smartguy.dk is a .dk domain served by 4 nameservers (ns1.krystal.io, ns2.krystal.io, ns3.krystal.io and 1 more). It was registered on 8 February 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 77.72.2.112 is hosted by Krystal Hosting Ltd (AS12488) in United Kingdom. Mail is handled by mx1.krystal.io, mx2.krystal.io. The zone is of unknown DNSSEC status, has no DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 77.72.2.112 | 30s | p112.lon.krystal.io | AS12488 | Krystal Hosting Ltd | 77.72.0.0/21 | 🇬🇧 United Kingdom | London |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 30s | mx1.krystal.io | 185.53.56.44 185.53.56.46 |
mx1.strikemail.co.uk mx1.strikemail.co.uk |
AS12488 Krystal Hosting Ltd AS12488 Krystal Hosting Ltd |
| 20 | 30s | mx2.krystal.io | 185.53.56.45 185.53.56.47 |
mx2.strikemail.co.uk mx2.strikemail.co.uk |
AS12488 Krystal Hosting Ltd AS12488 Krystal Hosting Ltd |
| TXT Record |
|---|
| v=spf1 ip4:185.194.90.17 ip4:77.72.2.112 include:relay.k.io a mx ip4:77.72.1.86 ~all |
| Policy | Record (smartguy.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:185.194.90.17 ip4:77.72.2.112 include:relay.k.io a mx ip4:77.72.1.86 ~all |
| www CNAME | smartguy.dk (all on smartguy.dk) → 77.72.2.112 (AS12488) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~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: 4/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.smartguy.dk | fFCP8JuVXXSBVOuRNt8b7t4hji8JeG4KUWddtTWB5Hk |
| Check | Result |
|---|---|
| Validation Status | ❓ Unknown |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | broken trust chain resolving 'smartguy.dk/A/IN': 172.28.0.2#53 |
| Field | Value |
|---|---|
| Serial | 2026101302 |
| Primary NS (MNAME) | ns1.krystal.io |
| Responsible (RNAME) | admin@demo.p112.lon.krystal.io |
| Refresh | 3600s |
| Retry | 1800s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | Nom-Iq Ltd |
| Registered | 2000-02-08 |
| Expires | 2027-03-31 (162d) |
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).
| Domain | Registrar |
|---|---|
| smartkido.dk | Nom-Iq Ltd |
| smartmen.dk | Nom-Iq Ltd |
| smartyoungster.dk | Nom-Iq Ltd |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-19 17:19:03 shown | 2253ms | 4 NS 1 A 2 MX | ❓ Unknown |
| 2026-10-18 16:16:48 | 2292ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-17 15:42:28 | 1481ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-16 15:41:21 | 1454ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-15 12:43:35 | 1730ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-14 10:56:29 | 1710ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-13 10:44:19 | 3644ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-12 05:42:14 | 2492ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-11 03:03:10 | 2087ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-10 00:46:59 | 2174ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-08 11:01:24 | 4143ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-07 10:50:47 | 2026ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-06 02:05:28 | 2243ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-05 02:02:03 | 3415ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-04 01:52:22 | 2575ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-03 01:50:00 | 1641ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-02 01:48:20 | 2929ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-10-01 01:34:56 | 2211ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-30 01:21:41 | 2467ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-29 01:03:29 | 1962ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-28 00:45:47 | 2016ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-27 00:38:44 | 1981ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-26 00:23:45 | 2235ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-25 00:04:04 | 3336ms | 4 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-23 23:41:15 | 2274ms | 4 NS 1 A 2 MX | 🔓 Insecure |