grading.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 8 February 2021 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 213.184.84.11 is hosted by PerfGrid (AS59795) in The Netherlands. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. The zone is DNSSEC-signed and validates, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 213.184.84.11 | 60s | nlsh06.shared-infra.net | AS59795 | PerfGrid | 213.184.84.0/23 | 🇳🇱 The Netherlands | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 10 | 3600s | mx1.onlinemail.io | 185.21.42.12 | mx1.onlinemail.io | AS48854 team.blue Denmark A/S |
| 20 | 3600s | mx2.onlinemail.io | 46.36.208.16 | mx2.onlinemail.io | AS48854 team.blue Denmark A/S |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | autodiscover-mf.onlinemail.io → 185.21.40.62 |
| 🔶 Autoconfig | autoconfig-mf.onlinemail.io → 185.21.40.62 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2a09:3a00:4011::1 | 60s | — | AS59795 | PerfGrid | 2a09:3a00:4000:0:0:0:0:0/40 | 🇳🇱 The Netherlands | — |
| TXT Record |
|---|
| brevo-code:e6760f9636740825cf6cd492236ad966 |
| v=spf1 include:spf.onlinemail.io include:spf-record.net -all |
| Policy | Record (grading.dk) |
|---|---|
| -all (hard fail) | v=spf1 include:spf.onlinemail.io include:spf-record.net -all |
| Policy | Record (_dmarc.grading.dk) |
|---|---|
| p=none (monitor only) | v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com |
| www | 213.184.84.11 2a09:3a00:4011::1 (AS59795) (address records, no CNAME) |
| www vs bare domain | Same network grading.dk: 213.184.84.11 2a09:3a00:4011::1 (AS59795) www.grading.dk: 213.184.84.11 2a09:3a00:4011::1 (AS59795) |
| Wildcard | No |
| Denial of existence | NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt |
| CDS / CDNSKEY | None 0 CDS, 0 CDNSKEY |
| Selector | CNAME | Key |
|---|---|---|
| default | — | RSA · ~1024 bit below 2048 bit |
| — | RSA · ~1024 bit below 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: 5/10 · policy: -all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.grading.dk | 40247cee-d2dc-48cd-a2f7-8fe689e69bad.auth.acme-challenge.dk |
| Check | Result |
|---|---|
| Validation Status | 🔒 Secure |
| AD Flag (resolver validates) | ✓ Set |
| DS Record | ✓ Found |
| DNSKEY Record | ✓ Found |
| Flags | fully validated |
| Field | Value |
|---|---|
| Serial | 2025052702 |
| Primary NS (MNAME) | ns1.curanet.dk |
| Responsible (RNAME) | hostmaster@curanet.dk |
| Refresh | 14400s |
| Retry | 3600s |
| Expire | 1209600s |
| Minimum (neg-cache TTL) | 300s |
| Field | Value |
|---|---|
| Registrar | Punktum dk A/S (direct) |
| Registered | 2021-02-08 |
| Expires | 2027-02-28 (133d) |
| Scanned At | Duration | Records | DNSSEC |
|---|---|---|---|
| 2026-09-30 16:51:48 shown | 488ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-18 02:40:18 | 550ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-09-03 16:58:01 | 590ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-26 08:59:45 | 952ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-08-25 13:05:57 | 718ms | 2 NS 1 A 2 MX | 🔒 Secure |
| 2026-06-17 10:00:44 | 1117ms | 2 NS 1 A 2 MX | 🔒 Secure |