brenderuphojskole.dk is a .dk domain served by 2 nameservers (coco.ns.cloudflare.com, jeff.ns.cloudflare.com). It was registered on 14 March 2005 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.14.164 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by brenderuphojskole-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 |
|---|---|---|---|---|---|---|---|
| 104.21.14.164 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.160.15 | 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 |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::ac43:a00f | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3035::6815:ea4 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| TXT Record |
|---|
| MS=ms66095640 |
| v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (brenderuphojskole.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.brenderuphojskole.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:8d71262b6349492586cfda756e9d0882@dmarc-reports.cloudflare.net |
| www CNAME | brenderuphojskole.com (all on brenderuphojskole.com) |
| www vs bare domain | Same network brenderuphojskole.dk: 104.21.14.164 172.67.160.15 2606:4700:3033::ac43:a00f 2606:4700:3035::6815:ea4 (AS13335) www.brenderuphojskole.dk: 104.21.14.164 172.67.160.15 2606:4700:3033::ac43:a00f 2606:4700:3035::6815:ea4 (AS13335) |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u53045132.wl133.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u53045132.wl133.sendgrid.net | RSA · ~2048 bit |
| selector1 | — | 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| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2416162497 |
| Primary NS (MNAME) | coco.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 | 2005-03-14 |
| Expires | 2027-03-31 (163d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 06:15:37 shown | 1506ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-19 20:12:38 | 1389ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-13 22:52:40 | 1484ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-08 23:28:18 | 782ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-09-06 17:12:39 | 1105ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-28 07:25:52 | 963ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-08-14 05:48:33 | 6633ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-21 01:47:15 | 9320ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-07-08 09:58:17 | 26648ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-26 01:44:15 | 950ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-20 04:43:11 | 864ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-20 02:51:40 | 892ms | 2 NS 2 A 1 MX | 🔒 Secure |
| 2026-06-16 16:50:28 | 2713ms | 2 NS 2 A 1 MX | 🔒 Secure |