subnet.im

AS54113Fastly, Inc.

United StatesRegistryARINTypeContent

As of 26th September 2026, AS54113 (Fastly, Inc.), a content network registered in the United States with ARIN, originates 606 IPv4 prefixes covering 630k addresses and 1,212 IPv6 prefixes. By IPv4 address space that makes it the 620th-largest of the 79,480 networks we see originating IPv4, and the 148th-largest of 18,421 in the United States. It is seen behind 135 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 1 downstream network. Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 93% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

606

IPv6 prefixes

1,212

IPv4 addresses

630k

IPv6 /64s

12.3B

Upstream graph

The networks AS54113 is seen behind, one and two hops out, drawn from real AS paths.

AS54113Toward the internet core
Upstream graph for AS54113: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS54113Fastly, Inc.This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS9002RETN LimitedAS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS3549Lumen (fka. Globa…AS51907Kanton Zug

Networks observed one and two hops upstream of AS54113 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

664

adjacent networks

Upstreams
13520%
Peers
52880%
Downstreams
10%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 135.

Upstreams of AS54113
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer22,644145
AS2914NTT America, Inc.USPeer13,651145
AS174Cogent Communications, LLCUSPeer11,995139
AS3356Lumen (Level 3)USPeer11,542145
AS9002RETN LimitedGBPeer8,168145
AS55836Reliance Jio Infocomm LimitedINPeer7,960143
AS4637Telstra International LimitedHKPeer4,726144
AS6939Hurricane Electric LLCUSPeer3,92938
AS3257GTT Communications Inc.USPeer3,320145
AS7195EdgeUnoCOPeer2,37899

Prefixes

All 1,818

The largest blocks AS54113 originates, widest first.

Largest prefixes originated by AS54113
PrefixAddressesVisibility
151.101.0.0/1665.5k81/81
199.232.0.0/1665.5k81/81
146.75.0.0/1732.8k81/81
146.75.128.0/1732.8k81/81
167.82.0.0/1732.8k81/81
140.248.0.0/1816.4k81/81
140.248.128.0/1816.4k81/81
140.248.192.0/1816.4k81/81
172.111.64.0/1816.4k81/81
87.81.224.0/198.2k81/81

Routing health

How AS54113'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

  • Valid99.9%1,816
  • Invalid0.0%0
  • No ROA0.1%2

Propagation

  • Globally propagated90% of full-feed peers or more93.0%1,691
  • Partially propagated40% to 90%3.3%60
  • Seen by few peersUnder 40%3.7%67

Prefix sizes

IPv4 — 606 prefixes

IPv6 — 1,212 prefixes

  • /324.3B × /64<0.1%1
  • /341.1B × /640.2%2
  • /36268M × /641.2%14
  • /3933.6M × /643.9%47
  • /4016.8M × /641.2%14
  • /432.1M × /641.8%22
  • /441M × /6418.0%218
  • /46262k × /640.2%3
  • /4865.5k × /6473.5%891

Recent changes

Announcements that started or stopped since 27th Aug 2026.

62 announced and 51 withdrawn in all; the most recent are shown.

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