rum21.dk is a .dk domain served by 2 nameservers (jean.ns.cloudflare.com, jermaine.ns.cloudflare.com). It was registered on 2 December 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.18.30.120 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by rum21-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.18.30.120 | 300s | — | AS13335 | Cloudflare, Inc. | 104.16.0.0/14 | — | — |
| 104.18.31.120 | 300s | — | AS13335 | Cloudflare, Inc. | 104.16.0.0/14 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.152 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700::6812:1e78 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:0:0:0:0:0:0/43 | 🇺🇸 United States | — |
| 2606:4700::6812:1f78 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:0:0:0:0:0:0/43 | 🇺🇸 United States | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h2" ipv4hint=104.18.30.120,104.18.31.120 ipv6hint=2606:4700::6812:1e78,2606:4700::6812:1f78 |
| TXT Record |
|---|
| google-site-verification=F--T7wM23Q4f9JFmU6T_5AIxcXnlKZoZl7x6OwYNrnc |
| google-site-verification=GmrW7SW-6jzcJcdWrHUqnk0btksp39Kp0pkpUrB26hg |
| MS=ms53177886 |
| v=spf1 include:spf.protection.outlook.com include:spf.mandrillapp.com include:amazonses.com include:spf.dixa.io a:mail.logtrade.info -all |
| Policy | Record (rum21.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:spf.mandrillapp.com include:amazonses.com include:spf.dixa.io a:mail.logtrade.info -all |
| Policy | Record (_dmarc.rum21.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:dmarcreports@rum21.dk |
| www | 104.18.30.120 104.18.31.120 2606:4700::6812:1e78 2606:4700::6812:1f78 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u9880187.wl188.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u9880187.wl188.sendgrid.net | RSA · ~1024 bit below 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: 6/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.rum21.dk | F-V0NG3F68a5UxsVs1-ZGvUQ8iiUDnwc-TeQKAw6On8 |
| TXT | _acme-challenge.rum21.dk | kVDD5IiC1Go_EC5-Cp-b4E5e2XgLwki59fQSrFtbaos |
| TXT | _acme-challenge.rum21.dk | kjIdLpwKq-FKcFlo0iuXIH2TzG_Qn8qryDz_G2vGdhM |
| 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 | 2418027637 |
| Primary NS (MNAME) | jean.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Abion AB |
| Registered | 2010-12-02 |
| Expires | 2026-12-31 (69d) |
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 |
|---|---|---|---|
| 2026-10-22 02:33:29 shown | 668ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-05 12:42:53 | 2107ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 12:12:15 | 762ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-27 04:55:51 | 797ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 04:52:07 | 1104ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-25 19:08:40 | 1526ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-24 18:32:19 | 886ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-23 17:59:22 | 4788ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-20 14:17:14 | 12221ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-07 14:03:00 | 2125ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-03 06:42:58 | 1450ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-23 06:24:53 | 3775ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-22 12:31:23 | 946ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 16:07:31 | 3217ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-18 08:14:22 | 4028ms | 2 NS 2 A 1 MX | 🔓 Insecure |