subnet.im

AS13335Cloudflare, Inc.

United StatesRegistryARINTypeContent

As of 13th October 2026, AS13335 (Cloudflare, Inc.), a content network registered in the United States with ARIN, originates 2,678 IPv4 prefixes covering 1.5M addresses and 3,041 IPv6 prefixes. By IPv4 address space that makes it the 349th-largest of the 79,585 networks we see originating IPv4, and the 82nd-largest of 18,443 in the United States. It is seen behind 215 upstream networks, most often AS3356 (Lumen (Level 3)) and AS2914 (NTT America, Inc.), and in front of 1,028 downstream networks. 95% of its announcements have a valid RPKI ROA; 5 are RPKI-invalid. 93% of its routes reach at least 90% of full-feed peers, and 7 prefixes are also originated by another network.

At a glance

IPv4 prefixes

2,678

IPv6 prefixes

3,041

IPv4 addresses

1.5M

IPv6 /64s

82.5B

Upstream graph

The networks AS13335 is seen behind, one and two hops out, drawn from real AS paths.

AS13335Toward the internet core
Upstream graph for AS13335: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS13335Cloudflare, Inc.This networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS6453TATA Communicatio…AS32590Valve CorporationAS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS38880Micron21 Datacent…AS49544i3D.net B.VAS3549Lumen (fka. Globa…AS8220COLTAS6939Hurricane Electri…

Networks observed one and two hops upstream of AS13335 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

2,971

adjacent networks

Upstreams
2157%
Peers
1,72858%
Downstreams
1,02835%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 215.

Upstreams of AS13335
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer49,350146
AS2914NTT America, Inc.USPeer38,654118
AS1299Arelion (fka. Telia Carrier)SEPeer36,649146
AS32590Valve CorporationUSPeer34,7758
AS6453TATA Communications (America) IncUSPeer32,430146
AS174Cogent Communications, LLCUSPeer31,737140
AS2497Internet Initiative Japan Inc.JPPeer26,8536
AS35280F5 Networks SARLFRPeer26,2966
AS3257GTT Communications Inc.USPeer23,258135
AS3491PCCW Global (HK) Ltd.HKPeer19,41218

Prefixes

All 5,719

The largest blocks AS13335 originates, widest first.

Largest prefixes originated by AS13335
PrefixAddressesVisibility
152.114.0.0/1732.8k81/81
150.48.128.0/1816.4k81/81
152.114.128.0/1816.4k81/81
204.195.192.0/1816.4k81/81
104.21.0.0/198.2k80/81
104.21.32.0/198.2k80/81
104.21.64.0/198.2k80/81
104.21.96.0/198.2k80/81
104.21.192.0/198.2k80/81
162.159.128.0/198.2k80/81

Routing health

How AS13335's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid95.1%5,436
  • Invalid<0.1%5
  • No ROA4.9%278

Propagation

  • Globally propagated90% of full-feed peers or more92.8%5,307
  • Partially propagated40% to 90%3.6%208
  • Seen by few peersUnder 40%3.6%204

Prefix sizes

IPv4 — 2,678 prefixes

IPv6 — 3,041 prefixes

  • /2934.4B × /64<0.1%1
  • /324.3B × /640.3%9
  • /341.1B × /640.3%8
  • /35537M × /64<0.1%1
  • /3867.1M × /64<0.1%1
  • /418.4M × /64<0.1%1
  • /441M × /641.2%35
  • /45524k × /640.4%11
  • /46262k × /642.5%76
  • /47131k × /64<0.1%3
  • /4865.5k × /6495.2%2,895

Recent changes

Announcements that started or stopped since 13th Sept 2026.

913 announced and 415 withdrawn in all; the most recent are shown.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.