CDN · file snapshot 2026-09-21
Cloudflare IP ranges
The Cloudflare file fetched on 2026-09-21 contained 15 distinct IPv4 prefix strings and 7 IPv6 prefix strings. Inspect the source URL, recorded fields and content hash below.
- IPv4
- 15
- IPv6
- 7
- Fetched
- 2026-09-21
- Publisher
- Cloudflare
- Category
- CDN
- IPv4 prefix strings
- 15
- IPv6 prefix strings
- 7
- Source file
- https://api.cloudflare.com/client/v4/ips
- File format
- JSON
- Size
- 505 bytes
- Fetched (UTC)
- SHA-256
- f3d0a35768afd4a9a8307aa1033d50b9fa011b73836c9235c170aa31acac5efd
File measurement
Distinct valid prefix strings in the downloaded file. Overlapping prefixes are kept, so the count describes entries, not address-space size.
- 15
- IPv4 prefix strings
- 7
- IPv6 prefix strings
- 505
- bytes
- JSON
- file format
Fields recorded from the file
Literal field names and values. A timestamp or counter is shown without assigning an update schedule to it.
| Field | Value |
|---|---|
| etag | 38f79d050aa027e3be3865e495dcc9bc |
No selected facet values were collected by this measurement.
Reproduce the count
Save the linked source as
provider-file, download the Python measurement script, then run it. The result includes counts, fields and a hash; a different hash means you measured different bytes. Full counting method.python3 ip-ranges-measure.py provider-fileASN reference records
Holder names were read from RIPEstat on the dates below. These are separately selected reference records, not a mapping of every prefix to its origin ASN. A listed holder may differ from the provider named on this page.
Interpreting this snapshot
- Where is the Cloudflare IP range file?
- The selected snapshot was downloaded from https://api.cloudflare.com/client/v4/ips. The source and documentation links on this page let you inspect the publisher's current data and scope.
- What does a matching prefix establish?
- A match means an address falls inside a prefix in this selected file. The measurement does not establish the identity of a requester, a device location or ownership of every address. Check the publisher’s documentation before applying access rules.
- How often is this file updated?
- This record measures the file fetched at 2026-09-21T19:35:30.471823+00:00. Publisher fields are reproduced as recorded, without inferring a future update schedule. Download the current source and compare hashes to check for a change.
To test an address against a saved file, follow the Python cloud CIDR matching guide. Its example parses AWS JSON; adapt the parser to this publisher's schema and preserve all matching records.
Sources
- [1]https://developers.cloudflare.com/api/resources/ips/methods/list/
- [2]https://api.cloudflare.com/client/v4/ips
- [3]https://stat.ripe.net/data/as-overview/data.json?resource=AS13335
- [4]https://stat.ripe.net/data/as-overview/data.json?resource=AS132892
- [5]https://stat.ripe.net/data/as-overview/data.json?resource=AS209242
- [6]https://stat.ripe.net/data/as-overview/data.json?resource=AS395747
A range file lists addresses the publisher attributes to its service. Matching an address against it shows only that the address falls inside a listed prefix; it does not identify the requester or the location of a device.