matematikcenter.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 24 August 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 176.57.89.144 is hosted by Telia Cygate AB (AS197308) in Sweden. Mail is handled by matematikcenter-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 176.57.89.144 | 3600s | — | AS197308 | Telia Cygate AB | 176.57.88.0/22 | 🇸🇪 Sweden | Stockholm |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover.outlook.com → 40.104.116.8 |
| 🔶 Autoconfig | maildiscover.simply.com → 94.231.108.222 |
| Service | Priority | Weight | Port | Target |
|---|---|---|---|---|
| _autodiscover._tcp | 10 | 10 | 443 | maildiscover.simply.com |
| _sipfederationtls._tcp | 100 | 1 | 5061 | sipfed.online.lync.com |
| TXT Record |
|---|
| google-site-verification=heRHz5DvhFGb8mECr_4luEGe6Qxtc93QNtS6E12KhfM |
| google-site-verification=LiE0Q6qVtcpOr7xRLGC9ac9-Obr5y1deCeOOHzenU7Y |
| google-site-verification=WAvM-1iZbgRFH-yQfTHjWDvndZSQ5Dbnvb3yGaYVxhk |
| MS=ms92502050 |
| v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all |
| Policy | Record (matematikcenter.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all |
| www | 176.57.89.144 (AS197308) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| Denial of existence | NSEC zone can be walked (all names enumerable) |
| CDS / CDNSKEY | Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY |
DNS lookups: 2/10 · 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 | 2025111800 |
| Primary NS (MNAME) | ns1.simply.com |
| Responsible (RNAME) | hostmaster@simply.com |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 3600s |
| Field | Value |
|---|---|
| Registrar | Simply.com A/S |
| Registered | 2011-08-24 |
| Expires | 2027-08-31 (311d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-22 18:10:30 | 623ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 00:39:52 | 743ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-30 00:20:08 | 1019ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-23 02:10:00 | 1434ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-23 23:38:15 shown | 17217ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-02 15:41:56 | 739ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-20 17:54:44 | 1370ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-18 01:33:49 | 949ms | 4 NS 1 A 1 MX | 🔒 Secure |