web.ctflearn.com - dns.ninja

web.ctflearn.com

DNSSEC⚠️ Not signed
A2606:4700:3032::ac43:9db2🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:e25🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.14.37Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.157.178🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.14.37, 172.67.157.178
IPv6 hints2606:4700:3032::ac43:9db2, 2606:4700:3037::6815:e25
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=10, name=cloudflare-ech.com

ctflearn.com

DNSSEC⚠️ Not signed
A2606:4700:3032::ac43:9db2🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:e25🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.14.37Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.157.178🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSfred.ns.cloudflare.com ⭐
NSnina.ns.cloudflare.com
MXmx1.privateemail.com ⭐
MXmx2.privateemail.com ⭐
TXTgoogle-site-verification=c2ZlyDiwO5tjU77wgvCpx76_fSKKDKYiPtw3ks3HiHA
TXTv=spf1 include:spf.privateemail.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.14.37, 172.67.157.178
IPv6 hints2606:4700:3032::ac43:9db2, 2606:4700:3037::6815:e25
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=10, name=cloudflare-ech.com
SOAfred.ns.cloudflare.comdns@cloudflare.com serial=2411817678
rank #271712 globally
rank #110564 in the tld

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DNS History

14 records (4 active, 10 former)

2020202120222023202420252026A104.21.14.37172.67.157.1782606:4700:3032::ac43:9db22606:4700:3037::6815:e25104.31.66.79104.31.67.79172.67.142.2482606:4700:30::681f:424f2606:4700:30::681f:434f2606:4700:3032::ac43:8ef82606:4700:3033::681f:434f2606:4700:3034::6815:e252606:4700:3036::681f:424f2606:4700:3036::ac43:9db2
●A104.21.14.372026-02-18 → 2026-08-13 · 3 obs
○ 2020-11-30 23:53:30
● 2026-02-18 18:59:52
● 2026-08-13 15:49:42
○A104.31.66.792019-07-26 → 2020-11-30 · 4 obs
● 2019-07-26 06:43:32
● 2020-11-30 23:53:30
○ 2026-02-18 18:59:52
○ 2026-08-13 15:49:42
○A104.31.67.792019-07-26 → 2020-11-30 · 4 obs
● 2019-07-26 06:43:32
● 2020-11-30 23:53:30
○ 2026-02-18 18:59:52
○ 2026-08-13 15:49:42
○A172.67.142.2482020-11-30 → 2020-11-30 · 4 obs
○ 2020-04-30 21:05:54
● 2020-11-30 23:53:30
○ 2026-02-18 18:59:52
○ 2026-08-13 15:49:42
●A172.67.157.1782026-02-18 → 2026-08-13 · 3 obs
○ 2020-11-30 23:53:30
● 2026-02-18 18:59:52
● 2026-08-13 15:49:42
○A2606:4700:30::681f:424f2019-07-26 → 2019-07-26 · 3 obs
● 2019-07-26 06:43:32
○ 2020-04-30 21:05:54
○ 2026-08-13 15:49:42
○A2606:4700:30::681f:434f2019-07-26 → 2019-07-26 · 3 obs
● 2019-07-26 06:43:32
○ 2020-04-30 21:05:54
○ 2026-08-13 15:49:42
○A2606:4700:3032::ac43:8ef82020-11-30 → 2020-11-30 · 4 obs
○ 2020-04-30 21:05:54
● 2020-11-30 23:53:30
○ 2026-02-18 18:59:52
○ 2026-08-13 15:49:42
●A2606:4700:3032::ac43:9db22026-07-09 → 2026-08-13 · 3 obs
○ 2026-06-08 16:55:24
● 2026-07-09 19:25:06
● 2026-08-13 15:49:42
○A2606:4700:3033::681f:434f2020-04-30 → 2020-11-30 · 5 obs
○ 2019-07-26 06:43:32
● 2020-04-30 21:05:54
● 2020-11-30 23:53:30
○ 2026-02-18 18:59:52
○ 2026-08-13 15:49:42
○A2606:4700:3034::6815:e252026-02-18 → 2026-06-08 · 5 obs
○ 2020-11-30 23:53:30
● 2026-02-18 18:59:52
● 2026-06-08 16:55:24
○ 2026-07-09 19:25:06
○ 2026-08-13 15:49:42
○A2606:4700:3036::681f:424f2020-04-30 → 2020-11-30 · 5 obs
○ 2019-07-26 06:43:32
● 2020-04-30 21:05:54
● 2020-11-30 23:53:30
○ 2026-02-18 18:59:52
○ 2026-08-13 15:49:42
○A2606:4700:3036::ac43:9db22026-02-18 → 2026-06-08 · 5 obs
○ 2020-11-30 23:53:30
● 2026-02-18 18:59:52
● 2026-06-08 16:55:24
○ 2026-07-09 19:25:06
○ 2026-08-13 15:49:42
●A2606:4700:3037::6815:e252026-07-09 → 2026-08-13 · 3 obs
○ 2026-06-08 16:55:24
● 2026-07-09 19:25:06
● 2026-08-13 15:49:42

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comc.gtld-servers.net, i.gtld-servers.net, m.gtld-servers.net, b.gtld-servers.net...-
ctflearn.comfred.ns.cloudflare.com, nina.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.192.136

NS records: fred.ns.cloudflare.com, nina.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ctflearn.com (unsigned zone)

⏱️ Timing

Total: 240ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.14.37, 172.67.157.178
AAAA22606:4700:3032::ac43:9db2, 2606:4700:3037::6815:e25
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (fred.ns.cloudflare.com, fred.ns.cloudflare.com, fred.ns.cloudflare.com...)

Analysis

IP Addresses

web.ctflearn.com has four IP addresses: 104.21.14.37, 172.67.157.178, 2606:4700:3032::ac43:9db2 and 2606:4700:3037::6815:e25.

Among the host names that share IP numbers with web.ctflearn.com are bobolike.com, inque.org, gentingcasino-ie.com and two others.