`21online.app`

DNSSEC	⚠️ Not signed
A	216.150.1.1^{🇨🇦 Amazon216.150.1.0/24 EC2 Prefix}
NS	`priscilla.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26bd^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`priscilla.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2bd^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`priscilla.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22bd^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`priscilla.ns.cloudflare.com`
		A	108.162.194.189^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`priscilla.ns.cloudflare.com`
		A	162.159.38.189^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`priscilla.ns.cloudflare.com`
		A	172.64.34.189^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`priscilla.ns.cloudflare.com`
NS	`stanley.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c8d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c38d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`stanley.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:238d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`stanley.ns.cloudflare.com`
		A	108.162.195.141^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
		A	162.159.44.141^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
		A	172.64.35.141^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
MX	`route1.mx.cloudflare.net` ⭐
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
MX	`route2.mx.cloudflare.net`⁽⁵⁰⁾
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
MX	`route3.mx.cloudflare.net`⁽⁸²⁾
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
TXT	`_xe8xlme4fpzjuz0k6z04ujh058evxa6`
TXT	`_xlu9uxkhkuate2evfjel1aum4prrwni`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
SOA	`priscilla.ns.cloudflare.com`dns@cloudflare.com serial=2399589360

`app`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=101427

📈 Tranco rank: #755,475
🔒 HSTS Preload (+subdomains)

Same first word

21online.de

21online.com

21online.app

21online.ru

21online.co.za

21online.co

21online.net

21online.lat

21online.tw

21online.sk

21online.ca

Similar names

online12.ru

12online.nl

online12.de

12online.ru

online21.org

online21.com

online21.live

online12.com

online21.com.au

online21.de

12online.com

12online.com.cn

12online.de

DNS History

6 records (6 active, 0 former)

●NSpriscilla.ns.cloudflare.com2026-03-08 → 2026-03-25 · 2 obs

● 2026-03-08 18:02:32
● 2026-03-25 05:29:48

●NSstanley.ns.cloudflare.com2026-03-08 → 2026-03-25 · 2 obs

● 2026-03-08 18:02:32
● 2026-03-25 05:29:48

●MXroute1.mx.cloudflare.net2026-03-08 → 2026-03-25 · 2 obs

● 2026-03-08 18:02:32
● 2026-03-25 05:29:48

●MXroute2.mx.cloudflare.net2026-03-08 → 2026-03-25 · 2 obs

● 2026-03-08 18:02:32
● 2026-03-25 05:29:48

●MXroute3.mx.cloudflare.net2026-03-08 → 2026-03-25 · 2 obs

● 2026-03-08 18:02:32
● 2026-03-25 05:29:48

●A216.150.1.12026-03-08 → 2026-03-25 · 2 obs

● 2026-03-08 18:02:32
● 2026-03-25 05:29:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld3.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com...	10 records
21online.app	priscilla.ns.cloudflare.com, stanley.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.194.189

NS records: priscilla.ns.cloudflare.com, stanley.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21online.app (unsigned zone)

⏱️ Timing

Total: 415ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`216.150.1.1`
NS	2	`priscilla.ns.cloudflare.com, stanley.ns.cloudflare.com`
MX	3	`route1.mx.cloudflare.net (pri: 35), route2.mx.cloudflare.net (pri: 50)...`
TXT	3	`_xe8xlme4fpzjuz0k6z04ujh058evxa6, _xlu9uxkhkuate2evfjel1aum4prrwni...`
SOA	1	`priscilla.ns.cloudflare.com dns.cloudfla`

📌 Glue Records Collected

Total: 10

Out-of-bailiwick: 10 (ns-tld5.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...)

Analysis

IP Addresses

21online.app points to an IP address: 216.150.1.1.

other host names include email-247.com, 4p.si, talonarium.com, pronetgaming.com and tawabel.com; they share IP numbers with 21online.app.

Name Servers

Two name servers priscilla.ns.cloudflare.com and stanley.ns.cloudflare.com handle the delegation for 21online.app.

21online.app shares the same name server setup as other domains, for instance kantan.food, mysitec21.com, pedrini.com.br, vietnam.us.com and speak-english.od.ua.

21online.app at least partially shares name servers with other domains, for instance hadleighcastings.com, sqtoto.net, cloudsolutionsllc.com, hipermania.com.ar and undisputed.news.

These name servers are commonly used with vida.ns.cloudflare.com and kristin.ns.cloudflare.com.

Six IP addresses per host:

priscilla.ns.cloudflare.com points to 2606:4700:50::a29f:26bd, 2803:f800:50::6ca2:c2bd, 2a06:98c1:50::ac40:22bd, 108.162.194.189, 162.159.38.189 and 172.64.34.189; stanley.ns.cloudflare.com points to 2606:4700:58::a29f:2c8d, 2803:f800:50::6ca2:c38d, 2a06:98c1:50::ac40:238d, 108.162.195.141, 162.159.44.141 and 172.64.35.141

Mail Servers

Three mail servers handle 21online.app: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

21online.app shares at least partially some mail servers with other domains, for instance identifiertools.com, plejbona.cn, knserv.de, cvisb.org and e-cgo.net.

Host names with six IP numbers:

- route1.mx.cloudflare.net points to 2606:4700:f5::b, 2606:4700:f5::c, 2606:4700:f5::d, 162.159.205.11, 162.159.205.12 and 162.159.205.13

- route2.mx.cloudflare.net points to 2606:4700:f5::e, 2606:4700:f5::f, 2606:4700:f5::10, 162.159.205.17, 162.159.205.18 and 162.159.205.19

- route3.mx.cloudflare.net points to 2606:4700:f5::11, 2606:4700:f5::12, 2606:4700:f5::13, 162.159.205.23, 162.159.205.24 and 162.159.205.25

21online.app - robtex.com

21online.app

app

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`21online.app`

`app`