dfbf.dk is a .dk domain served by 2 nameservers (dilbert.ns.cloudflare.com, lindsey.ns.cloudflare.com). It was registered on 8 April 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 52.58.112.89 is hosted by Amazon.com, Inc. (AS16509) in Germany. Mail is handled by dfbf-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 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 |
|---|---|---|---|---|---|---|---|
| 52.58.112.89 | 300s | ec2-52-58-112-89.eu-central-1.compute.amazonaws.com | AS16509 | Amazon.com, Inc. | 52.56.0.0/14 | 🇩🇪 Germany | Frankfurt am Main |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| google-site-verification=ssFxKtGll-6tspgfhp6qtmuju7V4-8jnSro_lPlLn7k |
| MS=ms76055790 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (dfbf.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.dfbf.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;rua=mailto:pww1ojem@ag.eu.dmarcian.com; ruf=mailto:pww1ojem@fr.eu.dmarcian.com;fo=1 |
| Flags | Tag | Value |
|---|---|---|
| 0 | issue | comodoca.com |
| 0 | issue | digicert.com; cansignhttpexchanges=yes |
| 0 | issue | letsencrypt.org |
| 0 | issue | pki.goog; cansignhttpexchanges=yes |
| 0 | issue | sectigo.com |
| 0 | issue | ssl.com |
| 0 | issuewild | comodoca.com |
| 0 | issuewild | digicert.com; cansignhttpexchanges=yes |
| 0 | issuewild | letsencrypt.org |
| 0 | issuewild | pki.goog; cansignhttpexchanges=yes |
| 0 | issuewild | ssl.com |
| www CNAME | dfbf.dk (all on dfbf.dk) → 52.58.112.89 (AS16509) |
| www vs bare domain | Same network |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u4171000.wl001.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u4171000.wl001.sendgrid.net | RSA · ~1024 bit below 2048 bit |
| selector1 | selector1-dfbf-dk._domainkey.euronext.onmicrosoft.com | RSA · ~2048 bit |
| selector2 | selector2-dfbf-dk._domainkey.euronext.onmicrosoft.com | 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: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.dfbf.dk | PbSJ9xraB55QYu0SLXaCwTl7eUikoKaiphRhUEVZOWc |
| TXT | _acme-challenge.dfbf.dk | qRtPBM-o5Qjz8sEpXhoe2r1y5d14KNbpQe1jtf28_Y8 |
| 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 | 2413750162 |
| Primary NS (MNAME) | dilbert.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | MarkMonitor Inc. |
| Registered | 2019-04-08 |
| Expires | 2027-04-30 (195d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 01:14:07 | 1140ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-10-02 17:00:31 | 1258ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-30 21:44:09 | 955ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-24 11:40:18 | 1346ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-14 22:57:46 | 2868ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-07 21:33:24 shown | 2162ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-28 09:08:30 | 1065ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-20 17:27:00 | 1353ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-08-20 17:26:17 | 8287ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-07-12 17:27:03 | 2768ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-27 18:08:00 | 1889ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-25 12:54:29 | 2365ms | 2 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-24 09:06:45 | 1157ms | 2 NS 1 A 1 MX | ❓ Unknown |
| 2026-06-17 02:36:09 | 885ms | 2 NS 1 A 1 MX | 🔓 Insecure |