nerenst.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 22 July 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.106.165.30 is hosted by Fiberby ApS (AS42541) in Denmark. Mail is handled by mail.itiot.dk. The zone is DNSSEC-signed and validates, 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.
| IP | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 193.106.165.30 | 43200s | mail.itiot.dk | AS42541 | Fiberby ApS | 193.106.164.0/22 | 🇩🇰 Denmark | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 43200s | mail.itiot.dk | 193.106.165.30 | mail.itiot.dk | AS42541 Fiberby ApS |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | nerenst.dk → 193.106.165.30 |
| 🔶 Autoconfig | nerenst.dk → 193.106.165.30 |
| TXT Record |
|---|
| v=spf1 a:mail.itiot.dk -all |
| Policy | Record (nerenst.dk) |
|---|---|
| -all (hard fail) | v=spf1 a:mail.itiot.dk -all |
| Policy | Record (_dmarc.nerenst.dk) |
|---|---|
| p=quarantine | v=DMARC1; p=quarantine; rua=mailto:nanna@nerenst.dk; pct=100 |
| www CNAME | nerenst.dk (all on nerenst.dk) |
| www vs bare domain | Same network |
| Wildcard | Yes: any name under the zone resolves |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| dkim | — | 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: 1/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.nerenst.dk | nerenst.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2026081802 |
| 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 | 2019-07-22 |
| Expires | 2027-07-31 (278d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-10-08 00:12:59 | 536ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-10-05 01:02:29 | 722ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-25 23:12:27 | 693ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-21 06:36:06 | 1178ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-09-07 17:57:36 | 1036ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-22 21:13:25 | 6909ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-19 20:34:27 shown | 6831ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-18 20:22:53 | 2567ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-08-07 21:46:50 | 6829ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-07-04 10:49:58 | 763ms | 2 NS 1 A 1 MX | 🔒 Secure |
| 2026-06-17 12:00:14 | 1019ms | 2 NS 1 A 1 MX | 🔒 Secure |