AS99990004
Cloudflare
Cloudflare Cloud
Cloud Provider
Cloudflare
On this page
ASN Overview
ASN Number
AS99990004
Organization
Cloudflare
Country
US
Category
cloud
Website
https://www.cloudflare.com
About This Network
Cloudflare operates one of the world's largest anycast networks, spanning more than 300 cities globally. Its IP ranges are used for CDN edge delivery, DDoS protection, Zero Trust access, and DNS resolution. Web servers commonly allowlist these ranges so that real visitor IPs are preserved in logs when traffic arrives via Cloudflare's proxy.
cloud
US
22 prefixes
Operated by:
Cloudflare
IP Ranges
| CIDR | Hosts | Version |
|---|---|---|
| 2803:f800::/32 | 9223372036854775807 | IPv6 |
| 2405:8100::/32 | 9223372036854775807 | IPv6 |
| 2c0f:f248::/32 | 9223372036854775807 | IPv6 |
| 2a06:98c0::/29 | 9223372036854775807 | IPv6 |
| 2405:b500::/32 | 9223372036854775807 | IPv6 |
| 2400:cb00::/32 | 9223372036854775807 | IPv6 |
| 2606:4700::/32 | 9223372036854775807 | IPv6 |
| 104.16.0.0/13 | 524288 | IPv4 |
| 172.64.0.0/13 | 524288 | IPv4 |
| 104.24.0.0/14 | 262144 | IPv4 |
| 162.158.0.0/15 | 131072 | IPv4 |
| 198.41.128.0/17 | 32768 | IPv4 |
| 108.162.192.0/18 | 16384 | IPv4 |
| 141.101.64.0/18 | 16384 | IPv4 |
| 188.114.96.0/20 | 4096 | IPv4 |
| 190.93.240.0/20 | 4096 | IPv4 |
| 173.245.48.0/20 | 4096 | IPv4 |
| 103.21.244.0/22 | 1024 | IPv4 |
| 131.0.72.0/22 | 1024 | IPv4 |
| 197.234.240.0/22 | 1024 | IPv4 |