certasenergy.dk is a .dk domain served by 3 nameservers (ns0.phase8.net, ns1.phase8.net, ns2.phase8.net). It was registered on 3 September 2013 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.144.162.21 is hosted by British Telecommunications PLC (AS2856) in United Kingdom. Mail is handled by cust28654-1.in.mailcontrol.com, cust28654-2.in.mailcontrol.com. The zone is not DNSSEC-signed, has no 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 |
|---|---|---|---|---|---|---|---|
| 81.144.162.21 | 86400s | — | AS2856 | British Telecommunications PLC | 81.128.0.0/11 | 🇬🇧 United Kingdom | Enfield |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 86400s | cust28654-1.in.mailcontrol.com | 85.115.52.190 | cluster-a.mailcontrol.com | AS44444 Forcepoint UK Limited |
| 10 | 86400s | cust28654-2.in.mailcontrol.com | 85.115.54.190 | cluster-j.mailcontrol.com | AS44444 Forcepoint UK Limited |
| www | 81.144.162.21 (AS2856) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| 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 | 2019060502 |
| Primary NS (MNAME) | ns0.phase8.net |
| Responsible (RNAME) | support@phase8.net |
| Refresh | 28800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | ASCIO TECHNOLOGIES, CORP. DANMARK - FILIAL AF ASCIO TECHNOLOGIES, CORP. CANADA |
| Registered | 2013-09-03 |
| Expires | 2027-09-30 (348d) |
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 |
|---|---|---|---|
| 2026-09-29 16:31:25 | 3001ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-09-09 09:16:50 | 6794ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-24 03:44:58 | 2944ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-21 22:29:55 | 1157ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 11:03:38 shown | 957ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-19 07:01:37 | 1811ms | 3 NS 1 A 2 MX | 🔓 Insecure |
| 2026-06-16 20:10:11 | 773ms | 3 NS 1 A 2 MX | 🔓 Insecure |