tandemcykling.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 23 February 2006 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 23.21.157.88 is hosted by Amazon.com, Inc. (AS14618) in United States. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 23.21.157.88 | 3600s | ec2-23-21-157-88.compute-1.amazonaws.com | AS14618 | Amazon.com, Inc. | 23.20.0.0/14 | 🇺🇸 United States | Ashburn |
| 23.21.234.173 | 3600s | ec2-23-21-234-173.compute-1.amazonaws.com | AS14618 | Amazon.com, Inc. | 23.20.0.0/14 | 🇺🇸 United States | Ashburn |
| www CNAME | tandemcykling.dk (all on tandemcykling.dk) |
| www vs bare domain | Same network tandemcykling.dk: 23.21.157.88 23.21.234.173 (AS14618) www.tandemcykling.dk: 23.21.157.88 23.21.234.173 (AS14618) |
| Wildcard | No |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100200 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2006-02-23 |
| Expires | 2027-02-28 (123d) |
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 |
|---|---|---|---|
| 2026-10-22 03:29:13 shown | 426ms | 3 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-02 07:09:56 | 590ms | 3 NS 2 A 0 MX | 🔒 Secure |
| 2026-10-01 07:04:56 | 572ms | 3 NS 2 A 0 MX | 🔒 Secure |
| 2026-09-30 07:43:17 | 338ms | 3 NS 2 A 0 MX | 🔒 Secure |
| 2026-08-28 06:32:30 | 584ms | 3 NS 2 A 0 MX | 🔒 Secure |
| 2026-06-17 14:25:39 | 1230ms | 3 NS 2 A 0 MX | 🔒 Secure |