stackfocus.app - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

stackfocus.app

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:2709🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:8dd0🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.39.9Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.141.208🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSdemi.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3a5f🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdemi.ns.cloudflare.com
A2803:f800:50::6ca2:c05f🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRdemi.ns.cloudflare.com
A2a06:98c1:50::ac40:205f🇺🇸 Cloudflare2a06:98c1:50::/45
PTRdemi.ns.cloudflare.com
A108.162.192.95🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdemi.ns.cloudflare.com
A172.64.32.95🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdemi.ns.cloudflare.com
A173.245.58.95🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdemi.ns.cloudflare.com
NShouston.ns.cloudflare.com
A2606:4700:58::a29f:2c34🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhouston.ns.cloudflare.com
A2803:f800:50::6ca2:c334🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRhouston.ns.cloudflare.com
A2a06:98c1:50::ac40:2334🇺🇸 Cloudflare2a06:98c1:50::/45
PTRhouston.ns.cloudflare.com
A108.162.195.52🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhouston.ns.cloudflare.com
A162.159.44.52Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhouston.ns.cloudflare.com
A172.64.35.52🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRhouston.ns.cloudflare.com
MXroute1.mx.cloudflare.net ⭐
A2606:4700:f5::b🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute1.mx.cloudflare.net
A2606:4700:f5::c🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute1.mx.cloudflare.net
A2606:4700:f5::d🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute1.mx.cloudflare.net
A162.159.205.11Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute1.mx.cloudflare.net
A162.159.205.12Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute1.mx.cloudflare.net
A162.159.205.13Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute1.mx.cloudflare.net
MXroute3.mx.cloudflare.net(34)
A2606:4700:f5::11🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute3.mx.cloudflare.net
A2606:4700:f5::12🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute3.mx.cloudflare.net
A2606:4700:f5::13🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute3.mx.cloudflare.net
A162.159.205.23Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute3.mx.cloudflare.net
A162.159.205.24Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute3.mx.cloudflare.net
A162.159.205.25Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute3.mx.cloudflare.net
MXroute2.mx.cloudflare.net(50)
A2606:4700:f5::e🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute2.mx.cloudflare.net
A2606:4700:f5::f🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute2.mx.cloudflare.net
A2606:4700:f5::10🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute2.mx.cloudflare.net
A162.159.205.17Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute2.mx.cloudflare.net
A162.159.205.18Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute2.mx.cloudflare.net
A162.159.205.19Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRroute2.mx.cloudflare.net
TXThosting-site=stackfocus-b1d91
TXTv=spf1 include:_spf.mx.cloudflare.net ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.39.9, 172.67.141.208
IPv6 hints2606:4700:3033::6815:2709, 2606:4700:3033::ac43:8dd0
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=215, name=cloudflare-ech.com
SOAdemi.ns.cloudflare.comdns@cloudflare.com serial=2410101184

app

DNSSEC🔒 Signed (DS record present)
NSns-tld1.charlestonroadregistry.com ⭐
NSns-tld2.charlestonroadregistry.com
NSns-tld3.charlestonroadregistry.com
NSns-tld4.charlestonroadregistry.com
NSns-tld5.charlestonroadregistry.com
SOAns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=101427
🔒 HSTS Preload (+subdomains)

Same first word

stackfocus.app
stackfocus.com

Similar names

focusstack.com
focustacks.com

Previous names

stackapps.app
stackbit.app
stackblaze.app
stackbuild.app
stackcalc.app
stackcenter.app
stackcode.app
stackcrafter.app
stackdd.app
stackdesign.app
stackdesk.app
stackdose.app
stackeat.app
stackedclub.app
stackedfantasy.app
stacker.app
stackerchest.app
stackerlegend.app
stackers.app

Next names

stackfold.app
stackfolio.app
stackgg.app
stackgolink.app
stackhack.app
stackheim.app
stackhero.app
stackify.app
stackinvest.app
stackitup.app
stackkodana.app
stackle.app
stacklint.app
stacklist.app
stackmapper.app
stackmatchmaker.app
stackmatix.app
stackmax.app
stackmix.app
stackon.app

DNS History

9 records (9 active, 0 former)

NSdemi.ns.cloudflare.comhouston.ns.cloudflare.comMXroute1.mx.cloudflare.netroute2.mx.cloudflare.netroute3.mx.cloudflare.netA104.21.39.9172.67.141.2082606:4700:3033::6815:27092606:4700:3033::ac43:8dd0
●NSdemi.ns.cloudflare.com2026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●NShouston.ns.cloudflare.com2026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●MXroute1.mx.cloudflare.net2026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●MXroute2.mx.cloudflare.net2026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●MXroute3.mx.cloudflare.net2026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●A104.21.39.92026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●A172.67.141.2082026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●A2606:4700:3033::6815:27092026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22
●A2606:4700:3033::ac43:8dd02026-08-18 → 2026-08-25 · 2 obs
● 2026-08-18 18:14:54
● 2026-08-25 20:35:22

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
appns-tld2.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com...-
stackfocus.apphouston.ns.cloudflare.com, demi.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.192.95

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stackfocus.app (unsigned zone)

⏱️ Timing

Total: 857ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.39.9, 172.67.141.208
AAAA22606:4700:3033::6815:2709, 2606:4700:3033::ac43:8dd0
NS2demi.ns.cloudflare.com, houston.ns.cloudflare.com
MX3route1.mx.cloudflare.net (pri: 30), route3.mx.cloudflare.net (pri: 34)...
TXT2hosting-site=stackfocus-b1d91, v=spf1 include:_spf.mx.cloudflare.net ~a
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1demi.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

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

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

Name Servers

stackfocus.app has two authoritative name servers — demi.ns.cloudflare.com and houston.ns.cloudflare.com.

stackfocus.app has the same name server delegation as a number of other domains, such as casinosenzainviodocumenti.com, claim-aethir.xyz, tomas-kolafa.workers.dev and two more.

stackfocus.app has at least partial name server overlap with other domains, such as 0kk7yhs19b.pages.dev, midwesthsr.org, hodening.site and two others.

It is common to find these name servers paired with the name servers marvin.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

demi.ns.cloudflare.com points to 108.162.192.95, 172.64.32.95, 173.245.58.95 and 3 other IP addresses.

houston.ns.cloudflare.com points to 108.162.195.52, 162.159.44.52, 172.64.35.52 and 3 other IP addresses.

Mail Servers

stackfocus.app has three mail servers: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

stackfocus.app shares at least some of its mail servers with other domains — for example snowboardforbundet.com, sjoblom.me, noypiclassic.com and two more.

Host names resolving to 6 IP numbers:

route1.mx.cloudflare.net points to 162.159.205.11, 162.159.205.12, 162.159.205.13 and 3 other IP addresses.

route2.mx.cloudflare.net points to 162.159.205.17, 162.159.205.18, 162.159.205.19 and 3 other IP addresses.

route3.mx.cloudflare.net points to 162.159.205.23, 162.159.205.24, 162.159.205.25 and 3 other IP addresses.