gtholding.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 139.162.156.251 is hosted by Akamai Connected Cloud (AS63949) in Germany. Mail is handled by mail.it-solutions.dk. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 139.162.156.251 | 3600s | home.it-solutions.dk | AS63949 | Akamai Connected Cloud | 139.162.0.0/16 | 🇩🇪 Germany | Frankfurt am Main |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 5 | 3600s | mail.it-solutions.dk | 139.144.70.51 2a01:7e01::f03c:93ff:fe9c:6837 |
mail.it-solutions.dk mail.it-solutions.dk |
AS63949 Akamai Connected Cloud AS63949 Akamai Connected Cloud |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | mail.it-solutions.dk → 139.144.70.51 |
| 🔶 Autoconfig | mail.it-solutions.dk → 139.144.70.51 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a01:7e01::f03c:94ff:fe45:fb45 | 3600s | home.it-solutions.dk | AS63949 | Akamai Connected Cloud | 2a01:7e00:0:0:0:0:0:0/30 | 🇩🇪 Germany | Frankfurt am Main |
| TXT Record |
|---|
| v=DKIM1;k=rsa;t=s;s=email;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArcJSWI2obdDo4Xg080S/4xUr3OImXp2arOSmfm5LzJPsP+XMWo8+GtR5kmZ43Po343ht+mpEr1ATfv+nXoq5Fi8ZCmJzpr1Svv3BYcaM4gL7bldUeTEkh51buUQ0c/EjUWhwfiRqSzbfgj9FaCqFQu0gsNj8w9YuBNsXqOP/tc/WX+VS5/3nZdlgJU9QOwTFDOKaZARqn1wLnYj+Avkv/pQfUAUuLArITEWI1jOiVv0LBb/WGHc9RmfPbNGKxFLjKUsvcm7MOMlmsu+Hiv+sa+dgcRHcN2l26Yuw8AvJvGgoT6tJOB/LUmP+M9VMyl/QbWkrpT2er0E77GppRy9QywIDAQAB |
| v=spf1 mx a a:home.it-solutions.dk ip6:2a01:7e01::f03c:93ff:fe47:f6f1 ip4:172.105.85.39 ip4:212.237.179.26 ip4:139.144.70.51 ip4:217.61.236.115 ip4:185.134.30.91 include:spf.mandrillapp.com ~all |
| Policy | Record (gtholding.dk) |
|---|---|
| ~all (soft fail) | v=spf1 mx a a:home.it-solutions.dk ip6:2a01:7e01::f03c:93ff:fe47:f6f1 ip4:172.105.85.39 ip4:212.237.179.26 ip4:139.144.70.51 ip4:217.61.236.115 ip4:185.134.30.91 include:spf.mandrillapp.com ~all |
| Policy | Record (_dmarc.gtholding.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; |
| www | 172.104.225.149 2a01:7e01::2000:34ff:feaa:1582 (AS63949) (address records, no CNAME) |
| www vs bare domain | Same network gtholding.dk: 172.104.225.149 2a01:7e01::2000:34ff:feaa:1582 (AS63949) www.gtholding.dk: 172.104.225.149 2a01:7e01::2000:34ff:feaa:1582 (AS63949) |
| Wildcard | Yes: any name under the zone resolves |
| 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 |
DNS lookups: 4/10 · 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 | 2024121201 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-02 16:33:25 | 1416ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 15:54:56 | 568ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-01 10:26:58 | 828ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-22 15:32:25 shown | 654ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 10:00:24 | 8967ms | 4 NS 1 A 1 MX | 🔒 Secure |