matthew.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 28 May 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 176.21.113.227 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by matthew.dk. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 176.21.113.227 | 3600s | 176-21-113-227-cable.dk.customer.tdc.net | AS3292 | TDC Holding A/S | 176.21.0.0/16 | 🇩🇰 Denmark | Copenhagen |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | matthew.dk | 176.21.113.227 | 176-21-113-227-cable.dk.customer.tdc.net | AS3292 TDC Holding A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 176.21.113.227 |
| 🔶 Autoconfig | 176.21.113.227 |
| TXT Record |
|---|
| v=spf1 a mx ip4:176.21.113.227 -all |
| Policy | Record (matthew.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx ip4:176.21.113.227 -all |
| Policy | Record (_dmarc.matthew.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; pct=100; rua=mailto:postmaster@klestrup.com |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | letsencrypt.org |
| www | 176.21.113.227 (AS3292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~2048 bit |
| — | RSA · ~1024 bit below 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: 2/10 · policy: -all
No problems found| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026092001 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2001-05-28 |
| Expires | 2027-06-30 (253d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-03 01:22:41 | 4400ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 12:10:53 | 711ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 23:17:59 | 2376ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 13:37:21 | 581ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-21 13:11:55 shown | 606ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-10 01:02:29 | 796ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 22:15:29 | 538ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-25 22:53:35 | 856ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-25 19:16:24 | 1574ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 05:14:45 | 472ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 14:43:18 | 1274ms | 2 NS 1 A 1 MX | 🔒 Secure |