`sub.zeronoiseclassroom.com`

DNSSEC	⚠️ Not signed
A	104.21.87.187^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.145.156^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.87.187, 172.67.145.156

`zeronoiseclassroom.com`

DNSSEC	⚠️ Not signed
A	104.21.87.187^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.145.156^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`adel.ns.cloudflare.com` ⭐
NS	`ned.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.87.187, 172.67.145.156
SOA	`adel.ns.cloudflare.com`dns@cloudflare.com serial=2399624732

⚠️ On DNS blocklist: tif
📈 Tranco rank: #994,593

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DNS History

2 records (2 active, 0 former)

●A104.21.87.1872026-02-25 → 2026-03-22 · 2 obs

● 2026-02-25 08:14:22
● 2026-03-22 23:14:22

●A172.67.145.1562026-02-25 → 2026-03-22 · 2 obs

● 2026-02-25 08:14:22
● 2026-03-22 23:14:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
zeronoiseclassroom.com	adel.ns.cloudflare.com, ned.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.55

NS records: adel.ns.cloudflare.com, ned.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for zeronoiseclassroom.com (unsigned zone)

⏱️ Timing

Total: 112ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.87.187, 172.67.145.156`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

sub.zeronoiseclassroom.com points to two IP numbers: 104.21.87.187 and 172.67.145.156.

Other host names, for instance ocnweb.com, oui.zeronoiseclassroom.com, comercialworkshop.com, longxintw.com and mail.invictushome.com share IP numbers with sub.zeronoiseclassroom.com.

sub.zeronoiseclassroom.com - robtex.com