erlau.dk is a .dk domain served by 2 nameservers (cesar.ns.cloudflare.com, malavika.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.41.248 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx4.spamfri.dk. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.41.248 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.167.212 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 300s | mx4.spamfri.dk | 193.200.91.108 2001:67c:564:fffd::4001 |
mx4.spamfri.dk mx4.spamfri.dk |
AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 193.200.90.102 |
| 🔶 Autoconfig | 193.200.90.102 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3032::6815:29f8 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3032::ac43:a7d4 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.41.248,172.67.167.212 ech=AEX+DQBB/gAgACDfUtAAnHMbfKkGp0tpppMCsW1/56W7/RdmpC7oOoGVYQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:29f8,2606:4700:3032::ac43:a7d4 |
| TXT Record |
|---|
| v=spf1 include:_spf.e-studio.dk -all |
| Policy | Record (erlau.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.e-studio.dk -all |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve erlau.dk: 104.21.41.248 172.67.167.212 2606:4700:3032::6815:29f8 2606:4700:3032::ac43:a7d4 (AS13335) (all like this)www.erlau.dk: no address |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx4.spamfri.dk | DANE-EE · SPKI · SHA-256 | 4EE743A99328AEF5142706CA5FD3AD61… |
| 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 | 2415414562 |
| Primary NS (MNAME) | cesar.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 06:24:02 | 2226ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-22 12:53:56 shown | 1668ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-06 03:40:37 | 1208ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 04:39:39 | 1800ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-24 08:52:35 | 2540ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-22 05:16:24 | 5236ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-17 20:40:32 | 7141ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-01 16:56:30 | 3108ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-26 01:44:17 | 1432ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-20 00:47:09 | 981ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-19 23:06:55 | 770ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 08:10:25 | 740ms | 2 NS 2 A 1 MX | 🔓 Insecure |