johnmast.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 24 February 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.111.240.137 is hosted by One.com A/S (AS51468) in Denmark. Mail is handled by johnmast-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 77.111.240.137 | 3600s | webcluster10.webpod11-cph3.one.com | AS51468 | One.com A/S | 77.111.240.0/22 | 🇩🇰 Denmark | Copenhagen |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.40 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:2350:5:102:48:50fd:f1e0:7555 | 3600s | — | AS51468 | One.com A/S | 2a02:2350:0:0:0:0:0:0/32 | 🇩🇰 Denmark | Copenhagen |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (johnmast.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| www | 77.111.240.137 2a02:2350:5:102:48:50fd:f1e0:7555 (AS51468) (address records, no CNAME) |
| www vs bare domain | Same network johnmast.dk: 77.111.240.137 2a02:2350:5:102:48:50fd:f1e0:7555 (AS51468) www.johnmast.dk: 77.111.240.137 2a02:2350:5:102:48:50fd:f1e0:7555 (AS51468) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
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 | 2026101501 |
| 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 | 1997-02-24 |
| Expires | 2027-03-31 (161d) |
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 |
|---|---|
| staging-johnmast.dk | ONE.COM A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 02:47:13 shown | 2517ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-21 08:03:09 | 1671ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-09 09:50:21 | 2134ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 08:49:09 | 1481ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-22 23:19:16 | 1400ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-15 22:48:38 | 9080ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-15 22:47:28 | 10220ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-11 10:59:44 | 1802ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-03 20:45:57 | 5465ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 10:05:49 | 1184ms | 2 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-18 01:47:04 | 999ms | 2 NS 1 A 1 MX | 🔒 Secure |