c-online.dk is a .dk domain served by 3 nameservers (ns1.dns.services, ns2.dns.services, ns3.dns.services). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 167.86.70.99 is hosted by Contabo GmbH (AS51167) in Germany. Mail is handled by mail.c-online.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 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 |
|---|---|---|---|---|---|---|---|
| 167.86.70.99 | 3499s | annemarie.c-online.dk | AS51167 | Contabo GmbH | 167.86.68.0/22 | 🇩🇪 Germany | Nuremberg |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 3600s | mail.c-online.dk | 2a02:c207:2006:9867::1 5.189.136.249 |
james.c-online.dk james.c-online.dk |
AS51167 Contabo GmbH AS51167 Contabo GmbH |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | c-online.dk → 167.86.70.99 |
| 🔶 Autoconfig | c-online.dk → 167.86.70.99 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a02:c207:2038:4605::1 | 3600s | annemarie.c-online.dk | AS51167 | Contabo GmbH | 2a02:c204:0:0:0:0:0:0/30 | 🇫🇷 France | Lauterbourg |
| TXT Record |
|---|
| v=spf1 a mx ip4:5.189.136.249 ip6:2a02:c207:2006:9867::1 ip6:2a02:c207:2006:9867:0000:0000:0000:0001 -all |
| Policy | Record (c-online.dk) |
|---|---|
| -all (hard fail) | v=spf1 a mx ip4:5.189.136.249 ip6:2a02:c207:2006:9867::1 ip6:2a02:c207:2006:9867:0000:0000:0000:0001 -all |
| Policy | Record (_dmarc.c-online.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@c-online.dk; |
| www CNAME | c-online.dk (all on c-online.dk) |
| www vs bare domain | Same network c-online.dk: 167.86.70.99 2a02:c207:2038:4605::1 (AS51167) www.c-online.dk: 167.86.70.99 2a02:c207:2038:4605::1 (AS51167) |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | RSA · ~1024 bit below 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: 2/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.c-online.dk | c-online.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2023051625 |
| Primary NS (MNAME) | ns1.dns.services |
| Responsible (RNAME) | post@dns.services |
| Refresh | 10800s |
| Retry | 3600s |
| Expire | 1814400s |
| Minimum (neg-cache TTL) | 7200s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-29 23:10:07 shown | 1573ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-29 15:13:08 | 2028ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 00:37:49 | 2977ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-15 04:09:17 | 588ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-24 18:15:28 | 3050ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-02 00:42:42 | 818ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:48:21 | 473ms | 3 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 18:40:18 | 657ms | 3 NS 1 A 1 MX | 🔒 Secure |