gerstrom.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 31 May 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.106.189 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 5 more. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.one.com | — | — | — |
| ns02.one.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 94.231.106.189 | — | linux45.unoeuro.com | AS48854 | team.blue Denmark A/S | 94.231.96.0/20 | 🇩🇰 Denmark | — |
| TXT Record |
|---|
| v=spf1 include:_spf.google.com ~all |
| Policy | Record (gerstrom.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.google.com ~all |
| Policy | Record (_dmarc.gerstrom.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:nikolaj@gerstrom.dk; ruf=mailto:nikolaj@gerstrom.dk; fo=1 |
| www | 94.231.106.189 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| — | 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: 1/10 · policy: ~all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026060401 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1999-05-31 |
| Expires | 2027-06-30 (254d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-09 09:45:14 | 1070ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-10-06 00:07:13 | 3247ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-09-29 23:22:59 | 549ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-09-24 00:23:30 | 1269ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-09-06 21:29:19 | 957ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-08-14 07:56:17 | 17478ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-08-06 05:03:06 | 2087ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-07-05 20:50:14 | 10283ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-07-04 12:47:36 | 6980ms | 2 NS 1 A 7 MX | 🔒 Secure |
| 2026-06-21 22:12:13 | 697ms | 2 NS 1 A 7 MX | ⚠️ Bogus |
| 2026-06-17 09:39:53 shown | 2983ms | 2 NS 1 A 7 MX | 🔒 Secure |