systematic.dk is a .dk domain served by 2 nameservers (rajeev.ns.cloudflare.com, selah.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.64.205 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by systematic-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 |
|---|---|---|---|---|---|---|---|
| 104.21.64.205 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.155.211 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::ac43:9bd3 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:40cd | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.64.205,172.67.155.211 ech=AEX+DQBBPQAgACC2cKdyzR1g9uSP9jGOA4Gr+wGoPegoATCstrF4W9bETAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:9bd3,2606:4700:3035::6815:40cd |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (systematic.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.systematic.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:DMARCAdmin@systematic.com |
| www | 104.21.64.205 172.67.155.211 2606:4700:3034::ac43:9bd3 2606:4700:3035::6815:40cd (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network systematic.dk: 104.21.64.205 172.67.155.211 2606:4700:3034::ac43:9bd3 2606:4700:3035::6815:40cd (AS13335) www.systematic.dk: 104.21.64.205 172.67.155.211 2606:4700:3034::ac43:9bd3 2606:4700:3035::6815:40cd (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-systematic-dk._domainkey.systematic.onmicrosoft.com | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-systematic-dk._domainkey.systematic.onmicrosoft.com | 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| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.systematic.dk | RH0p1QYpoM_TvkX6xt3cA5j59PEdjDAguzx9rxaLGOg |
| TXT | _acme-challenge.systematic.dk | iGx7ijBQ0YMreH4U_P6xcxwnQ8cIZl6Mm8vOZwoea5M |
| 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 | 2417635580 |
| Primary NS (MNAME) | rajeev.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-18 14:28:50 | 955ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-17 12:41:20 shown | 1916ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-05 21:50:31 | 1706ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 21:36:32 | 1084ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-13 17:43:31 | 1915ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-28 10:50:26 | 1475ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 10:41:37 | 1468ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 09:34:50 | 1089ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-18 09:28:48 | 5238ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-17 03:46:25 | 11369ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-13 00:57:25 | 2499ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-25 19:48:23 | 2172ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-19 23:24:35 | 3065ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-18 02:17:59 | 1116ms | 2 NS 2 A 1 MX | 🔓 Insecure |