subnet.im

AS13335Cloudflare, Inc.

United StatesRegistryARINTypeContent

As of 26th September 2026, AS13335 (Cloudflare, Inc.), a content network registered in the United States with ARIN, originates 2,423 IPv4 prefixes covering 1.5M addresses and 2,971 IPv6 prefixes. By IPv4 address space that makes it the 360th-largest of the 79,480 networks we see originating IPv4, and the 85th-largest of 18,421 in the United States. It is seen behind 220 upstream networks, most often AS2914 (NTT America, Inc.) and AS3356 (Lumen (Level 3)), and in front of 1,022 downstream networks. 98% of its announcements have a valid RPKI ROA; 6 are RPKI-invalid. 92% of its routes reach at least 90% of full-feed peers, and 3 prefixes are also originated by another network.

At a glance

IPv4 prefixes

2,423

IPv6 prefixes

2,971

IPv4 addresses

1.5M

IPv6 /64s

82.7B

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…AS3130RGnet OUAS49544i3D.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

2,960

adjacent networks

Upstreams
2207%
Peers
1,71858%
Downstreams
1,02235%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 220.

Upstreams of AS13335
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer45,434119
AS3356Lumen (Level 3)USPeer40,548145
AS32590Valve CorporationUSPeer34,2328
AS1299Arelion (fka. Telia Carrier)SEPeer32,360145
AS6453TATA Communications (America) IncUSPeer32,005145
AS3257GTT Communications Inc.USPeer30,457135
AS2497Internet Initiative Japan Inc.JPPeer26,3456
AS35280F5 Networks SARLFRPeer25,8936
AS174Cogent Communications, LLCUSPeer25,753139
AS3491PCCW Global (HK) Ltd.HKPeer19,14518

Prefixes

All 5,394

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

  • Valid97.5%5,261
  • Invalid0.1%6
  • No ROA2.4%127

Propagation

  • Globally propagated90% of full-feed peers or more92.3%4,980
  • Partially propagated40% to 90%3.7%202
  • Seen by few peersUnder 40%3.9%212

Prefix sizes

IPv4 — 2,423 prefixes

IPv6 — 2,971 prefixes

  • /2934.4B × /64<0.1%1
  • /324.3B × /640.3%9
  • /341.1B × /640.3%8
  • /35537M × /64<0.1%1
  • /36268M × /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 × /642.6%76
  • /47131k × /640.1%3
  • /4865.5k × /6495.1%2,824

Recent changes

Announcements that started or stopped since 27th Aug 2026.

396 announced and 223 withdrawn in all; the most recent are shown.

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