`kalkulation.info`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:b536^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:2849^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.40.73^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.181.54^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`gwen.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3aa0^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gwen.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0a0^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`gwen.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20a0^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`gwen.ns.cloudflare.com`
		A	108.162.192.160^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gwen.ns.cloudflare.com`
		A	172.64.32.160^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gwen.ns.cloudflare.com`
		A	173.245.58.160^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gwen.ns.cloudflare.com`
NS	`sterling.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c8f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sterling.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c38f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`sterling.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:238f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`sterling.ns.cloudflare.com`
		A	108.162.195.143^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sterling.ns.cloudflare.com`
		A	162.159.44.143^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sterling.ns.cloudflare.com`
		A	172.64.35.143^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`sterling.ns.cloudflare.com`
MX	`_dc-mx.ef7ac3c0f38d.kalkulation.info` ⭐
		A	157.250.197.43^{🇯🇵 NJIIX-1157.250.192.0/20}
			PTR	`vda8500b.trouble-free.net`
TXT	`v=spf1 a mx ip4:157.250.197.42 include:relay.mailbaby.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.40.73, 172.67.181.54
		IPv6 hints	2606:4700:3031::ac43:b536, 2606:4700:3034::6815:2849
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=187, name=cloudflare-ech.com
SOA	`gwen.ns.cloudflare.com`dns@cloudflare.com serial=2409766754

`info`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.info.afilias-nst.info` ⭐
	NS	`a2.info.afilias-nst.info`
	NS	`b0.info.afilias-nst.org` ⚠️ Not in parent delegation
	NS	`b2.info.afilias-nst.org` ⚠️ Not in parent delegation
	NS	`c0.info.afilias-nst.info`
	NS	`d0.info.afilias-nst.org` ⚠️ Not in parent delegation
	SOA	`a0.info.afilias-nst.info`hostmaster@donuts.email serial=1786141503

⚠️ On DNS blocklist: tif

Subdomains

www.kalkulation.info

Same first word

kalkulation.info

DNS History

20 records (7 active, 13 former)

●NSgwen.ns.cloudflare.com2026-05-23 → 2026-08-07 · 3 obs

○ 2026-05-07 13:19:20
● 2026-05-23 02:02:14
● 2026-08-07 22:56:18

○NSns1.ns-serve.net2015-06-18 → 2017-06-28 · 4 obs

● 2015-06-18 04:31:38
● 2017-06-28 16:44:18
○ 2026-05-07 13:19:20
○ 2026-08-07 22:56:18

○NSns2.ns-serve.net2015-06-18 → 2017-06-28 · 4 obs

● 2015-06-18 04:31:38
● 2017-06-28 16:44:18
○ 2026-05-07 13:19:20
○ 2026-08-07 22:56:18

●NSsterling.ns.cloudflare.com2026-05-23 → 2026-08-07 · 3 obs

○ 2026-05-07 13:19:20
● 2026-05-23 02:02:14
● 2026-08-07 22:56:18

○NSvda5900a.trouble-free.net2026-05-07 → 2026-05-07 · 4 obs

○ 2017-06-28 16:44:18
● 2026-05-07 13:19:20
○ 2026-05-23 02:02:14
○ 2026-08-07 22:56:18

○NSvda5900b.trouble-free.net2026-05-07 → 2026-05-07 · 4 obs

○ 2017-06-28 16:44:18
● 2026-05-07 13:19:20
○ 2026-05-23 02:02:14
○ 2026-08-07 22:56:18

●MX_dc-mx.ef7ac3c0f38d.kalkulation.info2026-05-23 → 2026-08-07 · 3 obs

○ 2026-05-07 13:19:20
● 2026-05-23 02:02:14
● 2026-08-07 22:56:18

○MXmail.kalkulation.info2015-06-18 → 2026-05-07 · 4 obs

● 2015-06-18 04:31:38
● 2026-05-07 13:19:20
○ 2026-05-23 02:02:14
○ 2026-08-07 22:56:18

●A104.21.40.732026-05-23 → 2026-08-07 · 6 obs

○ 2026-05-07 13:19:20
● 2026-05-23 02:02:14
● 2026-06-13 21:49:54
○ 2026-06-17 17:49:40
● 2026-07-03 11:16:30
● 2026-08-07 22:56:18

○A127.0.0.12015-06-18 → 2017-06-28 · 4 obs

● 2015-06-18 04:31:38
● 2017-06-28 16:44:18
○ 2026-05-07 13:19:20
○ 2026-08-07 22:56:18

●A172.67.181.542026-05-23 → 2026-08-07 · 6 obs

○ 2026-05-07 13:19:20
● 2026-05-23 02:02:14
● 2026-06-13 21:49:54
○ 2026-06-17 17:49:40
● 2026-07-03 11:16:30
● 2026-08-07 22:56:18

