cicero.dk is a .dk domain served by 4 nameservers (ns1-02.azure-dns.com, ns2-02.azure-dns.net, ns3-02.azure-dns.org and 1 more). It was registered on 25 January 2001 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 86.58.160.144 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by cicero-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 |
|---|---|---|---|
| ns1-02.azure-dns.com | — | — | — |
| ns2-02.azure-dns.net | — | — | — |
| ns3-02.azure-dns.org | — | — | — |
| ns4-02.azure-dns.info | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 86.58.160.144 | — | — | AS47292 | Sentia Denmark A/S | 86.58.160.0/21 | 🇩🇰 Denmark | Glostrup Municipality |
| TXT Record |
|---|
| MS=ms65666037 |
| v=msv1 t=B41022F0-6DA1-43EA-A29D-0089AA3D57F7 |
| v=spf1 ip4:86.58.159.10 ip4:86.58.159.30 ip4:86.58.159.31 include:spf.protection.outlook.com -all |
| Policy | Record (cicero.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:86.58.159.10 ip4:86.58.159.30 ip4:86.58.159.31 include:spf.protection.outlook.com -all |
| Policy | Record (_dmarc.cicero.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; rua=mailto:62de94a87c3dc@dmarc.centerasecurity.com; |
| www | 86.58.160.144 (AS47292) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| Denial of existence | Compact NSEC (RFC 9824, "black lies") not walkable |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
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 | 2017111700 |
| Primary NS (MNAME) | ns1-02.azure-dns.com |
| Responsible (RNAME) | hostmaster@gyldendal.dk |
| Refresh | 3600s |
| Retry | 600s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | WEB SOLUTIONS A/S |
| Registered | 2001-01-25 |
| Expires | 2027-03-31 (162d) |
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 |
|---|---|---|---|
| 2026-09-30 20:54:56 | 1269ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-19 17:44:54 | 1283ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-28 00:46:37 | 1434ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-02 00:29:43 | 1013ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-16 20:45:38 shown | 673ms | 4 NS 1 A 1 MX | 🔒 Secure |