stackunderflow.org - dns.ninja

🛡️Domain Reputation CheckBlocklist, phishing & malware status→

stackunderflow.org

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:5229🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:c2f4🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.82.41Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.194.244🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSblair.ns.cloudflare.com ⭐
A2606:4700:50::a29f:2679🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRblair.ns.cloudflare.com
A2803:f800:50::6ca2:c279🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRblair.ns.cloudflare.com
A2a06:98c1:50::ac40:2279🇺🇸 Cloudflare2a06:98c1:50::/45
PTRblair.ns.cloudflare.com
A108.162.194.121🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRblair.ns.cloudflare.com
A162.159.38.121Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRblair.ns.cloudflare.com
A172.64.34.121🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRblair.ns.cloudflare.com
NSmalcolm.ns.cloudflare.com
A2606:4700:58::a29f:2c51🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmalcolm.ns.cloudflare.com
A2803:f800:50::6ca2:c351🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRmalcolm.ns.cloudflare.com
A2a06:98c1:50::ac40:2351🇺🇸 Cloudflare2a06:98c1:50::/45
PTRmalcolm.ns.cloudflare.com
A108.162.195.81🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmalcolm.ns.cloudflare.com
A162.159.44.81Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmalcolm.ns.cloudflare.com
A172.64.35.81🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRmalcolm.ns.cloudflare.com
MXroute3.mx.cloudflare.net ⭐
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(9)
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
MXroute1.mx.cloudflare.net(67)
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
TXTv=spf1 include:_spf.mx.cloudflare.net ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.82.41, 172.67.194.244
IPv6 hints2606:4700:3031::6815:5229, 2606:4700:3037::ac43:c2f4
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=109, name=cloudflare-ech.com
SOAblair.ns.cloudflare.comdns@cloudflare.com serial=2413213741

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1788184285

Same first word

stackunderflow.org
stackunderflow.net
stackunderflow.com
stackunderflow.no

Similar names

stuckanderflow.com

Previous names

stackstreet.org
stackstudio.org
stacksy.org
stacksync.org
stacktalk.org
stacktech.org
stackteck.org
stacktest.org
stacktesting.org
stackthedeckagainsthate.org
stackthepixels.org
stacktic.org
stacktics.org
stacktier.org
stacktoken.org
stacktrace.org
stacktris.org
stacktrust.org
stackuk.org

Next names

stackup.org
stackupclub.org
stackuplistings.org
stackvate.org
stackview.org
stackvision.org
stackvize.org
stackwalker.org
stackwars.org
stackweaver.org
stackweb.org
stackwebcore.org
stackwine.org
stackwire.org
stackwise.org
stackworks.org
stackyard.org
stackz.org
stackzunitedtc.org

DNS History

9 records (9 active, 0 former)

NSblair.ns.cloudflare.commalcolm.ns.cloudflare.comMXroute1.mx.cloudflare.netroute2.mx.cloudflare.netroute3.mx.cloudflare.netA104.21.82.41172.67.194.2442606:4700:3031::6815:52292606:4700:3037::ac43:c2f4
●NSblair.ns.cloudflare.com2026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●NSmalcolm.ns.cloudflare.com2026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●MXroute1.mx.cloudflare.net2026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●MXroute2.mx.cloudflare.net2026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●MXroute3.mx.cloudflare.net2026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●A104.21.82.412026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●A172.67.194.2442026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●A2606:4700:3031::6815:52292026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18
●A2606:4700:3037::ac43:c2f42026-08-30 → 2026-08-31 · 2 obs
● 2026-08-30 08:19:34
● 2026-08-31 14:06:18

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org-
stackunderflow.orgmalcolm.ns.cloudflare.com, blair.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.34.121

NS records: malcolm.ns.cloudflare.com, blair.ns.cloudflare.com

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

Validation error at org: Error: DNS query timeout: 199.249.120.1 for DNSKEY org

⏱️ Timing

Total: 4022ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.82.41, 172.67.194.244
AAAA22606:4700:3031::6815:5229, 2606:4700:3037::ac43:c2f4
NS2blair.ns.cloudflare.com, malcolm.ns.cloudflare.com
MX3route3.mx.cloudflare.net (pri: 6), route1.mx.cloudflare.net (pri: 67)...
TXT1v=spf1 include:_spf.mx.cloudflare.net ~a
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1blair.ns.cloudflare.com dns.cloudflare.c

Analysis

IP Addresses

stackunderflow.org has four IP addresses: 104.21.82.41, 172.67.194.244, 2606:4700:3031::6815:5229 and 2606:4700:3037::ac43:c2f4.

Additional host names — ptt4d.site, icm-awards.com, menang188.co and two others — share IP numbers with stackunderflow.org.

Name Servers

Two name servers handle the delegation for stackunderflow.org: blair.ns.cloudflare.com and malcolm.ns.cloudflare.com.

stackunderflow.org shares its name server setup with other domains, including card-game-51s.pages.dev, taypi-web.pages.dev, chatapi-4cw.pages.dev and two others.

stackunderflow.org partially shares its NS delegation with several other domains, including checoss.com, liucabc1.workers.dev, criminallawca.com and two others.

These name servers are regularly seen alongside edward.ns.cloudflare.com and millie.ns.cloudflare.com as name servers.

Host names with 6 IP numbers:

blair.ns.cloudflare.com resolves to 108.162.194.121, 162.159.38.121 and 172.64.34.121 among others, with 3 other IP addresses in total.

malcolm.ns.cloudflare.com resolves to 108.162.195.81, 162.159.44.81 and 172.64.35.81 among others, with 3 other IP addresses in total.

Mail Servers

stackunderflow.org uses three mail servers — route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

stackunderflow.org shares mail servers — at least in part — with other domains, including yakoob.co.uk, betwinnerchile.com, w-betz.es and two others.

Host names with 6 IP numbers:

route1.mx.cloudflare.net resolves to 162.159.205.11, 162.159.205.12 and 162.159.205.13 among others, with 3 other IP addresses in total.

route2.mx.cloudflare.net resolves to 162.159.205.17, 162.159.205.18 and 162.159.205.19 among others, with 3 other IP addresses in total.

route3.mx.cloudflare.net resolves to 162.159.205.23, 162.159.205.24 and 162.159.205.25 among others, with 3 other IP addresses in total.