authentication.dk - dns.ninja

`authentication.dk`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:28d5^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:bc62^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.40.213^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.188.98^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`lina.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3abb^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lina.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0bb^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lina.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20bb^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lina.ns.cloudflare.com`
		A	108.162.192.187^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lina.ns.cloudflare.com`
		A	172.64.32.187^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lina.ns.cloudflare.com`
		A	173.245.58.187^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lina.ns.cloudflare.com`
NS	`piotr.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bde^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piotr.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1de^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`piotr.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21de^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`piotr.ns.cloudflare.com`
		A	108.162.193.222^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piotr.ns.cloudflare.com`
		A	172.64.33.222^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piotr.ns.cloudflare.com`
		A	173.245.59.222^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`piotr.ns.cloudflare.com`
MX	`mx.simply.com` ⭐
		A	94.231.106.20^{🇩🇰 team-blue-denmark94.231.96.0/20 ZITCOM A/S}
			PTR	`mx.simply.com`
TXT	`google-site-verification=YhVrea0X2rKZvA-Jh90aLtkVkbNnUPVHIBiBsyeQj5k`
TXT	`stripe-verification=3db858e12183a3e19c9876e3a060c420c2482a59eeaa62dd4872d607b...`
TXT	`v=spf1 include:spf.simply.com -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.40.213, 172.67.188.98
		IPv6 hints	2606:4700:3031::6815:28d5, 2606:4700:3037::ac43:bc62
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=208, name=cloudflare-ech.com
SOA	`lina.ns.cloudflare.com`dns@cloudflare.com serial=2408133130

`dk`

	DNSSEC	🔒 Signed (DS record present)
	NS	`b.nic.dk` ⭐
	NS	`c.nic.dk`
	NS	`h.nic.dk`
	NS	`l.nic.dk`
	NS	`s.nic.dk`
	NS	`t.nic.dk`
	TXT	`DK zone updateEpoch 1782852661localtime Tue Jun 30 22:51:01 2026gmtime Tue Ju...`
	SOA	`b.nic.dk`tech@punktum.dk serial=1782852661

Same first word

Similar names

authnetication.herokuapp.com

DNS History

11 records (7 active, 4 former)

●NSlina.ns.cloudflare.com2026-02-18 → 2026-06-30 · 2 obs

● 2026-02-18 05:35:22
● 2026-06-30 20:55:52

●NSpiotr.ns.cloudflare.com2026-02-18 → 2026-06-30 · 2 obs

● 2026-02-18 05:35:22
● 2026-06-30 20:55:52

●MXmx.simply.com2026-02-18 → 2026-06-30 · 2 obs

● 2026-02-18 05:35:22
● 2026-06-30 20:55:52

●A104.21.40.2132026-02-18 → 2026-06-30 · 11 obs

● 2026-02-18 05:35:22
● 2026-03-15 15:41:38
○ 2026-03-16 10:28:58
● 2026-04-04 18:59:42
● 2026-04-30 07:15:52
○ 2026-05-05 09:39:58
● 2026-05-14 02:00:46
● 2026-06-06 04:39:24
○ 2026-06-24 06:25:20
● 2026-06-30 20:55:50
● 2026-06-30 20:55:52

●A172.67.188.982026-02-18 → 2026-06-30 · 11 obs

○A188.114.96.02026-03-16 → 2026-06-24 · 10 obs

○ 2026-03-15 15:41:38
● 2026-03-16 10:28:58
○ 2026-04-04 18:59:42
○ 2026-04-30 07:15:52
● 2026-05-05 09:39:58
○ 2026-05-14 02:00:46
○ 2026-06-06 04:39:24
● 2026-06-24 06:25:20
○ 2026-06-30 20:55:50
○ 2026-06-30 20:55:52

○A188.114.97.02026-03-16 → 2026-06-24 · 10 obs

●A2606:4700:3031::6815:28d52026-02-18 → 2026-06-30 · 11 obs

●A2606:4700:3037::ac43:bc622026-02-18 → 2026-06-30 · 11 obs

○A2a06:98c1:3120::2026-03-16 → 2026-06-24 · 10 obs

○A2a06:98c1:3121::2026-03-16 → 2026-06-24 · 10 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dk	c.nic.dk, b.nic.dk, t.nic.dk, s.nic.dk...	-
authentication.dk	piotr.ns.cloudflare.com, lina.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.187

NS records: piotr.ns.cloudflare.com, lina.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for authentication.dk (unsigned zone)

⏱️ Timing

Total: 262ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.40.213, 172.67.188.98`
AAAA	2	`2606:4700:3031::6815:28d5, 2606:4700:3037::ac43:bc62`
NS	2	`lina.ns.cloudflare.com, piotr.ns.cloudflare.com`
MX	1	`mx.simply.com (pri: 10)`
TXT	3	`google-site-verification=YhVrea0X2rKZvA-, stripe-verification=3db858e12183a3e19c98...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`lina.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

authentication.dk points to the four IP addresses 104.21.40.213, 172.67.188.98, 2606:4700:3031::6815:28d5 and 2606:4700:3037::ac43:bc62.

nh88.global, www.g-rat.net, wellspringacademy.org and two other host names share IP numbers with authentication.dk.

Name Servers

authentication.dk is served by two delegated name servers, lina.ns.cloudflare.com and piotr.ns.cloudflare.com.

authentication.dk uses the same name servers as several other domains — among them fixyourdirtbike.com, johnniecalloway.com, pablodelvalle.com and two more.

The name servers of authentication.dk overlap at least partially with those of other domains — among them zhongding.cc, sapiloncat.com, gunwerks.com and two more.

These name servers commonly appear alongside the name servers betty.ns.cloudflare.com and simon.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

lina.ns.cloudflare.com carries IP addresses 108.162.192.187, 172.64.32.187 and 173.245.58.187, with 3 other addresses beyond those.

piotr.ns.cloudflare.com carries IP addresses 108.162.193.222, 172.64.33.222 and 173.245.59.222, with 3 other addresses beyond those.

Mail Servers

Mail for authentication.dk is handled by a single mail server, mx.simply.com.

authentication.dk uses an identical mail server configuration to several other domains — among them bohaka.se, randlovboesen.dk, virumdyreklinik.dk and two more.

There is one IP number for mx.simply.com: 94.231.106.20.