matem.dk is a .dk domain served by 2 nameservers (arturo.ns.cloudflare.com, deb.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.26.230 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by matem-dk.mail.protection.outlook.com. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.26.230 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.168.146 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| 🔶 Autoconfig | 172.67.168.146 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::6815:1ae6 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:a892 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.26.230,172.67.168.146 ech=AEX+DQBB+gAgACCZIs0A2mSEmiTaI299zIW6ud0dN2IyDm+ZGm8KAt1UUwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:1ae6,2606:4700:3037::ac43:a892 |
| TXT Record |
|---|
| brevo-code:5211c0b8675bb50061af39e014887dd0 |
| MS=ms63282503 |
| v=spf1 include:spf.protection.outlook.com include:spf.brevo.com -all |
| Policy | Record (matem.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:spf.brevo.com -all |
| Policy | Record (_dmarc.matem.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com |
| www | 104.21.26.230 172.67.168.146 2606:4700:3034::6815:1ae6 2606:4700:3037::ac43:a892 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-matem-dk._domainkey.matemaps21.a-v1.dkim.mail.microsoft | RSA · ~2048 bit |
| selector2 | selector2-matem-dk._domainkey.matemaps21.a-v1.dkim.mail.microsoft | 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: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.matem.dk | onP08XSBgr4gV0x3DpLoS9_2L_SVaqOeBHu8EjwMSgo |
| TXT | _acme-challenge.matem.dk | rMmabw-eNL22I75BgxsTjGDB4ieGzq7oXDFLzgL7YMk |
| 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 | 2412677896 |
| Primary NS (MNAME) | arturo.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 04:14:41 | 1097ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 08:26:44 | 1187ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-27 06:54:38 | 964ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-07 22:20:11 | 1855ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-31 19:17:50 | 1670ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-22 06:58:45 | 2761ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-20 04:55:12 shown | 6312ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-03 05:20:53 | 1293ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-25 10:13:42 | 4222ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 20:34:34 | 1665ms | 2 NS 2 A 1 MX | 🔓 Insecure |