eisenstein.dk is a .dk domain served by 5 nameservers (ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com and 2 more). It was registered on 7 February 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 13.248.158.7 is hosted by Amazon.com, Inc. (AS16509) in United States. The zone is not DNSSEC-signed, 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.yahoo.com | — | — | — |
| ns2.yahoo.com | — | — | — |
| ns3.yahoo.com | — | — | — |
| ns4.yahoo.com | — | — | — |
| ns5.yahoo.com | — | — | — |
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 13.248.158.7 | — | a7de0457831fd11f7.awsglobalaccelerator.com | AS16509 | Amazon.com, Inc. | 13.248.0.0/14 | 🇺🇸 United States | — |
| 76.223.84.192 | — | a7de0457831fd11f7.awsglobalaccelerator.com | AS16509 | Amazon.com, Inc. | 76.223.0.0/17 | 🇺🇸 United States | — |
| TXT Record |
|---|
| 'Digicert - itsecurity@teamaol.com' |
| Policy | Record (_dmarc.eisenstein.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; pct=100; rua=mailto:dmarc-yahoo-rua@yahoo-inc.com; |
| Flags | Tag | Value |
|---|---|---|
| 0 | iodef | mailto:security@yahooinc.com |
| 0 | issue | ; |
| www CNAME | eisenstein.dk (all on eisenstein.dk) |
| www vs bare domain | Same network eisenstein.dk: 13.248.158.7 76.223.84.192 (AS16509) www.eisenstein.dk: 13.248.158.7 76.223.84.192 (AS16509) |
| Wildcard | No |
| Check | Result |
|---|---|
| Validation Status | 🔓 Insecure |
| AD Flag (resolver validates) | ✗ Not set |
| DS Record | ✗ Not found |
| DNSKEY Record | ✗ Not found |
| Flags | unsigned answer |
| Field | Value |
|---|---|
| Serial | 2024031302 |
| Primary NS (MNAME) | hidden-master.yahoo.com |
| Responsible (RNAME) | hostmaster@yahoo-inc.com |
| Refresh | 28800s |
| Retry | 900s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 600s |
| Field | Value |
|---|---|
| Registrar | MarkMonitor Inc. |
| Registered | 2000-02-07 |
| Expires | 2027-03-31 (165d) |
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 |
|---|---|---|---|
| 2026-10-07 17:57:53 | 3587ms | 5 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-05 18:36:15 | 14488ms | 5 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-03 19:01:49 | 8732ms | 5 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-26 05:10:04 | 13751ms | 5 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-27 05:25:32 | 2388ms | 5 NS 2 A 1 MX | 🔓 Insecure |
| 2026-06-17 06:28:31 shown | 566ms | 5 NS 2 A 0 MX | 🔓 Insecure |
| 2026-06-17 06:20:04 | 597ms | 5 NS 2 A 0 MX | 🔓 Insecure |