useful.dk

📜 Historical scan 2026-06-21 04:13:03  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

useful.dk is a .dk domain served by 2 nameservers (duke.ns.cloudflare.com, keyla.ns.cloudflare.com). It was registered on 23 April 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.54.126 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is DNSSEC-signed and validates, 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.

🖥️ Nameservers#

2 records   69ms
NameserverIP addressesPTRASN / ISP
duke.ns.cloudflare.com 108.162.193.110
172.64.33.110
173.245.59.110
2606:4700:58::adf5:3b6e
2803:f800:50::6ca2:c16e
2a06:98c1:50::ac40:216e		 duke.ns.cloudflare.com
duke.ns.cloudflare.com
duke.ns.cloudflare.com
duke.ns.cloudflare.com
—
duke.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
keyla.ns.cloudflare.com 108.162.194.170
162.159.38.170
172.64.34.170
2606:4700:50::a29f:26aa
2803:f800:50::6ca2:c2aa
2a06:98c1:50::ac40:22aa		 keyla.ns.cloudflare.com
keyla.ns.cloudflare.com
keyla.ns.cloudflare.com
keyla.ns.cloudflare.com
keyla.ns.cloudflare.com
keyla.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.

🌍 A Records#

2 records   55ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.21.54.126 300s — AS13335 Cloudflare, Inc. 104.21.0.0/17 — —
172.67.138.138 300s — AS13335 Cloudflare, Inc. 172.67.128.0/17 — —

📧 MX Records#

5 records   73ms
PriorityTTLMail ServerIP addressesPTRASN
1 3600s aspmx.l.google.com 142.251.127.27
2a00:1450:4001:c21::1b		 lcfrai-in-f27.1e100.net
lcfrai-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
5 3600s alt1.aspmx.l.google.com 142.250.147.27
2404:6800:4000:1025::1b		 rd-in-f27.1e100.net
lcbomp-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
5 3600s alt2.aspmx.l.google.com 172.253.158.26
2404:6800:4003:c26::1a		 so-in-f26.1e100.net
so-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 3600s alt3.aspmx.l.google.com 108.177.125.26
2404:6800:4008:c01::1a		 tp-in-f26.1e100.net
tp-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 3600s alt4.aspmx.l.google.com 192.178.230.26
2404:6800:400b:c01b::1a		 yunrtab-in-f26.1e100.net
yunrtab-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscover104.21.54.126
🔶 Autoconfig188.114.96.1

🔷 AAAA Records (IPv6)#

2 records   73ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3033::ac43:8a8a 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —
2606:4700:3035::6815:367e 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —

🔐 HTTPS Records#

1 records   56ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.54.126,172.67.138.138 ech=AEX+DQBBwwAgACB0sUtEedfCu0o67EMIFJZgEknwVE6/Vpm5YrKuzVkNJwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:8a8a,2606:4700:3035::6815:367e

📝 TXT Records#

2 records   260ms
TXT Record
google-site-verification=4KsN3z4qfSeLt6hXVOGMESNz1IeTqY6LQFKPJdzpLas
v=spf1 include:_spf.google.com -all

✉️ SPF#

PolicyRecord (useful.dk)
-all (hard fail) v=spf1 include:_spf.google.com -all

📨 DMARC#

PolicyRecord (_dmarc.useful.dk)
p=none (monitor only) v=DMARC1; p=none; rua=mailto:85eb374f61cb4f5aa70c147c737481d3@dmarc-reports.cloudflare.net,mailto:dmarc@useful.dk

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-13 06:09:27
www104.21.54.126 172.67.138.138 2606:4700:3033::6815:367e 2606:4700:3034::ac43:8a8a (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardYes: any name under the zone resolves
CDS / CDNSKEYPublished: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found
SelectorCNAMEKey
google — 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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

183ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

0ms
FieldValue
Serial2407472950
Primary NS (MNAME)duke.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-07 01:44:53
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2003-04-23
Expires2027-04-30 (192d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
69ms
A
55ms
MX
73ms
AAAA
73ms
TXT
260ms
CAA
73ms
HTTPS
56ms
TLSA
237ms
SOA
0ms
MTA-STS
119ms
DNSSEC
183ms
SRV
171ms
Total
1446ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-07 01:29:34 6197ms 2 NS 2 A 5 MX 🔒 Secure
2026-10-02 19:28:00 626ms 2 NS 2 A 5 MX 🔒 Secure
2026-10-01 00:49:44 604ms 2 NS 2 A 5 MX 🔒 Secure
2026-09-25 05:22:46 1041ms 2 NS 2 A 5 MX 🔒 Secure
2026-09-04 13:23:47 1108ms 2 NS 2 A 5 MX 🔒 Secure
2026-08-26 16:05:03 2081ms 2 NS 2 A 5 MX 🔒 Secure
2026-08-21 19:50:47 1594ms 2 NS 2 A 5 MX 🔒 Secure
2026-08-09 16:32:10 2176ms 2 NS 2 A 5 MX 🔒 Secure
2026-07-15 08:20:37 9465ms 2 NS 2 A 5 MX 🔒 Secure
2026-06-25 16:42:59 2419ms 2 NS 2 A 5 MX 🔒 Secure
2026-06-21 04:13:03 shown 1446ms 2 NS 2 A 5 MX 🔒 Secure
2026-06-20 02:40:56 3380ms 2 NS 2 A 5 MX 🔒 Secure
2026-06-18 07:50:41 946ms 2 NS 2 A 5 MX 🔒 Secure
dhd.dk [/] search Domains, Hosts & DNS — .dk zone