gtsdk.dk is a .dk domain served by 2 nameservers (ns01.curadc.dk, ns02.curadc.dk). It was registered on 24 March 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 198.185.159.144 is hosted by Squarespace, Inc. (AS53831) in United States. Mail is handled by gtsdk-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns01.curadc.dk | 185.158.206.52 | ns01.curadc.dk | AS212991 CURAit A/S |
| ns02.curadc.dk | 185.158.206.53 | ns02.curadc.dk | AS212991 CURAit A/S |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 198.185.159.144 | 60s | — | AS53831 | Squarespace, Inc. | 198.185.159.0/24 | 🇺🇸 United States | New York |
| 198.185.159.145 | 60s | — | AS53831 | Squarespace, Inc. | 198.185.159.0/24 | 🇺🇸 United States | — |
| 23.227.38.65 | 60s | myshopify.com | AS13335 | Cloudflare, Inc. | 23.227.38.0/23 | 🇨🇦 Canada | Ottawa |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.56 |
| 🔶 Autoconfig | 23.227.38.65 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| _globalsign-domain-verification=-1CEcJa3qkm82CnPyEJ25FIxWorUZ75Zeh3311QWxL |
| _globalsign-domain-verification=aqKCZRcXRaeTD_1D7dskpjS17_xRntQ4DzVHrSHR8F |
| _globalsign-domain-verification=c2Cb8EQFoxuZcVKayagzfnYYXCJiyuCRBHRsGC_e__ |
| eeid86ojgqq3ngvp8mtm5b62t4 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (gtsdk.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.gtsdk.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; |
| www | 23.227.38.65 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network gtsdk.dk: 198.185.159.144 198.185.159.145 23.227.38.65 (AS13335 AS53831) www.gtsdk.dk: 23.227.38.65 (AS13335) |
| Wildcard | Yes: any name under the zone resolves |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-gtsdk-dk._domainkey.gtsdk.p-v1.dkim.mail.microsoft | 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: 1/10 · policy: -all
No problems found| 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 | 2026020401 |
| Primary NS (MNAME) | ns01.curadc.dk |
| Responsible (RNAME) | hostmaster@gtsdk.dk |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1998-03-24 |
| Expires | 2027-03-31 (164d) |
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 |
|---|---|
| gunnartstrøm.dk | Punktum dk A/S (direct) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-26 17:30:46 shown | 1371ms | 2 NS 3 A 1 MX | 🔓 Insecure |
| 2026-06-24 07:26:26 | 1341ms | 2 NS 3 A 1 MX | ❓ Unknown |
| 2026-06-23 18:53:00 | 994ms | 2 NS 3 A 1 MX | 🔓 Insecure |
| 2026-06-17 10:12:49 | 4568ms | 2 NS 3 A 1 MX | 🔓 Insecure |