seoday.dk is a .dk domain served by 2 nameservers (burt.ns.cloudflare.com, tegan.ns.cloudflare.com). It was registered on 11 August 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.7.79 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.simply.com. The zone is not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 104.21.7.79 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.135.226 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 172.67.135.226 |
| 🔶 Autoconfig | 104.21.7.79 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:87e2 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3036::6815:74f | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.7.79,172.67.135.226 ech=AEX+DQBBEQAgACC0s3chcToHsvDPwtwzTTx2+ZRdTuaMwSiAGyShPi4YTAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:87e2,2606:4700:3036::6815:74f |
| www | 104.21.7.79 172.67.135.226 2606:4700:3033::ac43:87e2 2606:4700:3036::6815:74f (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| 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 | 2411507216 |
| Primary NS (MNAME) | burt.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2015-08-11 |
| Expires | 2028-08-31 (675d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 19:37:51 | 2465ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-09 07:34:31 | 1530ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 18:54:07 | 769ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-08 05:08:36 shown | 1558ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-12 00:53:46 | 909ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-24 01:46:00 | 834ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-20 03:41:41 | 670ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-18 08:27:31 | 2940ms | 2 NS 2 A 1 MX | 🔓 Insecure |