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Cloudflare IP Ranges

Cloudflare operates one of the largest CDN and DDoS protection networks globally, serving over 20 percent of all websites. It also runs the 1.1.1.1 public DNS resolver and Cloudflare Workers serverless platform.

CDN
Provider
Cloudflare
Primary ASN
AS13335
Category
CDN
Headquarters
San Francisco, CA, USA
IP Geolocation LookupWHOIS LookupVPN Leak Test

Known IP ranges

The following IP prefixes are registered to Cloudflare or commonly associated with their network. Full prefix sets change over time — use WHOIS Lookup for the authoritative current record for any specific IP.

104.16.0.0/12
172.64.0.0/13
162.158.0.0/15
198.41.128.0/17
188.114.96.0/20
104.24.0.0/14

What does a Cloudflare IP mean in a privacy test?

A Cloudflare IP in a privacy or VPN test typically means your browsing traffic routes through the Cloudflare CDN, you are using the 1.1.1.1 DNS resolver, or your VPN provider uses Cloudflare infrastructure for its network layer.

Related tools

IP Geolocation LookupLook up any Cloudflare IP for location and ASN data.WHOIS LookupView the registered CIDR block and organization for any IP.VPN Leak TestCheck if your VPN is leaking your real IP, DNS, or WebRTC data.AS13335 — Cloudflare ASN pageMore details about this network.What Is a DNS Leak?Related privacy resource.DNS Leak TestRelated privacy resource.

Frequently asked questions

What IP ranges does Cloudflare use?

Cloudflare controls hundreds of IP blocks. Major ranges include 104.16.0.0/12, 172.64.0.0/13, 162.158.0.0/15, and 198.41.128.0/17. Cloudflare publishes its full current IP list at cloudflare.com/ips.

Why does a Cloudflare IP appear in my VPN test?

A Cloudflare IP as your exit may mean your VPN uses Cloudflare infrastructure, or your traffic routes through a Cloudflare-hosted server. It also appears in DNS tests if your resolver is 1.1.1.1.

Is Cloudflare 1.1.1.1 safe to use as a DNS resolver?

Cloudflare commits to not selling DNS query data and deleting query logs within 24 hours. It supports DoH and DoT. Quad9 (9.9.9.9) is a non-profit alternative with strong privacy commitments.

How do I look up a Cloudflare IP address?

Use MyIPScan IP Geolocation Lookup. Cloudflare IPs return AS13335 with the registered location. For the full CIDR block, use the WHOIS Lookup tool.

What ASN does Cloudflare use?

Cloudflare primarily uses AS13335. Details including known IP ranges and network description are on the MyIPScan AS13335 ASN page.