sersor.dk is a .dk domain served by 2 nameservers (robert.ns.cloudflare.com, serenity.ns.cloudflare.com). It was registered on 12 October 2026 (WHOIS) and first appeared in the .dk zone on 14 October 2026. Its website address 104.21.38.158 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.38.158 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.168.41 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::ac43:a829 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::6815:269e | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.38.158,172.67.168.41 ech=AEX+DQBBvAAgACDCEGpSvI5yiNtcYtYwc/UiEXDsWjUYGeDBTaKhdh77dAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:a829,2606:4700:3037::6815:269e |
| TXT Record |
|---|
| v=spf1 -all |
| Policy | Record (sersor.dk) |
|---|---|
| -all (hard fail) | v=spf1 -all |
| Policy | Record (_dmarc.sersor.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; rua=mailto:7b7ad97b02644dd78ce88809a338e3ed@dmarc-reports.cloudflare.net; |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:info@sersor.com |
| 0 | issue | comodoca.com |
| 0 | issue | digicert.com; cansignhttpexchanges=yes |
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog; cansignhttpexchanges=yes |
| 0 | issue | sectigo.com |
| 0 | issue | ssl.com |
| 0 | issuewild | comodoca.com |
| 0 | issuewild | digicert.com; cansignhttpexchanges=yes |
| 0 | issuewild | letsencrypt.org |
| 0 | issuewild | pki.goog; cansignhttpexchanges=yes |
| 0 | issuewild | sectigo.com |
| 0 | issuewild | ssl.com |
| www | 104.21.38.158 172.67.168.41 2606:4700:3030::ac43:a829 2606:4700:3037::6815:269e (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 0/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.sersor.dk | jsxDb4FA5Fvoh-J7KPK7vaOUvYff95gQR9aO0ET3VVQ |
| TXT | _acme-challenge.sersor.dk | v2TrUR8ZxEkKoyYgwp_mCnwjbQUTrcWgDoWFkgXYQHs |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2417537050 |
| Primary NS (MNAME) | robert.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | NETIM |
| Registered | 2026-10-12 |
| Expires | 2027-10-11 (356d) |
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 |
|---|---|---|---|
| 2026-10-19 18:02:06 | 4439ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-18 15:51:17 | 570ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-17 15:20:11 | 2219ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-17 15:01:21 | 617ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-16 13:35:14 | 838ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-15 10:15:11 shown | 2242ms | 2 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-14 08:35:21 | 604ms | 1 NS 0 A 0 MX | ❓ Unknown |