calendra.dk is a .dk domain served by 2 nameservers (gwen.ns.cloudflare.com, johnathan.ns.cloudflare.com). It was registered on 14 August 2026 (WHOIS) and first appeared in the .dk zone on 15 August 2026. Its website address 104.21.93.198 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mailserver.purelymail.com. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 |
|---|---|---|---|---|---|---|---|
| 104.21.93.198 | 300s | — | AS13335 | Cloudflare, Inc. | 104.21.0.0/17 | — | — |
| 172.67.214.52 | 300s | — | AS13335 | Cloudflare, Inc. | 172.67.128.0/17 | — | — |
| Priority | TTL | Mail Server | IP addresses | PTR | ASN |
|---|---|---|---|---|---|
| 0 | 300s | mailserver.purelymail.com | 18.204.123.63 | ec2-18-204-123-63.compute-1.amazonaws.com | AS14618 Amazon.com, Inc. |
| Service | CNAME / IP |
|---|---|
| 🔷 Autodiscover | d573ik9u.up.railway.app → 69.46.46.16 |
| 🔶 Autoconfig | d573ik9u.up.railway.app → 69.46.46.16 |
| IPv6 Address | TTL | PTR | ASN | ISP / Org | CIDR | Country | City |
|---|---|---|---|---|---|---|---|
| 2606:4700:3033::6815:5dc6 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| 2606:4700:3034::ac43:d634 | 300s | — | AS13335 | Cloudflare, Inc. | 2606:4700:3000:0:0:0:0:0/42 | — | — |
| Priority | Target | SvcParams |
|---|---|---|
| 1 service | . | alpn="h3,h2" ipv4hint=104.21.93.198,172.67.214.52 ech=AEX+DQBBDAAgACDJ97/zr6EzxmF4bB5xQKnHIDzdZoXnTmhe8btt+I57LgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::6815:5dc6,2606:4700:3034::ac43:d634 |
| TXT Record |
|---|
| purelymail_ownership_proof=e5397fdc4a06608a13ed49aed0a24a0ba43c85cd3e305163829ef8ebcfdded26be1784fb3e6cea21f62cc51cfea37efe958a355efbf8c92470f473df659cf31c |
| v=spf1 include:_spf.purelymail.com ~all |
| Policy | Record (calendra.dk) |
|---|---|
| ~all (soft fail) | v=spf1 include:_spf.purelymail.com ~all |
| Policy | Record (_dmarc.calendra.dk) |
|---|---|
| p=reject | v=DMARC1; p=reject; ruf=mailto:dmarc@purelymail.com |
| www CNAME | d573ik9u.up.railway.app (all on railway.app) → 69.46.46.16 (AS400940) |
| www vs bare domain | Different networks calendra.dk: 104.21.93.198 172.67.214.52 2606:4700:3033::6815:5dc6 2606:4700:3034::ac43:d634 (AS13335) (all like this)www.calendra.dk: 69.46.46.16 (AS400940) |
| Wildcard | Yes: any name under the zone resolves |
DNS lookups: 1/10 · policy: ~all
No problems found| Type | Name | Value |
|---|---|---|
| CNAME | _acme-challenge.calendra.dk | d573ik9u.authorize.railwaydns.net |
| TXT | d573ik9u.authorize.railwaydns.net | TP_PAwSzXJW9ri5m_LqppJOhU9JgOibKd6_X_sVlfuU |
| 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 | 2412259024 |
| Primary NS (MNAME) | gwen.ns.cloudflare.com |
| Responsible (RNAME) | dns@cloudflare.com |
| Refresh | 10000s |
| Retry | 2400s |
| Expire | 604800s |
| Minimum (neg-cache TTL) | 1800s |
| Field | Value |
|---|---|
| Registrar | ONE.COM A/S |
| Registered | 2026-08-14 |
| Expires | 2027-08-13 (299d) |
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 |
|---|---|---|---|
| 2026-10-14 16:44:26 | 1059ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-10-13 15:23:36 | 2887ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-30 13:14:50 | 883ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-29 23:22:40 | 995ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-09-24 10:40:39 | 995ms | 2 NS 2 A 1 MX | 🔓 Insecure |
| 2026-08-15 08:39:53 shown | 6429ms | 2 NS 2 A 1 MX | 🔓 Insecure |