symbion.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 21 March 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 141.193.213.10 is hosted by Cloudflare London, LLC (AS209242) in United States. Mail is handled by mailgw.sbshosting.dk. The zone is DNSSEC-signed and validates, publishes a DMARC policy and has no IPv6 address. 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 |
|---|---|---|---|---|---|---|---|
| 141.193.213.10 | 600s | — | AS209242 | Cloudflare London, LLC | 141.193.213.0/24 | 🇺🇸 United States | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 600s | mailgw.sbshosting.dk | 5.57.55.126 | mailgw.sbshosting.dk | AS198608 Symbion A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | 5.57.51.31 |
| TXT Record |
|---|
| 1password-site-verification=TL4UQVISDFFEVGUGCGR5HXJHFA |
| google-site-verification=riaF5jBkhhFhv8anc7q_1_OcQpYKsmKwZp1gWZCr7Wc |
| MS=E45DAE216553AE65E4DE46675786AE0B1CE3AF25 |
| v=spf1 a include:spf.symbion.dk include:spf.protection.outlook.com include:servers.mcsv.net include:mailgun.org include:spf.sbshosting.dk -all |
| Policy | Record (symbion.dk) |
|---|---|
| -all (hard fail) | v=spf1 a include:spf.symbion.dk include:spf.protection.outlook.com include:servers.mcsv.net include:mailgun.org include:spf.sbshosting.dk -all |
| Policy | Record (_dmarc.symbion.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none |
| www CNAME | symbion.dk (all on symbion.dk) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| k1 | dkim.mcsv.net | RSA · ~1024 bit below 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: 10/10 · policy: -all
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026100801 |
| Primary NS (MNAME) | ns01.one.com |
| Responsible (RNAME) | hostmaster@one.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 1996-03-21 |
| Expires | 2027-03-31 (164d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 11:26:14 shown | 797ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-07 11:14:11 | 447ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-04 09:48:50 | 598ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-03 09:46:29 | 522ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-03 13:10:13 | 762ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-29 01:45:12 | 1005ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 23:23:41 | 588ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-24 18:31:00 | 977ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-19 06:04:48 | 935ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 15:08:41 | 522ms | 2 NS 1 A 1 MX | ❓ Unknown |