○A188.114.96.02026-06-17 → 2026-06-17 · 4 obs

○ 2026-06-13 21:49:54
● 2026-06-17 17:49:40
○ 2026-07-03 11:16:30
○ 2026-08-07 22:56:18

○A188.114.97.02026-06-17 → 2026-06-17 · 4 obs

○ 2026-06-13 21:49:54
● 2026-06-17 17:49:40
○ 2026-07-03 11:16:30
○ 2026-08-07 22:56:18

●A2606:4700:3031::ac43:b5362026-07-03 → 2026-08-07 · 3 obs

○ 2026-06-17 17:49:40
● 2026-07-03 11:16:30
● 2026-08-07 22:56:18

○A2606:4700:3032::ac43:b5362026-05-23 → 2026-06-13 · 5 obs

○ 2026-05-07 13:19:20
● 2026-05-23 02:02:14
● 2026-06-13 21:49:54
○ 2026-06-17 17:49:40
○ 2026-08-07 22:56:18

●A2606:4700:3034::6815:28492026-07-03 → 2026-08-07 · 3 obs

○ 2026-06-17 17:49:40
● 2026-07-03 11:16:30
● 2026-08-07 22:56:18

○A2606:4700:3037::6815:28492026-05-23 → 2026-06-13 · 5 obs

○ 2026-05-07 13:19:20
● 2026-05-23 02:02:14
● 2026-06-13 21:49:54
○ 2026-06-17 17:49:40
○ 2026-08-07 22:56:18

○A2a06:98c1:3120::2026-06-17 → 2026-06-17 · 4 obs

○ 2026-06-13 21:49:54
● 2026-06-17 17:49:40
○ 2026-07-03 11:16:30
○ 2026-08-07 22:56:18

○A2a06:98c1:3121::2026-06-17 → 2026-06-17 · 4 obs

○ 2026-06-13 21:49:54
● 2026-06-17 17:49:40
○ 2026-07-03 11:16:30
○ 2026-08-07 22:56:18

○A66.45.230.822026-05-07 → 2026-05-07 · 4 obs

○ 2017-06-28 16:44:18
● 2026-05-07 13:19:20
○ 2026-05-23 02:02:14
○ 2026-08-07 22:56:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
info	a0.info.afilias-nst.info, a2.info.afilias-nst.info, c0.info.afilias-nst.info	-
kalkulation.info	sterling.ns.cloudflare.com, gwen.ns.cloudflare.com	-

✅ Authoritative Response

Server:162.159.44.143

NS records: sterling.ns.cloudflare.com, gwen.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kalkulation.info (unsigned zone)

⏱️ Timing

Total: 647ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.40.73, 172.67.181.54`
AAAA	2	`2606:4700:3034::6815:2849, 2606:4700:3031::ac43:b536`
NS	2	`gwen.ns.cloudflare.com, sterling.ns.cloudflare.com`
MX	1	`_dc-mx.ef7ac3c0f38d.kalkulation.info (pr`
TXT	1	`v=spf1 a mx ip4:157.250.197.42 include:r`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`gwen.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

kalkulation.info is a parent domain of www.kalkulation.info.

IP Addresses

kalkulation.info resolves to four IP addresses: 104.21.40.73, 172.67.181.54, 2606:4700:3031::ac43:b536 and 2606:4700:3034::6815:2849.

Among the host names that share IP numbers with kalkulation.info are bildung24.net, feliciamooreformayor.com, eyc.pl and two others.

Name Servers

kalkulation.info is delegated to two name servers: gwen.ns.cloudflare.com and sterling.ns.cloudflare.com.

kalkulation.info has the same name server delegation as a number of other domains, such as baukalkulation.info, bwis.io, deliverydosuezeexpress.sbs and two more.

kalkulation.info shares at least some of its name servers with other domains, including mypk.info, blocles4u.com, kidscooperate.com and two others.

These name servers are frequently paired with the name servers theo.ns.cloudflare.com, kim.ns.cloudflare.com and candy.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

gwen.ns.cloudflare.com resolves to 108.162.192.160, 172.64.32.160, 173.245.58.160 and 3 other IP addresses.

sterling.ns.cloudflare.com resolves to 108.162.195.143, 162.159.44.143, 172.64.35.143 and 3 other IP addresses.

Mail Servers

kalkulation.info routes its mail through a single mail server, _dc-mx.ef7ac3c0f38d.kalkulation.info.

_dc-mx.ef7ac3c0f38d.kalkulation.info resolves to a single IP number: 157.250.197.43.

kalkulation.info - robtex.com