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6 dimensions · leaks / fingerprint / consistency

ASN lookup result for AS13335 Cloudflare, Inc. — network size, BGP routing and registration

USAS13335Cloudflare, Inc.CDN
WHOIS Topology

United States · ARINcloudflare.com

Hosts top sitesAnycastCDNDDoS mitigationCritical infrastructureRPKI filteringVPN services

IPv4 addresses

1,457,152

2,698 announced prefixes

IPv6 addresses

1.52 × 10³⁰

3,084 announced prefixes

BGP neighbours

…

CAIDA rank

#62

Customer cone 1,033 ASNs

Estimated users

17M

APNIC: 17.2M

RPKI

95% valid

6 invalid · 281 not covered

Average purity

70

14,950 sampled IPs

IXPs / facilities

357 / 224

Operator self-reported

History

How prefixes were announced and changed hands, registration changes, and outage or hijack incidents.

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IP ranges

Currently announced prefixes with their RIR registration and geolocation.

PrefixRPKIRegistrationGeolocationAddresses
152.114.0.0/17Not foundGBLowerRIPEGBUnited Kingdom32,768
150.48.128.0/18ValidSTUB-150-48-128SLASH18APNICUSUnited States16,384
152.114.128.0/18Not foundGBNPSHOLDINGSRIPEGBUnited Kingdom16,384
204.195.192.0/18Valid—USUnited States16,384
104.21.0.0/19Valid——8,192
104.21.32.0/19Valid——8,192
104.21.64.0/19Valid——8,192
104.21.96.0/19Valid——8,192
104.21.192.0/19Valid——8,192
162.159.128.0/19Valid—USUnited States8,192
172.65.0.0/19Valid——8,192
172.65.32.0/19Valid——8,192
16.5.144.0/20Valid—USUnited States4,096
90.96.176.0/20ValidUSNET-90-96-176-0-20RIPEUSUnited States4,096
104.16.0.0/20Valid——4,096
104.16.16.0/20Valid——4,096
104.16.32.0/20Valid——4,096
104.16.48.0/20Valid——4,096
104.16.64.0/20Valid——4,096
104.16.80.0/20Valid——4,096

Only the first 500 prefixes are listed; address counts and geography use all prefixes.

/24 block profile

One square per /24: colour shows the risk type, shade how many addresses are flagged, stripes mark datacenter blocks. Click a square to see all 256 addresses.

/24s with data 2,210 / 5,692 （39%） · flagged 1,480

No risk flagsDatacenter (no flags)ProxyVPNAbuse / blocklistTorDarker = more flagged addresses; dashed = block screen only

104.21.64.0/1931/32 with data · 13 flagged

104.21.0.0/1928/32 with data · 12 flagged

104.21.32.0/1928/32 with data · 13 flagged

162.159.128.0/1928/32 with data · 13 flagged

104.18.0.0/2016/16 with data · 15 flagged

104.18.32.0/2016/16 with data · 14 flagged

104.26.0.0/2016/16 with data · 14 flagged

162.159.0.0/2016/16 with data · 4 flagged

172.67.64.0/2016/16 with data · 12 flagged

172.67.160.0/2016/16 with data · 6 flagged

104.17.128.0/2015/16 with data · 1 flagged

104.17.144.0/2015/16 with data · 5 flagged

Hover a square for its numbers; click to see all 256 addresses.

Each prefix shows its 64 /24s with the most data. Built daily from lookups, neighbour sampling, public lists and block screening.

IP reputation

IPs from this network that CleanIP has analysed: purity, abuse reports and the riskiest /24 blocks.

Purity distribution

85–100 670–84 10,96750–69 3,3640–49 613

0.57%

Share of IPv4 reported or blocklisted

8,071

Listed IPs

14,950

Analysed IPs

Flagged = VPN, proxy, Tor or purity below 50. Samples come from user lookups and neighbour sampling, not every address in this network.

Geography

Where this network’s IPv4 addresses are located.

  • US United States
  • GB United Kingdom
  • DE Germany
  • SG Singapore
  • IN India
  • BR Brazil
Scope
Global
In registered country
36.6%

Estimated by sampling IPv4 ranges against a geolocation database.

Datacenter Presence

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BGP upstreams and neighbours

AS13335Standalone page
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WHOIS record

The registry’s record for this AS number: holder, status, dates and contacts.

Sources

Where the information on this page comes from and when it was updated.

InformationSourceUpdated
Registered countryRIR daily delegation statistics2026-10-20
Registered address & allocation dateRIR registration data (RDAP)2026-09-26
Organization & company countryAS-to-organization data2026-10-21
Network typeCleanIP ASN canon2026-10-21
Exchanges & facilitiesOperator self-reported interconnection data2026-10-21
Announced prefixes & BGP neighboursPublic BGP routing data2026-10-21
IPv4 geographyGeolocation database—
RPKI validationRPKI ROA validation data2026-10-21
Rank & customer coneCAIDA AS Rank2026-10-01
Estimated users (APNIC)APNIC Labs user estimates2026-10-19
Network tagsPublic routing data community tags2026-10-21
IP reputationCleanIP lookups and neighbour sampling—

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Multi-source cross-checks · In-house reputation data · Real data only

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