`focusfour.app`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:d649^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:3596^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.53.150^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.214.73^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`chuck.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b56^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chuck.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c156^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`chuck.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2156^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`chuck.ns.cloudflare.com`
		A	108.162.193.86^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chuck.ns.cloudflare.com`
		A	172.64.33.86^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chuck.ns.cloudflare.com`
		A	173.245.59.86^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`chuck.ns.cloudflare.com`
NS	`tessa.ns.cloudflare.com`
		A	2606:4700:50::a29f:26e5^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2e5^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tessa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22e5^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tessa.ns.cloudflare.com`
		A	108.162.194.229^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.ns.cloudflare.com`
		A	162.159.38.229^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.ns.cloudflare.com`
		A	172.64.34.229^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.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	`route3.mx.cloudflare.net`⁽⁶²⁾
		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`
MX	`route2.mx.cloudflare.net`⁽⁷²⁾
		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`
TXT	`google-site-verification=MRhTZ-tp4PHOVo3Shrzj6gfxvU-k_SDN1i-HBAjhnlM`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.53.150, 172.67.214.73
		IPv6 hints	2606:4700:3033::ac43:d649, 2606:4700:3036::6815:3596
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=210, name=cloudflare-ech.com
SOA	`chuck.ns.cloudflare.com`dns@cloudflare.com serial=2400781446

`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

🔒 HSTS Preload (+subdomains)

Same first word

focusfour.app

focusfour.com

focusfour.pro

DNS History

9 records (9 active, 0 former)

●NSchuck.ns.cloudflare.com2026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●NStessa.ns.cloudflare.com2026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●MXroute1.mx.cloudflare.net2026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●MXroute2.mx.cloudflare.net2026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●MXroute3.mx.cloudflare.net2026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●A104.21.53.1502026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●A172.67.214.732026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●A2606:4700:3033::ac43:d6492026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

●A2606:4700:3036::6815:35962026-05-03 → 2026-05-12 · 2 obs

● 2026-05-03 10:12:28
● 2026-05-12 23:38:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
focusfour.app	tessa.ns.cloudflare.com, chuck.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.229

NS records: tessa.ns.cloudflare.com, chuck.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for focusfour.app (unsigned zone)

⏱️ Timing

Total: 619ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.53.150, 172.67.214.73`
AAAA	2	`2606:4700:3033::ac43:d649, 2606:4700:3036::6815:3596`
NS	2	`chuck.ns.cloudflare.com, tessa.ns.cloudflare.com`
MX	3	`route1.mx.cloudflare.net (pri: 18), route3.mx.cloudflare.net (pri: 62)...`
TXT	2	`google-site-verification=MRhTZ-tp4PHOVo3, v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`chuck.ns.cloudflare.com dns.cloudflare.c`

Analysis

IP Addresses

focusfour.app points to four IP numbers: 2606:4700:3033::ac43:d649, 2606:4700:3036::6815:3596, 104.21.53.150 and 172.67.214.73.

Other host names, for instance www.creyon-nurie.com, cyberpulse-dynamics.forum, urbancuratedliving.com, pilihkartu.com and www.wtm.at share IP numbers with focusfour.app.

Name Servers

Delegation for focusfour.app rests with two name servers, chuck.ns.cloudflare.com and tessa.ns.cloudflare.com.

focusfour.app shares the same name server setup as other domains, including seoulvisa.com, canterburyroyalegourmet.com, cornuwel.net, print-games.com and cometoclifton.com.

focusfour.app at least partially shares name servers with other domains, for instance wellnessdove.com, samsangtong.com, ad-account-admin-desk-bdm.pages.dev, wealthorchestrated.com and mobasin.com.

These name servers are commonly used with the name servers elmo.ns.cloudflare.com.

Host names with six IP numbers: chuck.ns.cloudflare.com points to: 2606:4700:58::adf5:3b56, 2803:f800:50::6ca2:c156, 2a06:98c1:50::ac40:2156, 108.162.193.86, 172.64.33.86 and 173.245.59.86. tessa.ns.cloudflare.com points to: 2606:4700:50::a29f:26e5, 2803:f800:50::6ca2:c2e5, 2a06:98c1:50::ac40:22e5, 108.162.194.229, 162.159.38.229 and 172.64.34.229.

Mail Servers

focusfour.app is handled by three mail servers: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

focusfour.app shares mail servers with other domains at least in part, for instance hwaeng.com, tehrancharge.com, ztoh.org, webstome.com and radiogamechangers.com.

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.

focusfour.app - robtex.com

focusfour.app

app

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`focusfour.app`

`app`