feltopgave.dk is a .dk domain served by 2 nameservers (ivan.ns.cloudflare.com, ruth.ns.cloudflare.com). It was registered on 1 October 2026 (WHOIS) and first appeared in the .dk zone on 2 October 2026. Its website address 104.21.29.224 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by .. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.29.224 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.149.218 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | . Null MX — domain accepts no email (RFC 7505) | |||
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3031::ac43:95da | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:1de0 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.29.224,172.67.149.218 ech=AEX+DQBBhgAgACDjScWB3kqXZoqbxm1VkTnuOT+2ETMrAhz1Bhph5U93AwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:95da,2606:4700:3035::6815:1de0 |
| TXT Record |
|---|
| v=DKIM1; p= |
| v=spf1 -all |
| Policy | Record (feltopgave.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.feltopgave.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | ; |
| 0 | issue | comodoca.com |
| 0 | issue | digicert.com; cansignhttpexchanges=yes |
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog; cansignhttpexchanges=yes |
| 0 | issue | ssl.com |
| 0 | issuewild | ; |
| 0 | issuewild | comodoca.com |
| 0 | issuewild | digicert.com; cansignhttpexchanges=yes |
| 0 | issuewild | letsencrypt.org |
| 0 | issuewild | pki.goog; cansignhttpexchanges=yes |
| 0 | issuewild | ssl.com |
| www | 104.21.29.224 172.67.149.218 2606:4700:3031::ac43:95da 2606:4700:3035::6815:1de0 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network feltopgave.dk: 104.21.29.224 172.67.149.218 2606:4700:3031::ac43:95da 2606:4700:3035::6815:1de0 (AS13335) www.feltopgave.dk: 104.21.29.224 172.67.149.218 2606:4700:3031::ac43:95da 2606:4700:3035::6815:1de0 (AS13335) |
| 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 | 2417318590 |
| Primary NS (MNAME) | ivan.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2026-10-01 |
| Expires | 2027-09-30 (348d) |
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 |
|---|---|---|---|
| 2026-10-14 02:11:54 shown | 461ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-07 13:08:40 | 783ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-05 09:02:32 | 758ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-04 08:34:53 | 996ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 08:31:56 | 1081ms | 2 NS 1 A 1 MX | 🔓 Insecure |