fiu.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 12 February 1997 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 81.7.170.141 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by mx12.electric.net, mx6.electric.net. 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 |
|---|---|---|---|---|---|---|---|
| 81.7.170.141 | 3600s | — | AS47292 | Sentia Denmark A/S | 81.7.168.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | mx12.electric.net | 192.162.219.49 2a01:77c0:1619:4101:d99:c22:fb4d:290e |
mx41.electric.net mx10.electric.net |
AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. |
| 20 | 43200s | mx6.electric.net | 192.162.219.49 | mx41.electric.net | AS16509 Amazon.com, Inc. |
| TXT Record |
|---|
| LO's FIU afdeling |
| MS=ms84245213 |
| v=spf1 ip4:193.28.224.0/24 ip4:81.7.161.0/24 ip4:86.58.180.0/24 include:spf.mailanyone.net include:bounce.peytz.dk include:_spf.anpdm.com include:_smtpcluster.jay.net -all |
| Policy | Record (fiu.dk) |
|---|---|
| -all (hard fail) | v=spf1 ip4:193.28.224.0/24 ip4:81.7.161.0/24 ip4:86.58.180.0/24 include:spf.mailanyone.net include:bounce.peytz.dk include:_spf.anpdm.com include:_smtpcluster.jay.net -all |
| Policy | Record (_dmarc.fiu.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; |
| p=reject | v=DMARC1; p=reject; rua=mailto:dmarc@2cm70nkt.uriports.com; ruf=mailto:dmarc@2cm70nkt.uriports.com; fo=1:d:s |
| www | 195.47.247.18 (AS51468) (address records, no CNAME) |
| www vs bare domain | Different networks (all like this) |
| Wildcard | No |
| Denial of existence | NSEC3 · 0 iterations · no salt RFC 9276 ✓ |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| s1 | s1.domainkey.u40221897.wl148.sendgrid.net | RSA · ~2048 bit |
| s2 | s2.domainkey.u40221897.wl148.sendgrid.net | RSA · ~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: 4/10 · 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 | 2026101201 |
| 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 | 1997-02-12 |
| Expires | 2027-03-31 (165d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-13 04:51:18 shown | 1355ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-08 13:44:33 | 1303ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-07 13:40:04 | 2617ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-06 06:48:46 | 2252ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-10-01 05:52:58 | 1094ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-24 03:27:01 | 1138ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-14 19:26:35 | 2562ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-07 17:29:12 | 1457ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-25 06:31:11 | 735ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-12 10:32:31 | 2821ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-23 08:09:37 | 5063ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-18 08:11:28 | 3473ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-16 06:16:03 | 1048ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-14 06:41:51 | 1284ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-07-08 11:00:39 | 1590ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-23 03:55:08 | 2259ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 10:09:02 | 2318ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 10:08:39 | 1875ms | 2 NS 1 A 2 MX | 🔒 Secure |