rtrosenberg.dk is a .dk domain served by 3 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk). It was registered on 31 July 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.198.79.1 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by ASPMX.L.GOOGLE.COM, ALT1.ASPMX.L.GOOGLE.COM and 6 more. The zone is DNSSEC-signed and validates, publishes a 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 |
|---|---|---|---|---|---|---|---|
| 216.198.79.1 | 14400s | — | AS16509 | Amazon.com, Inc. | 216.198.79.0/24 | 🇺🇸 United States | — |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 0 | 0 | 443 | cpanelemaildiscovery.cpanel.net |
| TXT Record |
|---|
| google-site-verification=0oi9KpQlM8_2XcSDJGTSjV_f4ojEz6Kb-tyOlskOioY |
| google-site-verification=eDA3qju9eOYpvX5-kOoc-SxKJn3wI8T7_s56WJUMJhM |
| google-site-verification=XFb80sO-eM0TjWQqtD7g9D1cWrZdNru3BOOuRh_f0VY |
| v=spf1 +a +mx +ip4:193.200.90.178 include:_spf.e-studio.dk ~all |
| Policy | Record (rtrosenberg.dk) |
|---|---|
| ~all (soft fail) | v=spf1 +a +mx +ip4:193.200.90.178 include:_spf.e-studio.dk ~all |
| Policy | Record (_dmarc.rtrosenberg.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 216.150.16.193 216.150.16.65 (AS16509) (address records, no CNAME) |
| www vs bare domain | Same network rtrosenberg.dk: 216.150.16.193 216.150.16.65 (AS16509) www.rtrosenberg.dk: 216.150.16.193 216.150.16.65 (AS16509) |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| — | RSA · ~2048 bit |
DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.
DNS lookups: 3/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.rtrosenberg.dk | sQsoxsNOsadn_21nX7Ix8KMWsAh5OzcIdh5dgC071Pk |
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.spamfri.dk | DANE-EE · SPKI · SHA-256 | 884451547A03D0AC2F628D943839BAA6… |
| SMTP _25._tcp.mx2.spamfri.dk | DANE-EE · SPKI · SHA-256 | 6598C93F79B95376BB8099E9AC862167… |
| SMTP _25._tcp.mx3.spamfri.dk | DANE-EE · SPKI · SHA-256 | BBFB0694919290E5BC9D6E2C6F47D846… |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026090703 |
| Primary NS (MNAME) | ns1.e-studio.dk |
| Responsible (RNAME) | hostmaster@mailrelay.e-studio.dk |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2017-07-31 |
| Expires | 2028-07-31 (646d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 05:00:26 | 798ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-09-28 17:36:32 | 1025ms | 2 NS 2 A 5 MX | 🔓 Insecure |
| 2026-09-16 08:07:53 | 929ms | 3 NS 1 A 8 MX | 🔒 Secure |
| 2026-09-12 01:15:01 | 937ms | 3 NS 1 A 8 MX | 🔒 Secure |
| 2026-09-09 22:43:56 shown | 1114ms | 3 NS 1 A 8 MX | 🔒 Secure |
| 2026-09-04 02:04:11 | 802ms | 3 NS 1 A 8 MX | 🔒 Secure |
| 2026-07-08 17:39:50 | 2229ms | 3 NS 1 A 8 MX | 🔒 Secure |
| 2026-07-02 11:02:55 | 1859ms | 3 NS 1 A 8 MX | 🔒 Secure |
| 2026-06-21 05:14:38 | 3602ms | 3 NS 1 A 8 MX | ⚠️ Bogus |
| 2026-06-17 18:34:10 | 6401ms | 3 NS 1 A 8 MX | 🔒 Secure |