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Autonomous System

AS3573 · Accenture LLP

Overview

AS3573 is announced on the Internet: RIPE RIS route collectors currently see 109 IPv4 prefixes and 355 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 39,680 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 96 upstream neighbours (transit providers or peers) and 2 downstream neighbours (customers or networks it carries). Its most visible upstreams are Vocus Connect International Backbone (AS4826), COLT Technology Services Group Limited (AS8220), and Fastweb SpA (AS12874). AS3573 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 8:57 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 63.240.184.1

The trace goes to 63.240.184.1, the first address of 63.240.184.0/21. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (109 prefixes)

PrefixAddresses
63.240.184.0/212,048
131.226.237.0/24256
144.36.1.0/24256
144.36.61.0/24256
144.36.62.0/24256
144.36.146.0/24256
144.36.172.0/24256
144.36.216.0/23512
144.36.216.0/24256
170.248.4.0/24256
170.248.23.0/24256
170.248.24.0/212,048
170.248.28.0/221,024
170.248.32.0/221,024
170.248.34.0/23512
170.248.36.0/24256
170.248.39.0/24256
170.248.40.0/24256
170.248.45.0/24256
170.248.56.0/212,048
170.248.60.0/221,024
170.248.64.0/221,024
170.248.66.0/23512
170.248.68.0/221,024
170.248.68.0/23512
170.248.70.0/23512
170.248.72.0/221,024
170.248.72.0/23512
170.248.74.0/23512
170.248.80.0/24256
170.248.82.0/24256
170.248.89.0/24256
170.248.104.0/212,048
170.248.104.0/221,024
170.248.108.0/221,024
170.248.112.0/212,048
170.248.112.0/221,024
170.248.116.0/221,024
170.248.144.0/24256
170.248.212.0/24256
170.248.227.0/24256
170.251.94.0/24256
170.251.95.0/24256
170.251.98.0/23512
170.251.98.0/24256
170.251.99.0/24256
170.251.128.0/24256
170.251.129.0/24256
170.251.131.0/24256
170.251.132.0/24256
170.251.133.0/24256
170.251.134.0/24256
170.251.138.0/23512
170.251.138.0/24256
170.251.139.0/24256
170.251.180.0/23512
170.251.180.0/24256
170.251.181.0/24256
170.251.182.0/23512
170.251.182.0/24256
170.251.192.0/23512
170.251.193.0/24256
170.251.196.0/23512
170.251.197.0/24256
170.251.204.0/23512
170.251.204.0/24256
170.251.205.0/24256
170.251.208.0/23512
170.251.208.0/24256
170.251.209.0/24256
170.251.210.0/24256
170.251.229.0/24256
170.252.16.0/221,024
170.252.32.0/24256
170.252.33.0/24256
170.252.34.0/24256
170.252.35.0/24256
170.252.36.0/24256
170.252.37.0/24256
170.252.38.0/24256
170.252.39.0/24256
170.252.42.0/24256
170.252.43.0/24256
170.252.44.0/24256
170.252.45.0/24256
170.252.46.0/24256
170.252.47.0/24256
170.252.60.0/24256
170.252.80.0/212,048
170.252.80.0/24256
170.252.121.0/24256
170.252.122.0/24256
170.252.123.0/24256
170.252.125.0/24256
170.252.126.0/24256
170.252.127.0/24256
170.252.136.0/24256
170.252.144.0/23512
170.252.146.0/24256
170.252.147.0/24256

Showing the first 100 of 109, in address order. Complete list on RIPEstat

IPv6 prefixes (355 prefixes)

