sisu.dk is a .dk domain served by 2 nameservers (jonah.ns.cloudflare.com, suzanne.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.43.213 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by sisu-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.43.213 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.185.231 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| 🔶 Autoconfig | 172.67.185.231 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3035::ac43:b9e7 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:2bd5 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.43.213,172.67.185.231 ech=AEX+DQBBVwAgACBYGi+NBGdDCG0Dpy2RJ3jtqpfP3nvmJWHup6tYM9HDZQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:b9e7,2606:4700:3036::6815:2bd5 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=msXXXXXXXX |
| v=spf1 include:spf.protection.outlook.com ip4:94.231.103.45 ~all |
| Policy | Record (sisu.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.protection.outlook.com ip4:94.231.103.45 ~all |
| Policy | Record (_dmarc.sisu.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:76488982ada04cc0ac3f7d9d1f36c969@dmarc-reports.cloudflare.net |
| www | 104.21.43.213 172.67.185.231 2606:4700:3035::ac43:b9e7 2606:4700:3036::6815:2bd5 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 1/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.sisu.dk | DsvJH2WB7fBclQhF0XXnMygmD_8c4A7d3_rZGgebDbI |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2413947673 |
| Primary NS (MNAME) | jonah.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-14 07:15:20 | 3687ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-30 15:45:45 | 1226ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-29 15:38:41 | 1559ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-24 03:27:15 | 1148ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-19 09:23:02 | 793ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-17 12:52:02 | 1623ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-10 12:12:34 shown | 1971ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-03 12:04:24 | 1076ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-31 09:43:20 | 3288ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-26 19:20:10 | 1083ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-07 08:34:18 | 1782ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-22 04:00:22 | 9465ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-21 03:24:59 | 9382ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-28 00:26:44 | 1005ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 19:17:37 | 922ms | 2 NS 2 A 1 MX | 🔓 Insecure |