subnet.im

AS54113Fastly, Inc.

United StatesRegistryARINTypeContent

As of 11th November 2026, AS54113 (Fastly, Inc.), a content network registered in the United States with ARIN, originates 611 IPv4 prefixes covering 654k addresses and 1,202 IPv6 prefixes. By IPv4 address space that makes it the 616th-largest of the 80,763 networks we see originating IPv4, and the 150th-largest of 18,758 in the United States. It is seen behind 136 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. 91% of its routes reach at least 90% of full-feed peers, and 10 prefixes are also originated by another network.

At a glance

IPv4 prefixes

611

IPv6 prefixes

1,202

IPv4 addresses

654k

IPv6 /64s

12.4B

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…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS3549Lumen (fka. Globa…AS6667Elisa Oyj

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

649

adjacent networks

Upstreams
13621%
Peers
51279%
Downstreams
10%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 136.

Upstreams of AS54113
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer22,604140
AS2914NTT America, Inc.USPeer13,478139
AS174Cogent Communications, LLCUSPeer12,023134
AS3356Lumen (Level 3)USPeer11,618139
AS9002RETN LimitedGBPeer7,941140
AS55836Reliance Jio Infocomm LimitedINPeer7,756138
AS4637Telstra International LimitedHKPeer3,876140
AS6939Hurricane Electric LLCUSPeer3,73436
AS3257GTT Communications Inc.USPeer3,388139
AS7922Comcast Cable Communications, LLCUSPeer2,159139

Prefixes

All 1,813

The largest blocks AS54113 originates, widest first.

Largest prefixes originated by AS54113
PrefixAddressesVisibility
151.101.0.0/1665.5k77/77
199.232.0.0/1665.5k77/77
146.75.0.0/1732.8k77/77
146.75.128.0/1732.8k77/77
167.82.0.0/1732.8k77/77
90.98.0.0/1816.4k77/77
140.248.0.0/1816.4k77/77
140.248.128.0/1816.4k77/77
140.248.192.0/1816.4k77/77
172.111.64.0/1816.4k77/77

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

  • Valid99.8%1,810
  • Invalid0.0%0
  • No ROA0.2%3

Propagation

  • Globally propagated90% of full-feed peers or more91.5%1,658
  • Partially propagated40% to 90%2.6%47
  • Seen by few peersUnder 40%6.0%108

Prefix sizes

IPv4 — 611 prefixes

IPv6 — 1,202 prefixes

  • /324.3B × /64<0.1%1
  • /341.1B × /640.2%2
  • /36268M × /641.2%14
  • /3933.6M × /644.0%48
  • /4016.8M × /641.2%15
  • /432.1M × /641.8%22
  • /441M × /6417.6%211
  • /46262k × /640.2%3
  • /4865.5k × /6473.7%886

Recent changes

Announcements that started or stopped since 12th Oct 2026.

72 announced and 61 withdrawn in all; the most recent are shown.

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