vsbv.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 20.50.64.21 is hosted by Microsoft Corporation (AS8075) in Ireland. Mail is handled by vsbv-dk.g-v1.mx.microsoft. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 20.50.64.21 | — | — | AS8075 | Microsoft Corporation | 20.48.0.0/12 | 🇮🇪 Ireland | Dublin |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | autodiscover.kalundborg.dk |
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| c7j415xkcnqm4crjjqb54m9m4xwp3ynf |
| cbvd2mmgeat6k02uq1rbc8mjp9 |
| d/VCuRAyQLxR1Y1A3vBOLeg13O3AAlzyRcSQq10lwufU+PNuKVAnpBgNBAdLzY2T+nEfCFaDqdqEWKV105wj/A== |
| MS=ms21102148 |
| v=spf1 include:_spf22870.spfprotect.com -all |
| W1g7BVEIw0JrwlmwTa6ad5u4VpwBxPRfh+2zhlScXDs0jy7B5bSmEfbfi+xFtmlrlraJbmQQB89HkXy94a4EIg== |
| Policy | Record (vsbv.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf22870.spfprotect.com -all |
| Policy | Record (_dmarc.vsbv.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; rua=mailto:64995bbde9629@dmarc.centerasecurity.com; ruf=mailto:dmarc@kalundborg.dk; |
| www | 20.50.64.21 (AS8075) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u5473285.wl036.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u5473285.wl036.sendgrid.net | 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: 4/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.vsbv-dk.g-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | 5F88694615E4C61686E106B84C3338C6… |
| SMTP _25._tcp.vsbv-dk.g-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | 6EBFF927297A5B3AAF5EAE672252C36A… |
| SMTP _25._tcp.vsbv-dk.g-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | 133086C7B822371A4A3304F1661A7880… |
| SMTP _25._tcp.vsbv-dk.g-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | A6C267923B26A4A9617EDA73D8DB4FBC… |
| SMTP _25._tcp.vsbv-dk.g-v1.mx.microsoft | DANE-EE · SPKI · SHA-256 | C495D9E40F7E625BE22F83CC64305182… |
| SMTP _25._tcp.vsbv-dk.g-v1.mx.microsoft | DANE-TA · Full cert · SHA-256 | 38D895F5105BC2545822C17A2444F4B0… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025090101 |
| Primary NS (MNAME) | ns.dandomain.dk |
| Responsible (RNAME) | hostmaster@dandomain.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 09:58:13 | 474ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-08 16:27:22 | 671ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-25 19:21:45 | 728ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 10:20:38 | 685ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 07:00:59 shown | 1015ms | 2 NS 1 A 1 MX | 🔒 Secure |