esug.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 4 October 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.42.34 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx.spamfilter.io, mxa.eu.mailgun.org and 1 more. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this 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 |
|---|---|---|---|---|---|---|---|
| 185.21.42.34 | 3600s | linux35.curanet.dk | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscoverredirect.webexchange.nu → 212.237.249.80 |
| 🔶 Autoconfig | 185.21.42.34 |
| TXT Record |
|---|
| v=spf1 include:mailgun.org ip4:185.25.141.12 ip4:91.197.248.75 ip4:94.231.105.120 include:spf.curanet.dk ~all |
| Policy | Record (esug.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:mailgun.org ip4:185.25.141.12 ip4:91.197.248.75 ip4:94.231.105.120 include:spf.curanet.dk ~all |
| Policy | Record (_dmarc.esug.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| www | 104.21.50.209 172.67.167.29 2606:4700:3034::6815:32d1 2606:4700:3035::ac43:a71d (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u29276135.wl136.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u29276135.wl136.sendgrid.net | 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: 8/10 · policy: ~all
| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx.spamfilter.io | DANE-EE · SPKI · SHA-256 | 9A25F05F2E322DABDCC9B7A06AB47A2D… |
| 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 | 2026061604 |
| Primary NS (MNAME) | ns.dandomain.dk |
| Responsible (RNAME) | hostmaster@dandomain.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | DANDOMAIN A/S |
| Registered | 2010-10-04 |
| Expires | 2026-10-31 (13d) |
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 |
|---|---|---|---|
| 2026-10-01 08:42:56 | 959ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-30 08:36:47 | 729ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-24 01:03:57 | 820ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-09-05 03:18:01 | 1242ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-07-03 20:35:18 | 9865ms | 2 NS 2 A 3 MX | 🔓 Insecure |
| 2026-06-29 13:38:53 | 697ms | 2 NS 1 A 3 MX | 🔒 Secure |
| 2026-06-22 03:15:50 | 582ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-20 15:12:40 | 709ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-19 00:24:49 shown | 2126ms | 2 NS 1 A 3 MX | 🔓 Insecure |
| 2026-06-17 08:27:02 | 1453ms | 2 NS 1 A 3 MX | 🔒 Secure |