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Autonomous System

AS20011 · Dimension Data

Overview

AS20011 is announced on the Internet: RIPE RIS route collectors currently see 1,124 IPv4 prefixes and 3 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 818,176 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 10 upstream neighbours (transit providers or peers) and 4 downstream neighbours (customers or networks it carries). Its most visible upstreams are Dimension Data (AS3741), Hurricane Electric LLC (AS6939), and Angola Cables (AS37468). AS20011 was assigned by ARIN, and its registration country is South Africa.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 10:59 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 152.110.0.1, the first address of 152.110.0.0/16. 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 (1,124 prefixes)

PrefixAddresses
41.132.0.0/1816,384
41.132.0.0/198,192
41.132.44.0/221,024
41.132.48.0/204,096
41.132.64.0/212,048
41.132.64.0/221,024
41.132.66.0/23512
41.132.68.0/221,024
41.132.68.0/23512
41.132.72.0/221,024
41.132.78.0/23512
41.133.64.0/23512
41.133.66.0/23512
41.133.68.0/23512
41.133.70.0/23512
41.133.72.0/23512
41.133.74.0/23512
41.133.76.0/23512
41.133.78.0/23512
41.133.80.0/23512
41.133.82.0/23512
41.133.84.0/23512
41.133.86.0/23512
41.133.88.0/23512
41.133.90.0/23512
41.133.92.0/23512
41.133.94.0/23512
41.133.96.0/23512
41.133.98.0/23512
41.133.100.0/23512
41.133.102.0/23512
41.133.112.0/23512
41.133.114.0/23512
41.133.116.0/23512
41.133.122.0/23512
41.133.142.0/23512
41.133.192.0/1816,384
41.134.49.0/24256
41.134.63.0/24256
41.134.105.0/24256
41.134.140.0/24256
41.134.220.0/24256
41.134.230.0/24256
41.135.0.0/1816,384
41.135.0.0/198,192
41.135.0.0/204,096
41.135.16.0/204,096
41.135.32.0/198,192
41.135.32.0/204,096
41.135.48.0/204,096
41.135.64.0/198,192
41.135.64.0/204,096
41.135.115.0/24256
41.135.120.0/24256
41.135.121.0/24256
41.135.122.0/24256
41.135.192.0/198,192
41.135.192.0/204,096
41.135.208.0/204,096
41.135.208.0/212,048
152.110.0.0/1665,536
152.110.0.0/1732,768
152.110.0.0/1816,384
152.110.64.0/1816,384
152.110.128.0/1732,768
152.110.128.0/1816,384
152.110.192.0/1816,384
168.210.0.0/23512
168.210.3.0/24256
168.210.4.0/221,024
168.210.8.0/221,024
168.210.12.0/221,024
168.210.20.0/221,024
168.210.26.0/23512
168.210.28.0/221,024
168.210.32.0/212,048
168.210.40.0/24256
168.210.42.0/23512
168.210.44.0/221,024
168.210.48.0/204,096
168.210.64.0/204,096
168.210.82.0/23512
168.210.84.0/221,024
168.210.88.0/212,048
168.210.96.0/221,024
168.210.101.0/24256
168.210.102.0/23512
168.210.103.0/24256
168.210.104.0/212,048
168.210.113.0/24256
168.210.115.0/24256
168.210.116.0/221,024
168.210.120.0/212,048
168.210.128.0/1816,384
168.210.128.0/204,096
168.210.144.0/24256
168.210.145.0/24256
168.210.146.0/24256
168.210.147.0/24256
168.210.148.0/24256

Showing the first 100 of 1,124, in address order. Complete list on RIPEstat

IPv6 prefixes (3 prefixes)

Prefix
2001:4308::/32
2001:4308:5200::/44
2001:4308:5300::/44

Neighbours

Upstreams (transit or peers) (10)

ASNetworkVisibility
AS3741Dimension Data2,105
AS6939Hurricane Electric LLC109
AS37468Angola Cables18
AS39120Convergenze S.p.A.5
AS37497Network Platforms (PTY) LTD4
AS37100SEACOM Limited2
AS327782Metro Fibre Networx (Pty) Ltd2
AS5713Telkom SA Ltd.1
AS30844Liquid Telecommunications Ltd1
AS36874Cybersmart1

Downstreams (customers) (4)

ASNetworkVisibility
AS328453Web Africa Networks (Pty) Ltd576
AS328467Suretel CC268
AS5713Telkom SA Ltd.10
AS64516-2

15 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

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.