oldenborger.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 25 July 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.68.240.124 is hosted by Sinal A/S (AS39642) in Denmark. Mail is handled by mx1.jtranholm.com, mx3.jtranholm.com. 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 |
|---|---|---|---|---|---|---|---|
| 77.68.240.124 | 43200s | web3.jtranholm.com | AS39642 | Sinal A/S | 77.68.128.0/17 | 🇩🇰 Denmark | Frederikshavn |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | mx1.jtranholm.com | 185.101.97.24 2a06:1c80:1:70::932d |
web1.jtranholm.com gweb1.jtranholm.com |
AS60011 Mythic Beasts Ltd AS60011 Mythic Beasts Ltd |
| 10 | 43200s | mx3.jtranholm.com | 2001:470:28:6cc::1 77.68.240.124 |
web3.jtranholm.com web3.jtranholm.com |
AS6939 Hurricane Electric LLC AS39642 Sinal A/S |
| TXT Record |
|---|
| v=spf1 mx include:spf.smtp2go.com include:spf.jtranholm.com include:_spf.google.com ~all |
| Policy | Record (oldenborger.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx include:spf.smtp2go.com include:spf.jtranholm.com include:_spf.google.com ~all |
| Policy | Record (_dmarc.oldenborger.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:re+jn0ndzrdff2@dmarc.postmarkapp.com; pct=100; sp=reject; fo=1; |
| www | 77.68.240.124 (AS39642) (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 |
|---|---|---|
| default | — | RSA · ~2048 bit |
| — | 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| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026032501 |
| 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 | 2001-07-25 |
| Expires | 2027-09-30 (346d) |
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 |
|---|---|---|---|
| 2026-09-23 11:27:43 | 1977ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-21 04:39:19 shown | 4510ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-20 15:30:48 | 1163ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-17 13:00:45 | 8311ms | 2 NS 1 A 2 MX | 🔒 Secure |