matematiktutor.dk

📜 Historical scan 2026-09-29 21:48:23 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

matematiktutor.dk is a .dk domain served by 2 nameservers (darl.ns.cloudflare.com, marge.ns.cloudflare.com). It was registered on 1 November 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 3.174.18.102 is hosted by Amazon.com, Inc. (AS16509) in United States. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 4 more. 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.

🖥️ Nameservers#

2 records 39ms

Nameserver	IP addresses	PTR	ASN / ISP
darl.ns.cloudflare.com	108.162.193.98 172.64.33.98 173.245.59.98 2606:4700:58::adf5:3b62 2803:f800:50::6ca2:c162 2a06:98c1:50::ac40:2162	darl.ns.cloudflare.com darl.ns.cloudflare.com darl.ns.cloudflare.com darl.ns.cloudflare.com darl.ns.cloudflare.com darl.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
marge.ns.cloudflare.com	108.162.192.191 172.64.32.191 173.245.58.191 2606:4700:50::adf5:3abf 2803:f800:50::6ca2:c0bf 2a06:98c1:50::ac40:20bf	marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

4 records 58ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
3.174.18.102	60s	server-3-174-18-102.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	3.128.0.0/10	🇺🇸 United States	—
3.174.18.40	60s	server-3-174-18-40.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	3.128.0.0/10	🇺🇸 United States	—
3.174.18.51	60s	server-3-174-18-51.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	3.128.0.0/10	🇺🇸 United States	—
3.174.18.54	60s	server-3-174-18-54.cph50.r.cloudfront.net	AS16509	Amazon.com, Inc.	3.128.0.0/10	🇺🇸 United States	—

📧 MX Records#

6 records 48ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	300s	aspmx.l.google.com	173.194.73.26 2a00:1450:4010:c0f::1a 2a00:1450:4010:c0f::1a	lq-in-f26.1e100.net lt-in-x1a.1e100.net lt-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	300s	alt1.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1a	lcdels-in-f26.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	300s	alt2.aspmx.l.google.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1a	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	300s	alt3.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1b	so-in-f27.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	300s	alt4.aspmx.l.google.com	108.177.125.26 2404:6800:4008:c01::1b	tp-in-f26.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
15	300s	hsm3zl62cucb4nhudauoorrwotkuymw3mw2447lcp4yhaiecmsma.mx-verification.google.com	—	—	—

🔷 AAAA Records (IPv6)#

8 records 51ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2600:9000:28e5:200:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:28e5:2200:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:28e5:2400:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:28e5:600:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:28e5:6200:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:28e5:b000:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:28e5:b200:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—
2600:9000:28e5:b800:c:b820:5a80:93a1	60s	—	AS16509	Amazon.com, Inc.	2600:9000:0:0:0:0:0:0/34	🇺🇸 United States	—

🔐 HTTPS Records#

1 records 47ms

Priority	Target	SvcParams
1 service	.	alpn="h2,h3"

📝 TXT Records#

6 records 162ms

TXT Record
brevo-code:8209d08e6810bcdd8b7e920e16ca58c2
facebook-domain-verification=e0357bwlk25haarff0gonqnhqbhozq
google-site-verification=EFeQ2sZf7RmNY4_2qjgE7sebFRem4scPJoEKyE36pxk
google-site-verification=jl8DQi9677QSXe2a0Ib_plZx7FDaym7LT4Fqa_qYs-E
klaviyo-site-verification=WAWMAD
v=spf1 include:_spf.google.com include:spf.brevo.com ~all

✉️ SPF#

Policy	Record (matematiktutor.dk)
~all (soft fail)	v=spf1 include:_spf.google.com include:spf.brevo.com ~all

📨 DMARC#

Policy	Record (_dmarc.matematiktutor.dk)
p=none (monitor only)	v=DMARC1; p=none

📬 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 2026-10-11 19:51:51

www CNAME	d2tki8ada3w60a.cloudfront.net (all on cloudfront.net) → 3.174.18.102 3.174.18.40 3.174.18.51 3.174.18.54 2600:9000:28e5:0:c:b820:5a80:93a1 2600:9000:28e5:1000:c:b820:5a80:93a1 2600:9000:28e5:2800:c:b820:5a80:93a1 2600:9000:28e5:4200:c:b820:5a80:93a1 (AS16509)
www vs bare domain	Same network matematiktutor.dk: 3.174.18.102 3.174.18.40 3.174.18.51 3.174.18.54 (AS16509) www.matematiktutor.dk: 3.174.18.102 3.174.18.40 3.174.18.51 3.174.18.54 (AS16509)
Wildcard	No

✍️ DKIM keys#

4 found

Selector	CNAME	Key
google	—	RSA · ~2048 bit
mail	—	RSA · ~1024 bit below 2048 bit
s1	s1.domainkey.u114146208.wl209.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u114146208.wl209.sendgrid.net	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: 2/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

143ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

38ms

Field	Value
Serial	2416174101
Primary NS (MNAME)	darl.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-11 20:27:14

Field	Value
Registrar	Simply.com A/S
Registered	2019-11-01
Expires	2026-11-30 (42d)

🔗 Same registrant#

1 domain

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).

Domain	Registrar
granthero.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

39ms

58ms

48ms

AAAA

51ms

TXT

162ms

CAA

32ms

HTTPS

47ms

TLSA

219ms

SOA

38ms

MTA-STS

56ms

DNSSEC

143ms

SRV

58ms

Total

1413ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-11 19:51:51	730ms	2 NS 4 A 6 MX	🔓 Insecure
2026-09-29 21:48:23 shown	1413ms	2 NS 4 A 6 MX	🔓 Insecure
2026-09-26 21:15:33	992ms	2 NS 4 A 6 MX	🔓 Insecure
2026-09-25 20:40:14	1316ms	2 NS 4 A 6 MX	🔓 Insecure
2026-09-24 20:15:27	4026ms	2 NS 4 A 6 MX	🔓 Insecure
2026-09-21 03:34:05	1525ms	2 NS 4 A 6 MX	🔓 Insecure
2026-09-19 00:22:36	1667ms	2 NS 4 A 6 MX	🔓 Insecure
2026-09-06 17:07:40	2782ms	2 NS 4 A 6 MX	🔓 Insecure
2026-08-25 23:19:20	9924ms	2 NS 4 A 6 MX	🔓 Insecure
2026-08-13 17:14:23	11486ms	2 NS 4 A 6 MX	🔓 Insecure
2026-07-27 08:37:56	1543ms	2 NS 4 A 6 MX	🔓 Insecure
2026-07-18 08:06:25	3870ms	2 NS 4 A 6 MX	🔓 Insecure
2026-06-17 12:12:30	5229ms	2 NS 4 A 6 MX	🔓 Insecure