grundstof.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 19 March 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.131 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 93.191.156.131 | 3600s | linux248.unoeuro.com | AS48854 | team.blue Denmark A/S | 93.191.152.0/21 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 93.191.156.131 |
| 🔶 Autoconfig | 93.191.156.131 |
| TXT Record |
|---|
| protonmail-verification=e5cb9169c912de9a3e7e4af6750d8b9804037a24 |
| v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (grundstof.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (_dmarc.grundstof.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | 93.191.156.131 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026101200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2005-03-19 |
| Expires | 2027-03-31 (165d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 23:48:18 shown | 479ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-04 08:06:58 | 583ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-01 08:02:19 | 812ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-28 00:15:08 | 9632ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-12 18:04:38 | 4107ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-07-10 07:09:55 | 1550ms | 3 NS 1 A 3 MX | 🔓 Insecure |
| 2026-07-08 17:05:14 | 904ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-06 12:34:13 | 669ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-23 21:11:34 | 1571ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 13:11:32 | 1122ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 05:00:21 | 1067ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 09:40:34 | 4674ms | 2 NS 1 A 1 MX | 🔒 Secure |