null.include.cz - robtex.com

null.include.cz

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:1cec🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:93ca🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.28.236Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.147.202🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.28.236, 172.67.147.202
IPv6 hints2606:4700:3036::6815:1cec, 2606:4700:3037::ac43:93ca
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=144, name=cloudflare-ech.com

include.cz

DNSSEC⚠️ Not signed
A2606:4700:3036::6815:1cec🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:93ca🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.28.236Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.147.202🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSchad.ns.cloudflare.com ⭐
NSkia.ns.cloudflare.com
MXaspmx.l.google.com ⭐
MXalt1.aspmx.l.google.com(20)
MXalt2.aspmx.l.google.com(20)
MXaspmx2.googlemail.com(30)
MXaspmx3.googlemail.com(30)
MXaspmx4.googlemail.com(30)
MXaspmx5.googlemail.com(30)
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.28.236, 172.67.147.202
IPv6 hints2606:4700:3036::6815:1cec, 2606:4700:3037::ac43:93ca
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=144, name=cloudflare-ech.com
SOAchad.ns.cloudflare.comdns@cloudflare.com serial=2410125954

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DNS History

4 records (4 active, 0 former)

A104.21.28.236172.67.147.2022606:4700:3036::6815:1cec2606:4700:3037::ac43:93ca
●A104.21.28.2362026-07-19 → 2026-07-21 · 2 obs
● 2026-07-19 05:25:28
● 2026-07-21 18:19:04
●A172.67.147.2022026-07-19 → 2026-07-21 · 2 obs
● 2026-07-19 05:25:28
● 2026-07-21 18:19:04
●A2606:4700:3036::6815:1cec2026-07-19 → 2026-07-21 · 2 obs
● 2026-07-19 05:25:28
● 2026-07-21 18:19:04
●A2606:4700:3037::ac43:93ca2026-07-19 → 2026-07-21 · 2 obs
● 2026-07-19 05:25:28
● 2026-07-21 18:19:04

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz-
include.czkia.ns.cloudflare.com, chad.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.82

NS records: kia.ns.cloudflare.com, chad.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for include.cz (unsigned zone)

⏱️ Timing

Total: 2714ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.147.202, 104.21.28.236
AAAA22606:4700:3037::ac43:93ca, 2606:4700:3036::6815:1cec
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

null.include.cz directs to four IP numbers, which are 104.21.28.236, 172.67.147.202, 2606:4700:3036::6815:1cec and 2606:4700:3037::ac43:93ca.

Among the host names that share IP numbers with null.include.cz are revy.include.cz, doctorsis.com, ev-connection.com and two others.