opkurser.dk is a .dk domain served by 2 nameservers (ns1.vercel-dns.com, ns2.vercel-dns.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.150.1.193 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by opkurser-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 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 |
|---|---|---|---|---|---|---|---|
| 216.150.1.193 | — | — | AS16509 | Amazon.com, Inc. | 216.150.1.0/24 | 🇺🇸 United States | — |
| 216.150.1.65 | — | — | AS16509 | Amazon.com, Inc. | 216.150.1.0/24 | 🇺🇸 United States | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| 🔶 Autoconfig | 216.150.16.193 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| google-site-verification=fbf7p5oItdoP6VCDZotSoq420oAusAgEYhu9jgmwkYE |
| k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrLHiExVd55zd/IQ/J/mRwSRMAocV/hMB3jXwaHH36d9NaVynQFYV8NaWi69c1veUtRzGt7yAioXqLj7Z4TeEUoOLgrKsn8YnckGs9i3B3tVFB+Ch/4mPhXWiNfNdynHWBcPcbJ8kjEQ2U8y78dHZj1YeRXXVvWob2OaKynO8/lQIDAQAB; |
| v=spf1 include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com include:spf.dynamicweb-cms.com include:amazonses.com -all |
| Policy | Record (opkurser.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:servers.mcsv.net include:spf.mandrillapp.com include:spf.dynamicweb-cms.com include:amazonses.com -all |
| Policy | Record (_dmarc.opkurser.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; rua=mailto:re+q85ijlgmrud@dmarc.postmarkapp.com; sp=none; aspf=r; |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog |
| 0 | issue | sectigo.com |
| www | 216.150.1.193 216.150.16.193 (AS16509) (address records, no CNAME) |
| www vs bare domain | Same network opkurser.dk: 216.150.1.1 216.150.1.65 (AS16509) www.opkurser.dk: 216.150.1.193 216.150.16.193 (AS16509) |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| k1 | dkim.mcsv.net | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-opkurser-dk._domainkey.opkurser.onmicrosoft.com | RSA · ~1024 bit below 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: 7/10 · 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 | 1756127842 |
| Primary NS (MNAME) | ns1.vercel-dns.com |
| Responsible (RNAME) | hostmaster@nsone.net |
| Refresh | 43200s |
| Retry | 7200s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 21:18:37 | 1398ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 18:42:50 | 1125ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-28 06:46:43 | 1228ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-21 16:41:32 | 1589ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-07 06:34:15 | 1005ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 11:26:12 | 1435ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 18:20:00 | 1125ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-25 11:02:40 | 1202ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-22 01:55:59 | 1081ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-18 03:35:05 shown | 1414ms | 2 NS 2 A 1 MX | 🔓 Insecure |