🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`openai.rainfd.workers.dev`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:9210^{Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:3f8a^{Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.63.138^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.146.16^{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 hints	104.21.63.138, 172.67.146.16
		IPv6 hints	2606:4700:3031::ac43:9210, 2606:4700:3037::6815:3f8a
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=161, name=cloudflare-ech.com

`rainfd.workers.dev`

	DNSSEC	⚠️ Not signed
	NS	`aliza.ns.cloudflare.com` ⭐
	NS	`kurt.ns.cloudflare.com`
	SOA	`aliza.ns.cloudflare.com`dns@cloudflare.com serial=2417100816

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DNS History

4 records (4 active, 0 former)

●A104.21.63.1382026-06-25 → 2026-10-16 · 2 obs

● 2026-06-25 13:53:34
● 2026-10-16 02:43:58

●A172.67.146.162026-06-25 → 2026-10-16 · 2 obs

● 2026-06-25 13:53:34
● 2026-10-16 02:43:58

●A2606:4700:3031::ac43:92102026-06-25 → 2026-10-16 · 2 obs

● 2026-06-25 13:53:34
● 2026-10-16 02:43:58

●A2606:4700:3037::6815:3f8a2026-06-25 → 2026-10-16 · 2 obs

● 2026-06-25 13:53:34
● 2026-10-16 02:43:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld5.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...	-
workers.dev	clyde.ns.cloudflare.com, sofia.ns.cloudflare.com	-
rainfd.workers.dev	aliza.ns.cloudflare.com, kurt.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.34.55

NS records: aliza.ns.cloudflare.com, kurt.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for workers.dev (unsigned zone)

⏱️ Timing

Total: 2657ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.63.138, 172.67.146.16`
AAAA	2	`2606:4700:3031::ac43:9210, 2606:4700:3037::6815:3f8a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`

Analysis

IP Addresses

openai.rainfd.workers.dev points to the four IP addresses 104.21.63.138, 172.67.146.16, 2606:4700:3031::ac43:9210 and 2606:4700:3037::6815:3f8a.

openai.rainfd.workers.dev - robtex.com