business-institute.dk is a .dk domain served by 2 nameservers (lady.ns.cloudflare.com, yahir.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.0.160 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by businessinstitute-dk02b.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.0.160 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.151.69 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.24 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3030::6815:a0 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3037::ac43:9745 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.0.160,172.67.151.69 ech=AEX+DQBBygAgACAFAy49/FcGkfmoW9b1T7E7u3RQ/U8Nt4mNfRW75BfQMgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::6815:a0,2606:4700:3037::ac43:9745 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 1 | 1 | 443 | remote.business-institute.dk |
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| _globalsign-domain-verification=ILR8fcO_uWm9XLABtPcQVLi99SVvTGn8BTuON_ov_r |
| apple-domain-verification=v0Gx2aImmVO0vos1 |
| facebook-domain-verification=4j6mhzaw7bgi51z777sejeazk3wnkp |
| google-site-verification=4bHCq27NCWkZCnRhUzjbVShMlE8L1OpeP7cqBcRHZsc |
| google-site-verification=LE7QOeaEDyHQ5Wp35goJl9wA5PK6EBETh6tmZhXZjdk |
| google-site-verification=v1ORlpaOC-awMufspLe1OAHS_rDv_Prrkwu3B1EtdfI |
| MS=ms73865069 |
| MS=ms90765424 |
| v=spf1 include:spf.protection.outlook.com include:_spf.online.superoffice.com include:spf.jcdhotel.dk include:_custspf.one.com include:spf.eu.signature365.net ~all |
| Policy | Record (business-institute.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:spf.protection.outlook.com include:_spf.online.superoffice.com include:spf.jcdhotel.dk include:_custspf.one.com include:spf.eu.signature365.net ~all |
| Policy | Record (_dmarc.business-institute.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:rua+z2k4ts6na4oz@dmarcwise.email; fo=1; |
| Status | Report address (rua) |
|---|---|
| ✓ Enabled | mailto:rua+z2k4ts6na4oz@dmarcwise.email |
| www | 104.21.0.160 172.67.151.69 2606:4700:3030::6815:a0 2606:4700:3037::ac43:9745 (AS13335) (address records, no CNAME) |
| www vs bare domain | Same network business-institute.dk: 104.21.0.160 172.67.151.69 2606:4700:3030::6815:a0 2606:4700:3037::ac43:9745 (AS13335) www.business-institute.dk: 104.21.0.160 172.67.151.69 2606:4700:3030::6815:a0 2606:4700:3037::ac43:9745 (AS13335) |
| Wildcard | No |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u24695452.wl203.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u24695452.wl203.sendgrid.net | RSA · ~2048 bit |
| selector1 | selector1-businessinstitute-dk02b._domainkey.f5dk365.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: 6/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.business-institute.dk | HRnqcf1xkcjVpz9l7kFuJ9ASaIHkU1R1HezfpKeDpm4 |
| TXT | _acme-challenge.business-institute.dk | JUQ6Ri50sVqziFFvrxjxk8X-fD5SmRCWp6k8M_E9-tw |
| 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 | 2415806129 |
| Primary NS (MNAME) | lady.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 07:01:59 shown | 1299ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-26 01:32:07 | 1790ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-25 01:22:37 | 9751ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-24 18:51:09 | 1360ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-29 20:58:08 | 3184ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-25 16:32:13 | 1845ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-27 07:32:14 | 3018ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-07-01 07:41:26 | 1627ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-29 07:18:20 | 1434ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-26 07:05:35 | 1575ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-25 07:38:57 | 3133ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-22 23:25:14 | 3872ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-21 09:09:56 | 1142ms | 0 NS 0 A 0 MX | ❓ Unknown |
| 2026-06-20 16:03:18 | 2288ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-16 17:50:42 | 784ms | 2 NS 2 A 1 MX | 🔓 Insecure |