tac.dk

📜 Historical scan 2026-09-21 22:50:12 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

tac.dk is a .dk domain served by 2 nameservers (hattie.ns.cloudflare.com, henrik.ns.cloudflare.com). It was registered on 16 June 1994 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.52.46 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx4.spamfri.dk, mx2.spamfri.dk and 2 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 45ms

Nameserver	IP addresses	PTR	ASN / ISP
hattie.ns.cloudflare.com	108.162.194.172 162.159.38.172 172.64.34.172 2606:4700:50::a29f:26ac 2803:f800:50::6ca2:c2ac 2a06:98c1:50::ac40:22ac	hattie.ns.cloudflare.com hattie.ns.cloudflare.com hattie.ns.cloudflare.com hattie.ns.cloudflare.com hattie.ns.cloudflare.com hattie.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
henrik.ns.cloudflare.com	108.162.195.105 162.159.44.105 172.64.35.105 2606:4700:58::a29f:2c69 2803:f800:50::6ca2:c369 2a06:98c1:50::ac40:2369	henrik.ns.cloudflare.com henrik.ns.cloudflare.com henrik.ns.cloudflare.com henrik.ns.cloudflare.com henrik.ns.cloudflare.com henrik.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 33ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.52.46	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.195.96	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

4 records 35ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx4.spamfri.dk	193.200.91.108 2001:67c:564:fffd::4001	mx4.spamfri.dk mx4.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
20	300s	mx2.spamfri.dk	193.200.91.109 2001:67c:564:fffd::2001	mx2.spamfri.dk mx2.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
30	300s	mx3.spamfri.dk	2a00:1b18:2:3:fe::2 62.69.152.43 62.69.152.43	mx3.spamfri.dk 43.34-46.152.69.62.in-addr.arpa mx3.spamfri.dk	AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S
40	300s	mx1.spamfri.dk	195.242.131.16 2001:67c:564:fffd::1001	mx1.spamfri.dk mx1.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS

🔷 AAAA Records (IPv6)#

2 records 42ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::ac43:c360	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:342e	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 32ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.52.46,172.67.195.96 ech=AEX+DQBBNwAgACAnYuMw50wmmi0IzRZCGBMXXCAV+Er4a9sR/BueMIpAZAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::ac43:c360,2606:4700:3037::6815:342e

📝 TXT Records#

2 records 193ms

TXT Record
google-site-verification=ck2yZAygrO1rFvZ4ZvhUIyMphJ1fQade7YU8Uva2KMw
v=spf1 ip4:193.200.90.178 include:_spf.e-studio.dk +a +mx ~all

✉️ SPF#

Policy	Record (tac.dk)
~all (soft fail)	v=spf1 ip4:193.200.90.178 include:_spf.e-studio.dk +a +mx ~all

📨 DMARC#

Policy	Record (_dmarc.tac.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 2026-10-14 05:53:41

www	Exists, no address
www vs bare domain	www does not resolve tac.dk: 104.21.52.46 172.67.195.96 2a06:98c1:3120::1 2a06:98c1:3121::1 (AS13335) www.tac.dk: no address (all like this)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	RSA Invalid key data — receivers can't verify signatures

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: 3/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

4 records 69ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1.spamfri.dk	DANE-EE · SPKI · SHA-256	884451547A03D0AC2F628D943839BAA6…
SMTP _25._tcp.mx2.spamfri.dk	DANE-EE · SPKI · SHA-256	6598C93F79B95376BB8099E9AC862167…
SMTP _25._tcp.mx3.spamfri.dk	DANE-EE · SPKI · SHA-256	BBFB0694919290E5BC9D6E2C6F47D846…
SMTP _25._tcp.mx4.spamfri.dk	DANE-EE · SPKI · SHA-256	4EE743A99328AEF5142706CA5FD3AD61…

🔐 DNSSEC#

119ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2415473223
Primary NS (MNAME)	hattie.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-14 06:18:27

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1994-06-16
Expires	2028-06-30 (620d)

🔗 Same registrant#

13 domains

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
bacula.dk	Punktum dk A/S (direct)
biger.dk	Punktum dk A/S (direct)
blueserver.dk	Punktum dk A/S (direct)
blueservice.dk	Punktum dk A/S (direct)
boeslunde.dk	Punktum dk A/S (direct)
kuvertdanmark.dk	Punktum dk A/S (direct)
kviktryk.dk	Punktum dk A/S (direct)
navnskilt.dk	Punktum dk A/S (direct)
plakat-tryk.dk	Punktum dk A/S (direct)
plakattryk.dk	Punktum dk A/S (direct)
prepress.dk	Punktum dk A/S (direct)
skiltselv.dk	Punktum dk A/S (direct)
visco.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

45ms

33ms

35ms

AAAA

42ms

TXT

193ms

CAA

30ms

HTTPS

32ms

TLSA

69ms

SOA

0ms

MTA-STS

74ms

DNSSEC

119ms

SRV

86ms

Total

928ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-14 05:53:41	572ms	2 NS 2 A 4 MX	🔒 Secure
2026-10-08 11:52:53	3154ms	2 NS 2 A 4 MX	🔒 Secure
2026-10-03 08:13:42	665ms	2 NS 2 A 4 MX	🔒 Secure
2026-09-28 14:59:44	948ms	2 NS 2 A 4 MX	🔒 Secure
2026-09-27 14:50:50	828ms	2 NS 2 A 4 MX	🔒 Secure
2026-09-21 22:50:12 shown	928ms	2 NS 2 A 4 MX	🔒 Secure
2026-09-07 22:35:59	1428ms	2 NS 2 A 4 MX	🔒 Secure
2026-08-20 11:54:16	974ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-17 05:40:30	3128ms	2 NS 1 A 0 MX	🔒 Secure
2026-08-11 05:09:45	2135ms	2 NS 1 A 0 MX	🔒 Secure
2026-08-07 21:23:15	1173ms	2 NS 1 A 0 MX	🔒 Secure
2026-07-29 07:50:53	1594ms	2 NS 1 A 0 MX	🔒 Secure
2026-07-23 23:51:05	1745ms	2 NS 1 A 0 MX	🔒 Secure
2026-07-17 22:55:49	1059ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-30 02:30:28	1014ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-25 16:27:22	990ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-20 16:51:44	782ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-19 17:53:37	514ms	2 NS 1 A 0 MX	🔒 Secure
2026-06-17 17:43:41	717ms	2 NS 1 A 0 MX	🔒 Secure