🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`stackfocus.app`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:2709^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3033::ac43:8dd0^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.39.9^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.141.208^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`demi.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a5f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`demi.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c05f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`demi.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:205f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`demi.ns.cloudflare.com`
		A	108.162.192.95^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`demi.ns.cloudflare.com`
		A	172.64.32.95^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`demi.ns.cloudflare.com`
		A	173.245.58.95^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`demi.ns.cloudflare.com`
NS	`houston.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c34^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`houston.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c334^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`houston.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2334^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`houston.ns.cloudflare.com`
		A	108.162.195.52^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`houston.ns.cloudflare.com`
		A	162.159.44.52^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`houston.ns.cloudflare.com`
		A	172.64.35.52^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`houston.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`⁽³⁴⁾
		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`⁽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`
TXT	`hosting-site=stackfocus-b1d91`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.39.9, 172.67.141.208
		IPv6 hints	2606:4700:3033::6815:2709, 2606:4700:3033::ac43:8dd0
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=56, name=cloudflare-ech.com
SOA	`demi.ns.cloudflare.com`dns@cloudflare.com serial=2410101184

`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

stackfocus.app

stackfocus.com

Similar names

focusstack.com

focustacks.com

Previous names

Next names

DNS History

9 records (9 active, 0 former)

●NSdemi.ns.cloudflare.com2026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●NShouston.ns.cloudflare.com2026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●MXroute1.mx.cloudflare.net2026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●MXroute2.mx.cloudflare.net2026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●MXroute3.mx.cloudflare.net2026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●A104.21.39.92026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●A172.67.141.2082026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●A2606:4700:3033::6815:27092026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

●A2606:4700:3033::ac43:8dd02026-08-18 → 2026-08-25 · 2 obs

● 2026-08-18 18:14:54
● 2026-08-25 10:48:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld2.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com...	-
stackfocus.app	demi.ns.cloudflare.com, houston.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.35.52

NS records: demi.ns.cloudflare.com, houston.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackfocus.app (unsigned zone)

⏱️ Timing

Total: 1041ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.141.208, 104.21.39.9`
AAAA	2	`2606:4700:3033::6815:2709, 2606:4700:3033::ac43:8dd0`
NS	2	`demi.ns.cloudflare.com, houston.ns.cloudflare.com`
MX	3	`route1.mx.cloudflare.net (pri: 30), route3.mx.cloudflare.net (pri: 34)...`
TXT	2	`hosting-site=stackfocus-b1d91, v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`demi.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

stackfocus.app points to the four IP addresses 104.21.39.9, 172.67.141.208, 2606:4700:3033::6815:2709 and 2606:4700:3033::ac43:8dd0.

amd-singapore.com, www.moldremediationfortlauderdale.com.cdn.cloudflare.net, www.specialolympics.org.br and two other host names share IP numbers with stackfocus.app.

Name Servers

The NS records for stackfocus.app delegate to demi.ns.cloudflare.com and houston.ns.cloudflare.com.

stackfocus.app uses the same name servers as several other domains — among them casinosenzainviodocumenti.com, claim-aethir.xyz, tomas-kolafa.workers.dev and two more.

The name servers of stackfocus.app overlap at least partially with those of other domains — among them 0kk7yhs19b.pages.dev, midwesthsr.org, hodening.site and two more.

These name servers commonly appear in combination with the name servers marvin.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

demi.ns.cloudflare.com maps to 108.162.192.95, 172.64.32.95, 173.245.58.95 and 3 additional IP addresses.

houston.ns.cloudflare.com maps to 108.162.195.52, 162.159.44.52, 172.64.35.52 and 3 additional IP addresses.

Mail Servers

Mail for stackfocus.app is routed through three mail servers — route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

stackfocus.app has at least partial mail server overlap with other domains such as snowboardforbundet.com, sjoblom.me, noypiclassic.com and two more.

Hostnames that resolve to 6 IP addresses:

route1.mx.cloudflare.net maps to 162.159.205.11, 162.159.205.12, 162.159.205.13 and 3 additional IP addresses.

route2.mx.cloudflare.net maps to 162.159.205.17, 162.159.205.18, 162.159.205.19 and 3 additional IP addresses.

route3.mx.cloudflare.net maps to 162.159.205.23, 162.159.205.24, 162.159.205.25 and 3 additional IP addresses.

stackfocus.app - robtex.com

stackfocus.app

app

Same first word

Similar names

Previous names

Next names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`stackfocus.app`

`app`