xtension.dk is a .dk domain served by 2 nameservers (danica.ns.cloudflare.com, sri.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 2.106.187.13 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by mail.brygger.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 2.106.187.13 | 300s | 2-106-187-13-cable.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 2.104.0.0/14 | 🇩🇰 Denmark | Bagsværd |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mail.brygger.dk | 172.232.141.241 | mail.brygger.dk | AS63949 Akamai Connected Cloud |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | mail.brygger.dk → 172.232.141.241 |
| 🔶 Autoconfig | mail.brygger.dk → 172.232.141.241 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 1 | 443 | mail.brygger.dk |
| _imap._tcp | 0 | 1 | 143 | mail.brygger.dk |
| _imaps._tcp | 0 | 1 | 993 | mail.brygger.dk |
| TXT Record |
|---|
| v=spf1 ip4:172.232.141.241 -all |
| Policy | Record (xtension.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:172.232.141.241 -all |
| Policy | Record (_dmarc.xtension.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;rua=mailto:dmarc@xtension.dk;ruf=mailto:dmarc@xtension.dk;adkim=s;aspf=s |
| www CNAME | xtension.dk (all on xtension.dk) → 2.106.187.13 (AS3292) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | 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: 0/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.brygger.dk | DANE-EE · SPKI · SHA-256 | 3391386CB0EB79092A16769A3F3D46AF… |
| 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 | 2417478243 |
| Primary NS (MNAME) | danica.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-15 02:52:30 shown | 460ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-01 18:30:27 | 1930ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 18:15:18 | 717ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-23 16:14:19 | 689ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-08 11:44:33 | 3792ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-31 23:13:11 | 580ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-30 19:03:34 | 1638ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 21:01:19 | 698ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-26 14:25:50 | 2740ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-25 02:29:57 | 9864ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-20 23:45:00 | 10459ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-13 01:54:09 | 808ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-30 14:25:06 | 985ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-26 03:45:57 | 1205ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 17:23:22 | 863ms | 2 NS 1 A 1 MX | 🔓 Insecure |