guehring.dk is a .dk domain served by 5 nameservers (ns.gbc.gmbh, ns.gbc.green, ns.gbc.jetzt and 2 more). It was registered on 18 March 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 212.97.109.233 is hosted by GBC GmbH Internet Service Center Ingenieurgesellschaft fuer Systemsoftware und Kommunikation (AS24766) in Germany. Mail is handled by guehring-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 212.97.109.233 | 3600s | guehring02.gbc.systems | AS24766 | GBC GmbH Internet Service Center Ingenieurgesellschaft fuer Systemsoftware und Kommunikation | 212.97.96.0/19 | 🇩🇪 Germany | Ehningen |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.149.136 |
| 🔶 Autoconfig | guehring.dk → 212.97.109.233 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 0 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| knowbe4-site-verification=9d0f4df6f13825cf34e369b1b9ed1921 |
| v=spf1 ip4:212.97.109.201 ip4:212.97.96.157 ip4:194.6.208.114 ip4:194.6.209.235 ip4:194.6.209.236 ip6:2a00:f48:1008::208:114:10 ip6:2a00:f48:1008::209:235:10 ip6:2a00:f48:1008::209:236:10 include:spf.protection.outlook.com -all |
| Policy | Record (guehring.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:212.97.109.201 ip4:212.97.96.157 ip4:194.6.208.114 ip4:194.6.209.235 ip4:194.6.209.236 ip6:2a00:f48:1008::208:114:10 ip6:2a00:f48:1008::209:235:10 ip6:2a00:f48:1008::209:236:10 include:spf.protection.outlook.com -all |
| www CNAME | guehring.dk (all on guehring.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.guehring.dk | guehring.dk |
| TXT | guehring.dk | knowbe4-site-verification=9d0f4df6f13825cf34e369b1b9ed1921 |
| 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 | 2025120404 |
| Primary NS (MNAME) | ns.gbc.systems |
| Responsible (RNAME) | support@gbc.net |
| Refresh | 3600s |
| Retry | 900s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | LEMARIT GmbH |
| Registered | 2004-03-18 |
| Expires | 2027-03-31 (165d) |
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 |
|---|---|---|---|
| 2026-10-09 09:57:22 shown | 3063ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 05:59:40 | 2458ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-28 11:13:51 | 2462ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-26 16:35:54 | 8248ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 08:57:51 | 1477ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 10:38:58 | 1917ms | 5 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 10:38:22 | 1575ms | 5 NS 1 A 1 MX | 🔓 Insecure |