United States · CDN
AS13335
Cloudflare, Inc.
CDN ARIN CLOUDFLARENET
An address in this ASN is almost never an origin — it is Cloudflare fronting someone else. Anycast means the same prefix answers from dozens of cities, so geolocating it tells you where you are, not where the server is.
CDN — Edge and reverse-proxy infrastructure. Rarely an origin for user traffic.
- Announced prefixes
- 7
- 6 IPv4 · 1 IPv6
- IPv4 addresses
- 1.2M
- across the blocks listed below
- Largest block
- /13
- smallest prefix length announced
- Registry
- ARIN
- CLOUDFLARENET
01 Ranges
Announced ranges
The blocks AS13335 advertises to the rest of the internet in this snapshot. A production routing table carries more — large carriers de-aggregate for traffic engineering — so treat the totals as a floor.
Matched in your browser against the 7 blocks below. Nothing is sent anywhere.
IPv4 — 6 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 1.1.1.0/24 | 1.1.1.0 | 1.1.1.255 | 256 |
| 103.21.244.0/22 | 103.21.244.0 | 103.21.247.255 | 1,024 |
| 104.16.0.0/13 | 104.16.0.0 | 104.23.255.255 | 524,288 |
| 162.158.0.0/15 | 162.158.0.0 | 162.159.255.255 | 131,072 |
| 172.64.0.0/13 | 172.64.0.0 | 172.71.255.255 | 524,288 |
| 173.245.48.0/20 | 173.245.48.0 | 173.245.63.255 | 4,096 |
IPv6 — 1 blocks
| Prefix | First address | Last address | Addresses |
|---|---|---|---|
| 2606:4700::/32 | 2606:4700:: | 2606:4700:ffff:ffff:ffff:ffff:ffff:ffff | 2^96 |