ns2.tech21.com.cn - robtex.com

ns2.tech21.com.cn

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:9024🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::6815:371a🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.55.26Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.144.36🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.55.26, 172.67.144.36
IPv6 hints2606:4700:3030::ac43:9024, 2606:4700:3033::6815:371a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=155, name=cloudflare-ech.com

tech21.com.cn

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:9024🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::6815:371a🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.55.26Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.144.36🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSnelci.ns.cloudflare.com ⭐
NSyoxall.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.55.26, 172.67.144.36
IPv6 hints2606:4700:3030::ac43:9024, 2606:4700:3033::6815:371a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=155, name=cloudflare-ech.com
SOAnelci.ns.cloudflare.comdns@cloudflare.com serial=2400835838

Previously NS for

tech21.com.cn

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DNS History

9 records (4 active, 5 former)

2017201820192020202120222023202420252026A104.21.55.26172.67.144.362606:4700:3030::ac43:90242606:4700:3033::6815:371a123.59.142.241188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●A104.21.55.262026-03-04 → 2026-04-27 · 8 obs
○ 2016-08-04 01:54:38
● 2026-03-04 07:10:56
● 2026-03-18 13:44:54
○ 2026-03-21 23:46:38
● 2026-03-26 16:53:10
○ 2026-03-26 18:27:04
● 2026-04-17 12:37:24
● 2026-04-27 07:38:12
○A123.59.142.2412016-08-04 → 2016-08-04 · 3 obs
● 2016-08-04 01:54:38
○ 2026-03-04 07:10:56
○ 2026-04-27 07:38:12
●A172.67.144.362026-03-04 → 2026-04-27 · 8 obs
○ 2016-08-04 01:54:38
● 2026-03-04 07:10:56
● 2026-03-18 13:44:54
○ 2026-03-21 23:46:38
● 2026-03-26 16:53:10
○ 2026-03-26 18:27:04
● 2026-04-17 12:37:24
● 2026-04-27 07:38:12
○A188.114.96.02026-03-21 → 2026-03-26 · 6 obs
○ 2026-03-18 13:44:54
● 2026-03-21 23:46:38
○ 2026-03-26 16:53:10
● 2026-03-26 18:27:04
○ 2026-04-17 12:37:24
○ 2026-04-27 07:38:12
○A188.114.97.02026-03-21 → 2026-03-26 · 6 obs
○ 2026-03-18 13:44:54
● 2026-03-21 23:46:38
○ 2026-03-26 16:53:10
● 2026-03-26 18:27:04
○ 2026-04-17 12:37:24
○ 2026-04-27 07:38:12
●A2606:4700:3030::ac43:90242026-03-04 → 2026-04-27 · 7 obs
○ 2016-08-04 01:54:38
● 2026-03-04 07:10:56
● 2026-03-18 13:44:54
○ 2026-03-21 23:46:38
○ 2026-03-26 18:27:04
● 2026-04-17 12:37:24
● 2026-04-27 07:38:12
●A2606:4700:3033::6815:371a2026-03-04 → 2026-04-27 · 7 obs
○ 2016-08-04 01:54:38
● 2026-03-04 07:10:56
● 2026-03-18 13:44:54
○ 2026-03-21 23:46:38
○ 2026-03-26 18:27:04
● 2026-04-17 12:37:24
● 2026-04-27 07:38:12
○A2a06:98c1:3120::2026-03-21 → 2026-03-26 · 5 obs
○ 2026-03-18 13:44:54
● 2026-03-21 23:46:38
● 2026-03-26 18:27:04
○ 2026-04-17 12:37:24
○ 2026-04-27 07:38:12
○A2a06:98c1:3121::2026-03-21 → 2026-03-26 · 5 obs
○ 2026-03-18 13:44:54
● 2026-03-21 23:46:38
● 2026-03-26 18:27:04
○ 2026-04-17 12:37:24
○ 2026-04-27 07:38:12

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cna.dns.cn, c.dns.cn, d.dns.cn, e.dns.cn...-
tech21.com.cnnelci.ns.cloudflare.com, yoxall.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.195.47

NS records: nelci.ns.cloudflare.com, yoxall.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for tech21.com.cn (unsigned zone)

⏱️ Timing

Total: 1455ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.55.26, 172.67.144.36
AAAA22606:4700:3033::6815:371a, 2606:4700:3030::ac43:9024
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

ns2.tech21.com.cn resolves to four IPs: 2606:4700:3030::ac43:9024, 2606:4700:3033::6815:371a, 104.21.55.26 and 172.67.144.36.

Other host names, for instance truthbyfireministries.net, www.dpc.rs, binbox.io, summitspindaily.com and fire.cl0udriver.ru share IP numbers with ns2.tech21.com.cn.