holtab.dk is a .dk domain served by 3 nameservers (dns1.asp01.se, dns2.asp01.se, dns3.asp01.se). It was registered on 24 May 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 35.241.31.195 is hosted by Google LLC (AS396982) in United States. Mail is handled by holtab-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 |
|---|---|---|---|
| dns1.asp01.se | 185.186.56.152 | dns1.asp01.se | AS208001 Nordlo Vaxjo & Ljungby AB |
| dns2.asp01.se | 40.68.230.39 | — | AS8075 Microsoft Corporation |
| dns3.asp01.se | 185.186.56.153 | dns3.asp01.se | AS208001 Nordlo Vaxjo & Ljungby AB |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 35.241.31.195 | 3600s | 195.31.241.35.bc.googleusercontent.com | AS396982 | Google LLC | 35.240.0.0/13 | 🇺🇸 United States | Mountain View |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| MS=ms81436779 |
| v=spf1 a:mail.holtab.se a:mail1.holtab.se ip4:91.212.209.184 include:spf.protection.outlook.com a:mx01.asp01.se ~all |
| Policy | Record (holtab.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a:mail.holtab.se a:mail1.holtab.se ip4:91.212.209.184 include:spf.protection.outlook.com a:mx01.asp01.se ~all |
| Policy | Record (_dmarc.holtab.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc@holtab.se |
| www CNAME | holtab.dk (all on holtab.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-holtab-com._domainkey.holtab.onmicrosoft.com | RSA · ~2048 bit |
| selector2 | selector2-holtab-com._domainkey.holtab.onmicrosoft.com | 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: 4/10 · 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 | 2017100626 |
| Primary NS (MNAME) | dns1.asp01.se |
| Responsible (RNAME) | admin@asp01.se |
| Refresh | 900s |
| Retry | 600s |
| Expire | 86400s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Abion AB |
| Registered | 2005-05-24 |
| Expires | 2027-05-31 (220d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-01 05:35:28 shown | 3369ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-10 09:56:48 | 4487ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-27 06:36:30 | 3905ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 20:39:02 | 6472ms | 3 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 12:15:58 | 1454ms | 3 NS 1 A 1 MX | 🔓 Insecure |