Prefix
2404:3d00::/32
2404:3d00::/33
2404:3d00:300::/40
2404:3d00:2010::/44
2404:3d00:4050::/47
2404:3d00:406c::/47
2404:3d00:406c::/48
2404:3d00:406e::/47
2404:3d00:406e::/48
2404:3d00:4072::/47
2404:3d00:4074::/47
2404:3d00:4076::/47
2404:3d00:4076::/48
2404:3d00:408e::/47
2404:3d00:4092::/47
2404:3d00:4096::/47
2404:3d00:40a6::/47
2404:3d00:40aa::/47
2404:3d00:4110::/48
2404:3d00:4116::/47
2404:3d00:4116::/48
2404:3d00:4122::/47
2404:3d00:4172::/47
2404:3d00:419c::/47
2404:3d00:419c::/48
2404:3d00:41a6::/47
2404:3d00:41a6::/48
2404:3d00:41a8::/47
2404:3d00:41b6::/47
2404:3d00:41b6::/48
2404:3d00:41b8::/47
2404:3d00:41da::/47
2404:3d00:8000::/33
2610:b0::/32
2610:b0::/33
2610:b0:300::/40
2610:b0:400::/40
2610:b0:2020::/44
2610:b0:2060::/44
2610:b0:4006::/47
2610:b0:4006::/48
2610:b0:4007::/48
2610:b0:400e::/47
2610:b0:400e::/48
2610:b0:400f::/48
2610:b0:4032::/47
2610:b0:4032::/48
2610:b0:4033::/48
2610:b0:403a::/47
2610:b0:403a::/48
2610:b0:403b::/48
2610:b0:4070::/47
2610:b0:4082::/47
2610:b0:4082::/48
2610:b0:4083::/48
2610:b0:4084::/48
2610:b0:4085::/48
2610:b0:4086::/47
2610:b0:4086::/48
2610:b0:4087::/48
2610:b0:408a::/47
2610:b0:408a::/48
2610:b0:408b::/48
2610:b0:408e::/48
2610:b0:408f::/48
2610:b0:4098::/47
2610:b0:4098::/48
2610:b0:4099::/48
2610:b0:40a0::/48
2610:b0:40a1::/48
2610:b0:40a8::/47
2610:b0:40aa::/47
2610:b0:40aa::/48
2610:b0:40ab::/48
2610:b0:40b0::/48
2610:b0:40b2::/48
2610:b0:40b3::/48
2610:b0:40b8::/47
2610:b0:40b8::/48
2610:b0:40b9::/48
2610:b0:40ba::/47
2610:b0:40ba::/48
2610:b0:40bb::/48
2610:b0:40c0::/47
2610:b0:40c0::/48
2610:b0:40c1::/48
2610:b0:40c8::/47
2610:b0:40c8::/48
2610:b0:40c9::/48
2610:b0:40ca::/47
2610:b0:40ca::/48
2610:b0:40cb::/48
2610:b0:40ce::/47
2610:b0:40ce::/48
2610:b0:40cf::/48
2610:b0:40d0::/48
2610:b0:40d1::/48
2610:b0:40dc::/48
2610:b0:40dd::/48
2610:b0:40ec::/47

Showing the first 100 of 355, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (96)

ASNetworkVisibility
AS4826Vocus Connect International Backbone893
AS8220COLT Technology Services Group Limited891
AS12874Fastweb SpA857
AS1221Telstra Limited676
AS12357VODAFONE ESPANA S.A.U.572
AS262197MILLICOM CABLE COSTA RICA S.A.556
AS4657StarHub Ltd531
AS45458SBN-ISP/AWN-ISP and SBN-NIX/AWN-NIX530
AS702Verizon Business524
AS9790Two Degrees Networks Limited518
AS9381HKBN Enterprise Solutions HK Limited487
AS2516KDDI CORPORATION462
AS9498BHARTI Airtel Ltd.460
AS3269Telecom Italia S.p.A.454
AS30844Liquid Telecommunications Ltd451
AS701Verizon Business450
AS7474SingTel Optus Pty Ltd435
AS4637Telstra Global433
AS7018AT&T Enterprises, LLC427
AS262202-424
AS13237euNetworks GmbH412
AS4755TATA Communications formerly VSNL is Leading ISP393
AS3320Deutsche Telekom AG387
AS12552-379
AS7303Telecom Argentina S.A.376
AS3356Level 3 Parent, LLC368
AS28716-349
AS8218Zayo Infrastructure France SA346
AS2687-341
AS4049CELLO GROUP LIMITED336

The 30 most visible of 96.

Downstreams (customers) (2)

ASNetworkVisibility
AS8220COLT Technology Services Group Limited59
AS64901-2

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.