citycontainerrtr.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 28 February 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by frontmta.hostedsepo.dk. The zone is not DNSSEC-signed, has no DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 81.19.253.158 | 3600s | — | — | — | — | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 600s | frontmta.hostedsepo.dk | 92.43.124.44 | — | AS44398 Itm8 A/S |
| TXT Record |
|---|
| v=spf1 ptr:itafdelingen.net include:o._spf.hostedsepo.dk include:spf.protection.outlook.com -all |
| Policy | Record (citycontainerrtr.dk) |
|---|---|
| -all (hard fail) | v=spf1 ptr:itafdelingen.net include:o._spf.hostedsepo.dk include:spf.protection.outlook.com -all |
| www | 81.19.253.158 (address records, no CNAME) |
| 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: 3/10 · policy: -all
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.frontmta.hostedsepo.dk | DANE-TA · SPKI · SHA-256 | 1E20888F63520C235F8E61FDEA725CCE… |
| SMTP _25._tcp.frontmta.hostedsepo.dk | DANE-EE · SPKI · SHA-256 | F6EC319A6D18F16926CF1DC9D5AFACBE… |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✓ Found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2026062402 |
| 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 | 2011-02-28 |
| Expires | 2027-02-28 (128d) |
Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).
| Domain | Registrar |
|---|---|
| citystudent.dk | Simply.com A/S |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 16:30:13 | 2558ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-04 00:47:55 | 606ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-23 21:46:13 | 2441ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-10 05:25:20 | 485ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-26 22:40:00 | 547ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-11 06:00:43 | 16853ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-28 20:40:11 | 1026ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-27 01:16:06 shown | 1167ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 20:55:04 | 621ms | 2 NS 1 A 1 MX | 🔒 Secure |