jumpbox.dk is a .dk domain served by 2 nameservers (iris.ns.cloudflare.com, phil.ns.cloudflare.com). It was registered on 4 November 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.6.42 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.forwardemail.net, mx2.forwardemail.net. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.6.42 | 600s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.154.230 | 600s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.forwardemail.net → 121.127.44.69 |
| 🔶 Autoconfig | autoconfig.forwardemail.net → 121.127.44.69 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3034::6815:62a | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:9ae6 | 600s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h2" ipv4hint=104.21.6.42,172.67.154.230 ech=AEX+DQBBmQAgACAW2Zml2I0DYSJ6ZUQjSHgtTQ4aJ7FXZdhBDW7ShydAEAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:62a,2606:4700:3037::ac43:9ae6 |
| TXT Record |
|---|
| forward-email-site-verification=w6VgluP2Sh |
| google-site-verification=LXRM5DadXpqALUicFGMGTfzIUzlx5f8nXVI495M12Ec |
| v=spf1 a include:spf.forwardemail.net include:spf.protection.outlook.com ~all |
| Policy | Record (jumpbox.dk) |
|---|---|
| ~all (soft fail) | v=spf1 a include:spf.forwardemail.net include:spf.protection.outlook.com ~all |
| Policy | Record (_dmarc.jumpbox.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc-6606637b16b8ee64589dbb03@forwardemail.net; |
| www | 104.21.6.42 172.67.154.230 2606:4700:3032::ac43:9ae6 2606:4700:3037::6815:62a (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 7/10 · policy: ~all
No problems found| Service / Owner | Type | Cert association |
|---|---|---|
| SMTP _25._tcp.mx1.forwardemail.net | DANE-EE · SPKI · SHA-256 | 5E81DA1AF16DF20B13E667AD6D9C2B65… |
| SMTP _25._tcp.mx2.forwardemail.net | DANE-EE · SPKI · SHA-256 | 5E81DA1AF16DF20B13E667AD6D9C2B65… |
| 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 | 2403601606 |
| Primary NS (MNAME) | iris.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2018-11-04 |
| Expires | 2026-11-30 (42d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 19:33:59 | 1704ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-10 14:26:30 | 1861ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-09 12:40:19 | 2474ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-07 18:09:56 | 644ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-10-03 09:23:42 | 912ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-30 09:04:50 | 739ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-25 17:43:06 | 1261ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-21 03:36:30 | 1397ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-14 02:45:20 | 2134ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-09 05:26:44 | 3059ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-09-05 08:43:12 | 1299ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-27 05:38:05 | 1163ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-15 02:39:04 | 1391ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-11 09:46:45 | 1472ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-08-06 22:23:00 | 1594ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-16 11:33:51 | 9611ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-07-06 10:58:13 | 7002ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-20 00:33:00 shown | 656ms | 2 NS 2 A 2 MX | 🔓 Insecure |
| 2026-06-17 11:57:18 | 1350ms | 2 NS 2 A 2 MX | 🔓 Insecure |