e-teori.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 21 December 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.24.57.1 is hosted by Render (AS397273) in United States. Mail is handled by mx.simply.com. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest 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 |
|---|---|---|---|---|---|---|---|
| 216.24.57.1 | 3600s | ip-216-24-57-1.ingress.render.com | AS397273 | Render | 216.24.57.0/24 | 🇺🇸 United States | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.simply.com | 94.231.103.108 94.231.106.20 |
mx.simply.com mx.simply.com |
AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 91.98.83.30 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| facebook-domain-verification=yt1ma2gwi4k651o1rf1a3a8jl7z8i2 |
| google-site-verification=iX2sXAcc9l4g5wltl7vNYmLzT0njPBIa5VrW8zPyNgk |
| v=spf1 include:amazonses.com include:spf.simply.com ~all |
| Policy | Record (e-teori.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:amazonses.com include:spf.simply.com ~all |
| Policy | Record (_dmarc.e-teori.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@robot.simply.com; ruf=mailto:dmarc@robot.simply.com; |
| www CNAME | eteori-web.onrender.com (all on onrender.com) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.e-teori.dk | verify-h3ve2paz.ssl.on-forge.com |
| 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 | 4B949F05A63FED95FC94B3A83DD70167… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100400 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2021-12-21 |
| Expires | 2026-12-20 (58d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 11:16:24 shown | 532ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-04 15:48:51 | 1864ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 15:30:52 | 652ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 14:41:20 | 612ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-04 08:28:45 | 551ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-08 05:53:49 | 2476ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-18 09:48:17 | 4855ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-14 13:01:07 | 9669ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 23:13:14 | 709ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 23:23:23 | 1361ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 18:03:25 | 1168ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 06:14:14 | 1696ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 05:51:56 | 1785ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 05:30:15 | 546ms | 4 NS 1 A 1 MX | 🔒 Secure |