co3.dk is a .dk domain served by 6 nameservers (ns10.digicertdns.com, ns11.digicertdns.com, ns12.digicertdns.com and 3 more). It was registered on 2 December 1999 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 199.60.103.155 is hosted by Cloudflare London, LLC (AS209242) in United States. Mail is handled by co3-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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 199.60.103.155 | 3600s | — | AS209242 | Cloudflare London, LLC | 199.60.103.0/24 | 🇺🇸 United States | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 52.98.154.136 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| _globalsign-domain-verification=yTJ6XxRRO38i6qTJB812_bo6TExUf9HX7-a1I345uf |
| atlassian-domain-verification=JZVFvOHASSzV7Ia6LeXxP2pNDv3LChBMPrZR07WD3JMityq4a5rWFKrI2CI7ajfl |
| google-site-verification=1-uNiTsTCzJUBGBwM_MtB5q-nDFN-1KVfBJa5BOWWKM |
| google-site-verification=llnONK-z-W0mjjiANO0qD5CJgRJaiWXrOWF8wVOV98c |
| google-site-verification=ZABA64OcH70Dlyf2kcpyaP3G67xrUwbgdO1lb5sjbAQ |
| hubspot-developer-verification=MjMyZTVhYjEtNTdlYi00MTY3LWJmYzEtMGZmOGM4M2VkMTkx |
| MS=ms91430389 |
| v=spf1 include:_spf.google.com include:_spf.wehost.dk include:mail.zendesk.com include:spf.protection.outlook.com include:acemdns.com include:app.sgizmo.com include:26250954.spf06.hubspotemail.net ip4:72.35.23.0/24 ip4:72.35.12.0/24 ip4:192.162.216.0/22 ip4:208.70.128.0/21 ip4:185.38.180.0/22 ip4:89.104.206.0/23 ip4:68.71.200.64/27 ip6:2a01:77c0:1180::/46 ip6:2a01:77c0:6::/47 ip6:2001:978:2a01::/48 ip6:2001:978:2a02::/48 ip4:79.136.102.64/26 ip4:94.136.64.224/27 ip4:83.140.31.128/26 ip4:213.136.34.128/26 ip4:91.236.209.128/26 ip4:185.37.140.0/26 ip6:2001:16d8:c001:2073::/64 ip6:2001:9b0:1:704::/64 ip4:185.51.78.140/30 ip4:185.99.120.0/22 ip4:185.150.198.82/31 ip4:185.163.188.0/22 ip4:194.9.86.0/23 ip6:2001:67c:27e0:2212::/64 ip6:2a04:7180:0:2400::/64 -all |
| WB=qWRDFldFJk2MLiXn0OCMlA |
| Policy | Record (co3.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:_spf.google.com include:_spf.wehost.dk include:mail.zendesk.com include:spf.protection.outlook.com include:acemdns.com include:app.sgizmo.com include:26250954.spf06.hubspotemail.net ip4:72.35.23.0/24 ip4:72.35.12.0/24 ip4:192.162.216.0/22 ip4:208.70.128.0/21 ip4:185.38.180.0/22 ip4:89.104.206.0/23 ip4:68.71.200.64/27 ip6:2a01:77c0:1180::/46 ip6:2a01:77c0:6::/47 ip6:2001:978:2a01::/48 ip6:2001:978:2a02::/48 ip4:79.136.102.64/26 ip4:94.136.64.224/27 ip4:83.140.31.128/26 ip4:213.136.34.128/26 ip4:91.236.209.128/26 ip4:185.37.140.0/26 ip6:2001:16d8:c001:2073::/64 ip6:2001:9b0:1:704::/64 ip4:185.51.78.140/30 ip4:185.99.120.0/22 ip4:185.150.198.82/31 ip4:185.163.188.0/22 ip4:194.9.86.0/23 ip6:2001:67c:27e0:2212::/64 ip6:2a04:7180:0:2400::/64 -all |
| Policy | Record (_dmarc.co3.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; adkim=r; aspf=r |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:admins@co3.dk |
| 0 | issue | digicert.com |
| 0 | issue | globalsign.com |
| 0 | issue | letsencrypt.org |
| www CNAME | 26250954.sites.hscoscdn-eu1.net (all on hscoscdn-eu1.net) |
| www vs bare domain | Different networks co3.dk: 199.60.103.155 (AS209242) (all like this)www.co3.dk: 141.101.90.96 141.101.90.97 141.101.90.98 141.101.90.99 (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| k1 | dkim.mcsv.net | RSA · ~1024 bit below 2048 bit |
| selector2 | selector2-co3-dk._domainkey.co3as.onmicrosoft.com | 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: 7/10 · policy: -all
| 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 | 2009010162 |
| Primary NS (MNAME) | ns10.digicertdns.com |
| Responsible (RNAME) | dns@digicertdns.com |
| Refresh | 43200s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 180s |
| Field | Value |
|---|---|
| Registrar | InterNetX GmbH |
| Registered | 1999-12-02 |
| Expires | 2026-12-31 (74d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-16 07:56:44 shown | 3926ms | 6 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 14:44:45 | 1297ms | 6 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-14 15:18:02 | 11997ms | 6 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-25 13:32:16 | 10026ms | 6 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 08:35:51 | 1088ms | 6 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-16 21:35:46 | 852ms | 6 NS 1 A 1 MX | 🔓 Insecure |