holteninstitute.dk is a .dk domain served by 3 nameservers (dns1.oderland.com, dns2.oderland.com, dns3.oderland.com). It was registered on 24 February 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 91.201.60.85 is hosted by ODERLAND Webbhotell AB (AS44136) in Sweden. Mail is handled by mx1.oderland.com, mx2.oderland.com and 2 more. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 91.201.60.85 | 7200s | premium20.oderland.com | AS44136 | ODERLAND Webbhotell AB | 91.201.60.0/22 | 🇸🇪 Sweden | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:28f0:304a:20:: | 7200s | premium20.oderland.com | AS44136 | ODERLAND Webbhotell AB | 2a02:28f0:0:0:0:0:0:0/29 | 🇸🇪 Sweden | — |
| TXT Record |
|---|
| v=spf1 ip4:91.201.60.85 +a +mx +include:_vsp.oderland.com ~all |
| Policy | Record (holteninstitute.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:91.201.60.85 +a +mx +include:_vsp.oderland.com ~all |
| Policy | Record (_dmarc.holteninstitute.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www CNAME | holteninstitute.dk (all on holteninstitute.dk) |
| www vs bare domain | Same network holteninstitute.dk: 91.201.60.85 2a02:28f0:304a:20:: (AS44136) www.holteninstitute.dk: 91.201.60.85 2a02:28f0:304a:20:: (AS44136) |
| Wildcard | No |
DNS lookups: 3/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.holteninstitute.dk | xCm-7LaRKWvnZ8xlsEKktY4BTZeniQ-RdYs4cTwTtoo |
| 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 | 2026072502 |
| Primary NS (MNAME) | dns1.oderland.com |
| Responsible (RNAME) | registry@oderland.se |
| Refresh | 3600s |
| Retry | 7200s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Abion AB |
| Registered | 2016-02-24 |
| Expires | 2027-02-28 (123d) |
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 |
|---|---|---|---|
| 2026-10-01 06:53:37 | 797ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-24 17:33:21 | 923ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-09-19 17:40:23 | 756ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-07-25 06:50:10 shown | 2008ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-27 13:57:28 | 891ms | 3 NS 1 A 4 MX | 🔓 Insecure |
| 2026-06-23 16:35:49 | 1139ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 14:22:31 | 269ms | 0 NS 0 A 0 MX | ❓ Unknown |