extremagent.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 26 June 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.28 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1.pub.mailpod12-cph3.one.com, mx2.pub.mailpod12-cph3.one.com and 2 more. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 185.21.40.28 | 600s | vm1413.enterprisecloud.nu | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 10800s | mx1.pub.mailpod12-cph3.one.com | 104.37.34.246 | mx1.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx2.pub.mailpod12-cph3.one.com | 104.37.34.247 | mx2.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx3.pub.mailpod12-cph3.one.com | 104.37.34.248 | mx3.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| 10 | 10800s | mx4.pub.mailpod12-cph3.one.com | 104.37.34.249 | mx4.pub.mailpod12-cph3.one.com | AS51468 One.com A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 185.21.40.28 |
| 🔶 Autoconfig | 185.21.40.28 |
| TXT Record |
|---|
| v=spf1 include:_custspf.one.com include:web.shared.mysmtp.com -all |
| Policy | Record (extremagent.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_custspf.one.com include:web.shared.mysmtp.com -all |
| www | 185.21.40.28 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
DNS lookups: 5/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| SMTP _25._tcp.mx2.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| SMTP _25._tcp.mx3.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| SMTP _25._tcp.mx4.pub.mailpod12-cph3.one.com | DANE-EE · SPKI · SHA-256 | 3E81C76D10E1A717F28178710EADCAA8… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026071805 |
| 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 | ONE.COM A/S |
| Registered | 2017-06-26 |
| Expires | 2027-06-30 (255d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 06:21:09 | 511ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-30 20:09:18 | 538ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-20 08:38:58 | 910ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-09-01 12:48:33 | 628ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-08-27 02:15:44 shown | 2631ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-19 23:54:31 | 9047ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-07-18 17:23:36 | 8788ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-27 00:47:31 | 694ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-26 14:30:55 | 681ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-23 22:35:35 | 2642ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-23 05:59:28 | 1190ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 04:06:33 | 719ms | 2 NS 1 A 4 MX | 🔒 Secure |
| 2026-06-17 09:10:01 | 1532ms | 2 NS 1 A 4 MX | 🔒 Secure |