`ctopen.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:80b1^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:229^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.2.41^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.128.177^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`cheryl.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a53^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cheryl.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c053^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`cheryl.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2053^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`cheryl.ns.cloudflare.com`
		A	108.162.192.83^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cheryl.ns.cloudflare.com`
		A	172.64.32.83^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cheryl.ns.cloudflare.com`
		A	173.245.58.83^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`cheryl.ns.cloudflare.com`
NS	`mark.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b82^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c182^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mark.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2182^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mark.ns.cloudflare.com`
		A	108.162.193.130^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	172.64.33.130^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
		A	173.245.59.130^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mark.ns.cloudflare.com`
TXT	`google-site-verification=lFVQEJ_UecEpEUM1plEytrmDm26S-rF4Kwrwss4cUOU`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.2.41, 172.67.128.177
		IPv6	2606:4700:3033::ac43:80b1, 2606:4700:3036::6815:229
SOA	`cheryl.ns.cloudflare.com`dns@cloudflare.com serial=2397206042

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1773551953

Same first word

ctopen.com

ctopen.org

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DNS History

10 records (6 active, 4 former)

●NScheryl.ns.cloudflare.com2026-02-24 → 2026-03-23 · 3 obs

○ 2017-03-23 11:18:46
● 2026-02-24 09:36:16
● 2026-03-23 01:47:44

●NSmark.ns.cloudflare.com2026-02-24 → 2026-03-23 · 3 obs

○ 2017-03-23 11:18:46
● 2026-02-24 09:36:16
● 2026-03-23 01:47:44

○NSns27.domaincontrol.com2015-06-24 → 2017-03-23 · 4 obs

● 2015-06-24 23:31:44
● 2017-03-23 11:18:46
○ 2026-02-24 09:36:16
○ 2026-03-23 01:47:44

○NSns28.domaincontrol.com2015-06-24 → 2017-03-23 · 4 obs

● 2015-06-24 23:31:44
● 2017-03-23 11:18:46
○ 2026-02-24 09:36:16
○ 2026-03-23 01:47:44

○MXctopen-org.mail.protection.outlook.com2015-06-24 → 2017-03-23 · 4 obs

● 2015-06-24 23:31:44
● 2017-03-23 11:18:46
○ 2026-02-24 09:36:16
○ 2026-03-23 01:47:44

●A104.21.2.412026-02-24 → 2026-03-23 · 3 obs

○ 2017-03-23 11:18:46
● 2026-02-24 09:36:16
● 2026-03-23 01:47:44

●A172.67.128.1772026-02-24 → 2026-03-23 · 3 obs

○ 2017-03-23 11:18:46
● 2026-02-24 09:36:16
● 2026-03-23 01:47:44

●A2606:4700:3033::ac43:80b12026-02-24 → 2026-03-23 · 3 obs

○ 2017-03-23 11:18:46
● 2026-02-24 09:36:16
● 2026-03-23 01:47:44

●A2606:4700:3036::6815:2292026-02-24 → 2026-03-23 · 3 obs

○ 2017-03-23 11:18:46
● 2026-02-24 09:36:16
● 2026-03-23 01:47:44

○A76.227.216.812015-06-24 → 2017-03-23 · 4 obs

● 2015-06-24 23:31:44
● 2017-03-23 11:18:46
○ 2026-02-24 09:36:16
○ 2026-03-23 01:47:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
ctopen.org	mark.ns.cloudflare.com, cheryl.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.130

NS records: mark.ns.cloudflare.com, cheryl.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ctopen.org (unsigned zone)

⏱️ Timing

Total: 351ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.128.177, 104.21.2.41`
AAAA	2	`2606:4700:3033::ac43:80b1, 2606:4700:3036::6815:229`
NS	2	`cheryl.ns.cloudflare.com, mark.ns.cloudflare.com`
TXT	1	`google-site-verification=lFVQEJ_UecEpEUM`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`cheryl.ns.cloudflare.com dns.cloudflare.`

Analysis

IP Addresses

ctopen.org resolves to four IPs: 2606:4700:3033::ac43:80b1, 2606:4700:3036::6815:229, 104.21.2.41 and 172.67.128.177.

Other host names, for instance www.spartamax-co.org, pgslot99.agency, aba77.org, questmedianetwork.co.uk and rainforestsymbols.com share IP numbers with ctopen.org.

Name Servers

ctopen.org has two name servers: cheryl.ns.cloudflare.com and mark.ns.cloudflare.com.

ctopen.org shares the same name server setup as other domains, for example criticalppp.com, statsaholic.com, startupsofpuertorico.com, xmms2.org and rdrsbangla.net.

ctopen.org shares some name servers with other domains, for example numantratech.com, 16banca.com, missionalcanadian.com, htmlsnap.com and draref.com.

These name servers are often used together with logan.ns.cloudflare.com, leah.ns.cloudflare.com and princess.ns.cloudflare.com.

Host names with six IP numbers: cheryl.ns.cloudflare.com points to: 2606:4700:50::adf5:3a53, 2803:f800:50::6ca2:c053, 2a06:98c1:50::ac40:2053, 108.162.192.83, 172.64.32.83 and 173.245.58.83; mark.ns.cloudflare.com points to: 2606:4700:58::adf5:3b82, 2803:f800:50::6ca2:c182, 2a06:98c1:50::ac40:2182, 108.162.193.130, 172.64.33.130 and 173.245.59.130.

ctopen.org - robtex.com

ctopen.org

org

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`ctopen.org`

`org`