dulong.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 9 January 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 23.227.38.32 is hosted by Cloudflare, Inc. (AS13335) in Canada. Mail is handled by mx.simply.com. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 23.227.38.32 | 600s | myshopify.com | AS13335 | Cloudflare, Inc. | 23.227.38.0/23 | 🇨🇦 Canada | Ottawa |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx.simply.com | 94.231.106.20 | mx.simply.com | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| TXT Record |
|---|
| google-site-verification=n1QQfwP9Lpa8T8AmXezP_ftOFS4vTqmPWw5DRo1FBVs |
| v=spf1 include:spf.simply.com ?all |
| Policy | Record (dulong.dk) |
|---|---|
| ?all (neutral) | v=spf1 include:spf.simply.com ?all |
| www CNAME | shops.myshopify.com (all on myshopify.com) |
| www vs bare domain | Same network |
| Wildcard | No |
| 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: 1/10 · policy: ?all
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 4B949F05A63FED95FC94B3A83DD70167… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | A9D603AF4D7ED6B9246B4B68500CD6F2… |
| SMTP _25._tcp.mx.simply.com | DANE-EE · SPKI · SHA-256 | 97A3BA009F39C761BFFB6574340E8138… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100100 |
| 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 | 2002-01-09 |
| Expires | 2027-03-31 (160d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 11:12:15 shown | 1691ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 10:33:33 | 555ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 01:45:16 | 712ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-23 12:42:16 | 726ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 18:06:06 | 511ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 05:24:39 | 20653ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 05:08:05 | 406ms | 4 NS 1 A 1 MX | ⚠️ Bogus |
| 2026-06-17 05:00:33 | 1022ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 05:00:31 | 1525ms | 4 NS 1 A 1 MX | ⚠️ Bogus |