arrowsikkerhetskurs.dk is a .dk domain served by 4 nameservers (pdns77.ultradns.biz, pdns77.ultradns.com, pdns77.ultradns.net and 1 more). It was registered on 30 October 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 52.234.0.82 is hosted by Microsoft Corporation (AS8075) in United States. Mail is handled by .. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 52.234.0.82 | 900s | — | AS8075 | Microsoft Corporation | 52.224.0.0/11 | 🇺🇸 United States | San Jose |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 43200s | . Null MX — domain accepts no email (RFC 7505) | |||
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (arrowsikkerhetskurs.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.arrowsikkerhetskurs.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:rywdzx3h@ag.dmarcian.com |
| www CNAME | mrktg.arwdns.com (all on arwdns.com) → 52.234.0.82 (AS8075) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 0/10 · policy: -all
No problems found| 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 | 2017093397 |
| Primary NS (MNAME) | pdns77.ultradns.com |
| Responsible (RNAME) | domadmin@arrow.com |
| Refresh | 43200s |
| Retry | 7200s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | MarkMonitor Inc. |
| Registered | 2017-10-30 |
| Expires | 2026-10-31 (14d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-10 07:11:31 | 538ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-02 15:48:54 | 751ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 15:28:27 | 566ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-25 10:27:52 | 648ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 10:25:02 | 2446ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-19 13:50:57 | 2909ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-13 13:45:01 | 844ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-06 00:39:24 | 595ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 11:29:17 | 581ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-26 11:07:27 | 750ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-25 20:22:40 | 688ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-22 15:40:06 | 1345ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-21 15:31:30 | 5437ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-20 15:26:59 | 24990ms | 4 NS 1 A 1 MX | ❓ Unknown |
| 2026-08-18 03:52:44 | 996ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-16 13:32:27 | 2943ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-15 11:25:43 | 1054ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-14 06:16:01 | 997ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-06 18:46:48 shown | 911ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-03 22:02:25 | 9702ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-29 20:27:56 | 1386ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-28 04:17:09 | 875ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-27 04:14:48 | 2661ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-26 03:52:06 | 3187ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-25 03:13:44 | 17202ms | 4 NS 1 A 1 MX | 🔓 Insecure |