bcsyd.dk is a .dk domain served by 2 nameservers (ns1.esis.dk, ns2.esis.dk). It was registered on 6 October 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.42.65 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by bcsyd-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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.
| Nameserver | IP addresses | PTR | ASN / ISP |
|---|---|---|---|
| ns1.esis.dk | 185.19.134.2 | ns1.esis.dk | AS199374 Syddansk Erhvervsskole Odense-Vejle |
| ns2.esis.dk | 185.19.134.3 | ns2.esis.dk | AS199374 Syddansk Erhvervsskole Odense-Vejle |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 185.21.42.65 | 43200s | vm1379.enterprisecloud.nu | AS48854 | team.blue Denmark A/S | 185.21.40.0/22 | 🇩🇰 Denmark | — |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 185.19.134.13 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _sipfederationtls._tcp | 10 | 100 | 5061 | sip.bcsyd.dk |
| TXT Record |
|---|
| adobe-idp-site-verification=bdd2c7646947bd6ed4e5c8273f6ff3fe4365b433293b5d6cf2320f5065b9cf3f |
| apple-domain-verification=r14u77lMY0B6D1GO |
| google-site-verification=HEjoVag98G2mFiEFJGYyREu5KFyFaq_BVedG4JV17Mg |
| have-i-been-pwned-verification=20e0a8ef5be76a650b5bb21018356540 |
| hibp-verify=dweb_qms2mruo8iy0pyet6rbsqtsb |
| MS=ms11631288 |
| MS=ms61833148 |
| MS=ms65404050 |
| uvmid=537402 |
| v=spf1 ip4:195.231.241.19 ip4:195.231.239.247 ip4:195.231.242.131 ip4:185.19.134.5 ip4:46.32.40.43 ip4:185.21.42.65 ip4:185.16.17.219 ip4:185.16.17.220 ip4:185.19.134.6 ip4:185.19.134.13 include:servers.mcsv.net include:spf.protection.outlook.com include:spf.mandrillapp.com include:sparkpostmail.com include:_spf-hosting.eg.dk include:spf.mailjet.com ~all |
| Policy | Record (bcsyd.dk) |
|---|---|
| ~all (soft fail) | v=spf1 ip4:195.231.241.19 ip4:195.231.239.247 ip4:195.231.242.131 ip4:185.19.134.5 ip4:46.32.40.43 ip4:185.21.42.65 ip4:185.16.17.219 ip4:185.16.17.220 ip4:185.19.134.6 ip4:185.19.134.13 include:servers.mcsv.net include:spf.protection.outlook.com include:spf.mandrillapp.com include:sparkpostmail.com include:_spf-hosting.eg.dk include:spf.mailjet.com ~all |
| Policy | Record (_dmarc.bcsyd.dk) |
|---|---|
| p=reject | v=DMARC1;p=reject;sp=reject;rua=mailto:be7762a8bd@rua.easydmarc.eu;ruf=mailto:be7762a8bd@ruf.easydmarc.eu;fo=1 |
| www | 185.21.42.65 (AS48854) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| selector1 | selector1-bcsyd-dk._domainkey.businesscollegesyd.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: 7/10 · 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 | 2021113601 |
| Primary NS (MNAME) | ns1.esis.dk |
| Responsible (RNAME) | hostmaster@esis.dk |
| Refresh | 900s |
| Retry | 600s |
| Expire | 86400s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2004-10-06 |
| Expires | 2027-07-31 (287d) |
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).
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-17 01:29:04 | 3321ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-16 00:16:13 | 1017ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-14 22:18:11 | 1160ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-12 20:01:59 shown | 2944ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-08 11:07:25 | 3725ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-07 10:59:10 | 1072ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-06 10:06:19 | 3226ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-04 07:45:26 | 1136ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 07:42:13 | 1450ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 07:24:23 | 4959ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-29 07:08:57 | 1556ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-28 07:02:58 | 918ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 06:38:39 | 4388ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-26 06:17:33 | 1051ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 06:06:02 | 1217ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-24 05:38:57 | 1487ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-22 14:02:58 | 953ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-21 10:35:44 | 1390ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-16 14:12:47 | 1878ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-12 08:54:00 | 1033ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-06 21:07:28 | 4030ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-04 13:29:09 | 1082ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-31 09:18:04 | 2726ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-30 02:49:35 | 1860ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 07:25:13 | 1140ms | 2 NS 1 A 1 MX | 🔒 Secure |