mail.zendesk.com include:_spf-dc2.successfactors.com ~all |
| Policy | Record (_dmarc.semlernet.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:tepx02da@ag.eu.dmarcadvisor.com; ruf=mailto:tepx02da@fr.eu.dmarcadvisor.com |
| www | NXDOMAIN |
| www vs bare domain | Neither resolves semlernet.dk: no address www.semlernet.dk: no address |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-semlernet-dk._domainkey.semler.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: 5/10 · 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 | 162 |
| Primary NS (MNAME) | ns1-09.azure-dns.com |
| Responsible (RNAME) | dnsadmin@kmd.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 43200s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2001-04-02 |
| Expires | 2027-06-30 (246d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 10:34:31 shown | 1095ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-30 20:06:14 | 980ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-24 23:03:11 | 1303ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-09-12 10:52:57 | 1398ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-25 13:38:06 | 3122ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-20 07:05:09 | 1130ms | 4 NS 0 A 1 MX | 🔓 Insecure |
| 2026-06-18 05:25:48 | 1110ms | 4 NS 0 A 1 MX | 🔓 Insecure |