tier1.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 14 March 2017 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 80.209.35.226 is hosted by FIBIA P/S (AS44869) in Denmark. Mail is handled by tier1.dk. The zone is DNSSEC-signed and validates, has no 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 |
|---|---|---|---|---|---|---|---|
| 80.209.35.226 | 3600s | 80.209.35.226.static.fibianet.dk | AS44869 | FIBIA P/S | 80.209.0.0/17 | 🇩🇰 Denmark | Åbyhøj |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | tier1.dk | 80.209.35.226 | 80.209.35.226.static.fibianet.dk | AS44869 FIBIA P/S |
| TXT Record |
|---|
| v=DMARC1; p=none; sp=none; rf=afrf; pct=100; ri=86400 |
| v=spf1 mx a ip4:5.103.128.179/32 -all |
| Policy | Record (tier1.dk) |
|---|---|
| -all (hard fail) | v=spf1 mx a ip4:5.103.128.179/32 -all |
| www | 80.209.35.226 (AS44869) (address records, no CNAME) |
| www vs bare domain | Same network |
| Wildcard | No |
| 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| Type | Name | Value |
|---|---|---|
| TXT | _acme-challenge.tier1.dk | CLy_cLfRBZkKu_0xp5u2wPNelV5qfNZhxZuAGxCJIdo |
| TXT | _acme-challenge.tier1.dk | OGtvCB_5LkncBD06ifsHGw8_0gr90utNeW9DYDUSVE8 |
| TXT | _acme-challenge.tier1.dk | Xp0Drsz7DXJiK6cVtQYzUnVw8YBbMwbMTlonelsFXm4 |
| TXT | _acme-challenge.tier1.dk | mqqaGYo9ckKtUKCBWVnkfBWbODPKfN2XhTj1WgkWRBQ |
| TXT | _acme-challenge.tier1.dk | tJHbwFTracHE1nvXK__veFFaxzRIuN4IkG-YDPbzMpU |
| TXT | _acme-challenge.tier1.dk | ziRIhw3LLC83d619vGP1InAp3OuoGJTJJRV8EDt0nqk |
| TXT | _acme-challenge.tier1.dk | zveXTcABxKQR83Atrai3abOs8oegvyfme9AabFi1HWk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026101200 |
| 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 | 2017-03-14 |
| Expires | 2027-03-31 (162d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-12 16:38:28 shown | 609ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-09 12:05:17 | 672ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-02 10:44:40 | 599ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-27 10:12:21 | 865ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-27 14:29:25 | 573ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-26 15:50:51 | 2565ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-06 12:08:01 | 1554ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-02 09:59:06 | 734ms | 4 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 22:18:00 | 630ms | 4 NS 1 A 1 MX | 🔒 Secure |