`calvin.co`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:2efb^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:a98d^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.46.251^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.169.141^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`andy.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b65^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c165^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`andy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2165^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`andy.ns.cloudflare.com`
		A	108.162.193.101^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andy.ns.cloudflare.com`
		A	172.64.33.101^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andy.ns.cloudflare.com`
		A	173.245.59.101^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`andy.ns.cloudflare.com`
NS	`dana.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a69^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dana.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c069^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`dana.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2069^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`dana.ns.cloudflare.com`
		A	108.162.192.105^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dana.ns.cloudflare.com`
		A	172.64.32.105^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dana.ns.cloudflare.com`
		A	173.245.58.105^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`dana.ns.cloudflare.com`
TXT	`e8c4ab6a2bec3b9a31996e269d0d8537a09318a1`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.46.251, 172.67.169.141
		IPv6 hints	2606:4700:3031::6815:2efb, 2606:4700:3033::ac43:a98d
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=180, name=cloudflare-ech.com
SOA	`andy.ns.cloudflare.com`dns@cloudflare.com serial=2408666427

`co`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.registrydns.co`
	NS	`b.registrydns.co`
	NS	`c.registrydns.co`
	NS	`d.registrydns.co`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1759706815

Same first word

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incval.com

vilcan.eu

vancil.com

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clavin.de

nivlac.net

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clavin.org

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vlainc.ca

clanvi.ru

DNS History

15 records (6 active, 9 former)

●NSandy.ns.cloudflare.com2026-07-14 → 2026-07-16 · 3 obs

○ 2018-07-27 04:20:38
● 2026-07-14 08:47:00
● 2026-07-16 01:34:16

●NSdana.ns.cloudflare.com2026-07-14 → 2026-07-16 · 3 obs

○ 2018-07-27 04:20:38
● 2026-07-14 08:47:00
● 2026-07-16 01:34:16

○NSns1.fastpark.net2015-05-19 → 2015-05-19 · 3 obs

● 2015-05-19 14:42:06
○ 2015-10-20 08:53:18
○ 2026-07-16 01:34:16

○NSns1.parkingcrew.net2015-10-20 → 2018-07-27 · 5 obs

○ 2015-05-19 14:42:06
● 2015-10-20 08:53:18
● 2018-07-27 04:20:38
○ 2026-07-14 08:47:00
○ 2026-07-16 01:34:16

○NSns2.fastpark.net2015-05-19 → 2015-05-19 · 3 obs

● 2015-05-19 14:42:06
○ 2015-10-20 08:53:18
○ 2026-07-16 01:34:16

○NSns2.parkingcrew.net2015-10-20 → 2018-07-27 · 5 obs

○ 2015-05-19 14:42:06
● 2015-10-20 08:53:18
● 2018-07-27 04:20:38
○ 2026-07-14 08:47:00
○ 2026-07-16 01:34:16

○MXmail.h-email.net2015-10-20 → 2018-07-27 · 4 obs

● 2015-10-20 08:53:18
● 2018-07-27 04:20:38
○ 2026-07-14 08:47:00
○ 2026-07-16 01:34:16

●A104.21.46.2512026-07-14 → 2026-07-16 · 3 obs

○ 2018-07-27 04:20:38
● 2026-07-14 08:47:00
● 2026-07-16 01:34:16

●A172.67.169.1412026-07-14 → 2026-07-16 · 3 obs

○ 2018-07-27 04:20:38
● 2026-07-14 08:47:00
● 2026-07-16 01:34:16

○A185.53.177.62015-10-20 → 2015-10-20 · 4 obs

○ 2015-05-19 14:42:06
● 2015-10-20 08:53:18
○ 2015-12-19 01:29:42
○ 2026-07-16 01:34:16

○A185.53.179.72018-07-27 → 2018-07-27 · 4 obs

○ 2017-01-26 13:36:12
● 2018-07-27 04:20:38
○ 2026-07-14 08:47:00
○ 2026-07-16 01:34:16

○A216.8.179.252015-05-19 → 2015-05-19 · 3 obs

● 2015-05-19 14:42:06
○ 2015-10-20 08:53:18
○ 2026-07-16 01:34:16

●A2606:4700:3031::6815:2efb2026-07-14 → 2026-07-16 · 3 obs

○ 2018-07-27 04:20:38
● 2026-07-14 08:47:00
● 2026-07-16 01:34:16

●A2606:4700:3033::ac43:a98d2026-07-14 → 2026-07-16 · 3 obs

○ 2018-07-27 04:20:38
● 2026-07-14 08:47:00
● 2026-07-16 01:34:16

○A54.72.9.512015-12-19 → 2017-01-26 · 5 obs

○ 2015-10-20 08:53:18
● 2015-12-19 01:29:42
● 2017-01-26 13:36:12
○ 2018-07-27 04:20:38
○ 2026-07-16 01:34:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
co	a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co	-
calvin.co	andy.ns.cloudflare.com, dana.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.58.105

NS records: andy.ns.cloudflare.com, dana.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for calvin.co (unsigned zone)

⏱️ Timing

Total: 456ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.46.251, 172.67.169.141`
AAAA	2	`2606:4700:3031::6815:2efb, 2606:4700:3033::ac43:a98d`
NS	2	`andy.ns.cloudflare.com, dana.ns.cloudflare.com`
TXT	1	`e8c4ab6a2bec3b9a31996e269d0d8537a09318a1`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`andy.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

calvin.co has four IP addresses: 104.21.46.251, 172.67.169.141, 2606:4700:3031::6815:2efb and 2606:4700:3033::ac43:a98d.

Two other host names, along with www.oette.info, www.impactcollege.net and 7911zz.com, also share IP numbers with calvin.co.

Name Servers

calvin.co is served by two delegated name servers, andy.ns.cloudflare.com and dana.ns.cloudflare.com.

calvin.co shares its NS records with other domains, for example affordablecharms.com, amantikirnatural.com.br, graydonschwartz.com and two others.

calvin.co shares at least some of its name servers with other domains, including millicentgolfclub.com.au, seirup.com, xn--wiatgier-lvb.net.pl and two others.

These name servers are frequently paired with the name servers dave.ns.cloudflare.com and zariyah.ns.cloudflare.com.

DNS names with 6 IP addresses:

andy.ns.cloudflare.com carries IP addresses 108.162.193.101, 172.64.33.101 and 173.245.59.101, with 3 other addresses beyond those.

dana.ns.cloudflare.com carries IP addresses 108.162.192.105, 172.64.32.105 and 173.245.58.105, with 3 other addresses beyond those.

calvin.co - robtex.com

calvin.co

co

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`calvin.co`

`co`