seldenmast.dk is a .dk domain served by 4 nameservers (ns1-08.azure-dns.com, ns2-08.azure-dns.net, ns3-08.azure-dns.org and 1 more). It was registered on 9 November 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 213.136.57.250 is hosted by Bahnhof AB (AS8473) in Sweden. Mail is handled by seldenmast-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 |
|---|---|---|---|---|---|---|---|
| 213.136.57.250 | 14400s | 250.248-28.136.213.in-addr.arpa | AS8473 | Bahnhof AB | 213.136.32.0/19 | 🇸🇪 Sweden | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| hWeNqxxR2SST2rl/2BY6Wsj7jh4q+mU2XtwZvOStMQE3B3Qn6pBgDCkpjXQx3MyYNl6KPJmo71wR4bYs8oZ1OA== |
| MS=ms47288124 |
| v=spf1 include:spf.protection.outlook.com ip4:213.136.57.250 -all |
| Policy | Record (seldenmast.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com ip4:213.136.57.250 -all |
| Policy | Record (_dmarc.seldenmast.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc-reports@Selden.onmicrosoft.com |
| www | 213.136.57.250 (AS8473) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-seldenmast-dk._domainkey.selden.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: 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 | 2026042201 |
| Primary NS (MNAME) | ns1-08.azure-dns.com |
| Responsible (RNAME) | systeminfo@helpdesk.webland.se |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Name SRS AB |
| Registered | 1999-11-09 |
| Expires | 2026-12-31 (69d) |
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).
| Domain | Registrar |
|---|---|
| furlex.dk | Name SRS AB |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-06-22 11:42:49 | 984ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 17:20:44 shown | 1063ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 00:09:52 | 1096ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-19 13:29:47 | 1129ms | 4 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-17 13:51:02 | 3263ms | 4 NS 1 A 1 MX | 🔓 Insecure |