`checks1.cdn221.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::6815:faa^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:a350^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.15.170^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.163.80^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.15.170, 172.67.163.80
		IPv6 hints	2606:4700:3031::6815:faa, 2606:4700:3036::ac43:a350
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=148, name=cloudflare-ech.com

`cdn221.com`

	DNSSEC	⚠️ Not signed
	NS	`fiona.ns.cloudflare.com` ⭐
	NS	`jason.ns.cloudflare.com`
	SOA	`fiona.ns.cloudflare.com`dns@cloudflare.com serial=2408020817

📈 Tranco rank: #314,208

Similar names

1checks.com

DNS History

5 records (4 active, 1 former)

●A104.21.15.1702026-06-21 → 2026-08-03 · 2 obs

● 2026-06-21 22:09:14
● 2026-08-03 12:59:42

●A172.67.163.802026-06-21 → 2026-08-03 · 2 obs

● 2026-06-21 22:09:14
● 2026-08-03 12:59:42

●A2606:4700:3031::6815:faa2026-06-27 → 2026-08-03 · 3 obs

○ 2026-06-21 22:09:14
● 2026-06-27 20:03:48
● 2026-08-03 12:59:42

○A2606:4700:3035::6815:faa2026-06-21 → 2026-06-21 · 3 obs

● 2026-06-21 22:09:14
○ 2026-06-27 20:03:48
○ 2026-08-03 12:59:42

●A2606:4700:3036::ac43:a3502026-06-21 → 2026-08-03 · 2 obs

● 2026-06-21 22:09:14
● 2026-08-03 12:59:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, h.gtld-servers.net, m.gtld-servers.net, b.gtld-servers.net...	-
cdn221.com	fiona.ns.cloudflare.com, jason.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.179

NS records: fiona.ns.cloudflare.com, jason.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cdn221.com (unsigned zone)

⏱️ Timing

Total: 136ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.15.170, 172.67.163.80`
AAAA	2	`2606:4700:3036::ac43:a350, 2606:4700:3031::6815:faa`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

checks1.cdn221.com points to the four IP addresses 104.21.15.170, 172.67.163.80, 2606:4700:3031::6815:faa and 2606:4700:3036::ac43:a350.

Two other host names, along with yxlqsj.com, chatkonnect.com and tesd-52027.sciencepav.ru, also share IP numbers with checks1.cdn221.com.

checks1.cdn221.com - robtex.com