rational.dk is a .dk domain served by 4 nameservers (dns1.p05.nsone.net, dns2.p05.nsone.net, dns3.p05.nsone.net and 1 more). It was registered on 25 June 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 199.46.34.76 is hosted by Akamai International B.V. (AS213120) in United States. Mail is handled by .. The zone is not DNSSEC-signed, 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 |
|---|---|---|---|---|---|---|---|
| 199.46.34.76 | 7200s | — | AS213120 | Akamai International B.V. | 199.46.32.0/19 | 🇺🇸 United States | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 86400s | . Null MX — domain accepts no email (RFC 7505) | |||
| TXT Record |
|---|
| v=spf1 mx/24 -all |
| Visit www.ibm.com for information about IBM products and services |
| Policy | Record (rational.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx/24 -all |
| Policy | Record (_dmarc.rational.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com |
| www CNAME | redirect.www.ibm.com (all on ibm.com) → 199.46.34.76 (AS213120) |
| www vs bare domain | Same network |
| Wildcard | No |
DNS lookups: 1/10 · policy: -all
No problems found| 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 | 1725379640 |
| Primary NS (MNAME) | dns1.p01.nsone.net |
| Responsible (RNAME) | hostmaster@nsone.net |
| Refresh | 43200s |
| Retry | 7200s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 86400s |
| Field | Value |
|---|---|
| Registrar | CSC Digital Brand Service, Inc |
| Registered | 1997-06-25 |
| Expires | 2027-06-30 (256d) |
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).
No other domain with this registrant in our WHOIS data yet| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-06 13:42:15 shown | 9499ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-09-01 08:17:28 | 693ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-21 05:59:25 | 616ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-20 05:40:55 | 2414ms | 4 NS 1 A 1 MX | 🔓 Insecure |
| 2026-06-17 13:18:17 | 2087ms | 4 NS 1 A 0 MX | 🔓 Insecure |