extremenerd.dk is a .dk domain served by 2 nameservers (langston.ns.cloudflare.com, surina.ns.cloudflare.com). It was registered on 1 February 2002 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 87.61.91.40 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by mail.protonmail.ch, mailsec.protonmail.ch. 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| langston.ns.cloudflare.com | — | — | — |
| surina.ns.cloudflare.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 87.61.91.40 | — | 0x573d5b28.static.cust.fastspeed.dk | AS3292 | TDC Holding A/S | 87.61.0.0/17 | 🇩🇰 Denmark | Odense |
| TXT Record |
|---|
| protonmail-verification=ed52f49a78e6d4acc4e4d0ede1d41a051bad1a73 |
| v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (extremenerd.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.protonmail.ch ~all |
| Policy | Record (_dmarc.extremenerd.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine |
| www | NXDOMAIN |
| www vs bare domain | www does not resolve (all like this) |
| Wildcard | No |
DNS lookups: 2/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mail.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 6111A5698D23C89E09C36FF833C1487E… |
| SMTP _25._tcp.mailsec.protonmail.ch | DANE-EE · SPKI · SHA-256 | 76BB66711DA416433CA890A5B2E5A053… |
| 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 | 2406576140 |
| Primary NS (MNAME) | langston.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2002-02-01 |
| Expires | 2027-03-31 (163d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 18:31:15 | 912ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-26 04:02:26 | 1237ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-28 23:51:22 | 1424ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-27 13:33:22 | 9848ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-26 16:40:31 | 2234ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-08-23 03:44:50 | 11018ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-27 07:58:03 | 1746ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-20 12:43:09 | 788ms | 2 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-17 09:10:04 shown | 2100ms | 2 NS 1 A 2 MX | 🔓 Insecure |