subnet.im

AS13335Cloudflare, Inc.

United StatesRegistryARINTypeContent

As of 10th November 2026, AS13335 (Cloudflare, Inc.), a content network registered in the United States with ARIN, originates 2,733 IPv4 prefixes covering 1.6M addresses and 3,069 IPv6 prefixes. By IPv4 address space that makes it the 349th-largest of the 80,723 networks we see originating IPv4, and the 80th-largest of 18,750 in the United States. It is seen behind 208 upstream networks, most often AS3356 (Lumen (Level 3)) and AS2914 (NTT America, Inc.), and in front of 1,058 downstream networks. 95% of its announcements have a valid RPKI ROA; 29 are RPKI-invalid. 91% of its routes reach at least 90% of full-feed peers, and 13 prefixes are also originated by another network.

At a glance

IPv4 prefixes

2,733

IPv6 prefixes

3,069

IPv4 addresses

1.6M

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 CorporationAS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS3549Lumen (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

3,018

adjacent networks

Upstreams
2087%
Peers
1,75258%
Downstreams
1,05835%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 208.

Upstreams of AS13335
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer47,427139
AS2914NTT America, Inc.USPeer40,003117
AS32590Valve CorporationUSPeer35,2858
AS1299Arelion (fka. Telia Carrier)SEPeer33,668139
AS6453TATA Communications (America) IncUSPeer32,106139
AS174Cogent Communications, LLCUSPeer29,953133
AS2497Internet Initiative Japan Inc.JPPeer27,2106
AS35280F5 Networks SARLFRPeer26,7606
AS3257GTT Communications Inc.USPeer21,395130
AS3491PCCW Global (HK) Ltd.HKPeer19,67214

Prefixes

All 5,802

The largest blocks AS13335 originates, widest first.

Largest prefixes originated by AS13335
PrefixAddressesVisibility
152.114.0.0/1732.8k76/76
150.48.128.0/1816.4k76/76
152.114.128.0/1816.4k76/76
204.195.192.0/1816.4k76/76
69.195.160.0/198.2k76/76
104.18.32.0/198.2k1/76
104.21.0.0/198.2k75/76
104.21.32.0/198.2k75/76
104.21.64.0/198.2k75/76
104.21.96.0/198.2k75/76

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

  • Valid94.6%5,490
  • Invalid0.5%29
  • No ROA4.9%283

Propagation

  • Globally propagated90% of full-feed peers or more91.3%5,297
  • Partially propagated40% to 90%3.7%214
  • Seen by few peersUnder 40%5.0%291

Prefix sizes

IPv4 — 2,733 prefixes

IPv6 — 3,069 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 × /641.0%32
  • /45524k × /640.4%11
  • /46262k × /642.5%76
  • /47131k × /64<0.1%3
  • /4865.5k × /6495.3%2,925

Recent changes

Announcements that started or stopped since 11th Oct 2026.

1,073 announced and 912 withdrawn in all; the most recent are shown.

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