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Autonomous System

AS3491 · PCCW Global (HK) Ltd.

Overview

AS3491 is announced on the Internet: RIPE RIS route collectors currently see 514 IPv4 prefixes and 44 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 1,378,560 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 84 upstream neighbours (transit providers or peers) and 679 downstream neighbours (customers or networks it carries). Its most visible upstreams are Aperture Science Limited (AS38008), Cogent Communications, LLC (AS174), and Arelion Sweden AB (AS1299). AS3491 was assigned by ARIN, and its registration country is Hong Kong SAR China.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 6:46 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 63.216.0.1

The trace goes to 63.216.0.1, the first address of 63.216.0.0/13. 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 (514 prefixes)

PrefixAddresses
31.59.78.0/24256
41.79.244.0/221,024
41.79.245.0/24256
41.79.248.0/221,024
41.79.248.0/24256
41.79.249.0/24256
41.79.250.0/24256
41.221.208.0/204,096
41.221.208.0/24256
41.221.216.0/221,024
41.221.216.0/24256
41.221.217.0/24256
43.230.86.0/23512
45.195.74.0/24256
49.128.209.0/24256
49.128.212.0/24256
61.13.144.0/204,096
61.16.36.0/221,024
63.216.0.0/13524,288
63.216.14.0/24256
63.216.35.0/24256
63.216.48.0/212,048
63.216.56.0/212,048
63.216.82.0/23512
63.216.140.0/24256
63.216.142.0/23512
63.216.144.0/221,024
63.216.149.0/24256
63.216.150.0/24256
63.216.151.0/24256
63.216.152.0/221,024
63.216.156.0/24256
63.216.164.0/221,024
63.216.168.0/212,048
63.216.170.0/24256
63.216.176.0/24256
63.216.192.0/212,048
63.216.193.0/24256
63.216.240.0/24256
63.216.242.0/24256
63.217.16.0/23512
63.217.20.0/221,024
63.217.24.0/23512
63.217.40.0/212,048
63.217.48.0/221,024
63.217.59.0/24256
63.217.60.0/221,024
63.217.66.0/24256
63.217.70.0/24256
63.217.71.0/24256
63.217.72.0/221,024
63.217.80.0/212,048
63.217.81.0/24256
63.217.87.0/24256
63.217.88.0/212,048
63.217.96.0/221,024
63.217.103.0/24256
63.217.112.0/212,048
63.217.120.0/221,024
63.217.168.0/221,024
63.217.168.0/24256
63.217.208.0/221,024
63.217.237.0/24256
63.217.248.0/221,024
63.217.254.0/24256
63.218.0.0/221,024
63.218.4.0/23512
63.218.6.0/23512
63.218.8.0/24256
63.218.10.0/23512
63.218.12.0/23512
63.218.14.0/23512
63.218.17.0/24256
63.218.18.0/23512
63.218.22.0/23512
63.218.26.0/23512
63.218.34.0/23512
63.218.36.0/221,024
63.218.40.0/23512
63.218.43.0/24256
63.218.44.0/221,024
63.218.48.0/23512
63.218.52.0/221,024
63.218.56.0/23512
63.218.58.0/24256
63.218.60.0/221,024
63.218.63.0/24256
63.218.66.0/24256
63.218.68.0/221,024
63.218.72.0/23512
63.218.76.0/23512
63.218.78.0/23512
63.218.80.0/23512
63.218.82.0/23512
63.218.92.0/221,024
63.218.100.0/23512
63.218.106.0/24256
63.218.107.0/24256
63.218.112.0/23512
63.218.114.0/23512

Showing the first 100 of 514, in address order. Complete list on RIPEstat

IPv6 prefixes (44 prefixes)

Prefix
2400:8800::/32
2400:8800::/35
2400:8800:1::/48
2400:8800:101::/48
2400:8800:102::/48
2400:8800:1000::/37
2400:8800:1001::/48
2400:8800:2000::/35
2400:8800:4000::/35
2400:8800:4201::/48
2400:8800:6000::/35
2400:8800:8000::/35
2400:8800:a000::/35
2400:8800:c000::/35
2400:8800:e000::/35
2400:8800:f805::/48
2400:8800:f806::/48
2400:8800:f807::/48
2400:8800:f80a::/48
2400:8800:f80d::/48
2400:8800:f80f::/48
2400:8800:f810::/48
2400:8800:f811::/48
2400:8800:f81b::/48
2400:8800:f81f::/48
2400:8800:f821::/48
2400:8800:f822::/48
2400:8800:f823::/48
2400:8800:f828::/48
2400:8800:f8f0::/48
2400:8800:f8f1::/48
2400:8800:f8fa::/48
2400:8800:fc03::/48
2400:8800:fc05::/48
2400:8800:fc07::/48
2400:8800:fc08::/48
2400:8800:fc09::/48
2400:8800:fc0b::/48
2400:8800:fc0e::/48
2400:8800:fc0f::/48
2400:8800:fc10::/48
2606:9dc0:fc00::/48
2c0f:f3c0::/32
2c0f:f3d0::/32

Neighbours

Upstreams (transit or peers) (84)

ASNetworkVisibility
AS38008Aperture Science Limited146,505
AS174Cogent Communications, LLC89,585
AS1299Arelion Sweden AB85,872
AS3356Level 3 Parent, LLC73,256
AS2914NTT America, Inc.49,786
AS6939Hurricane Electric LLC45,331
AS37497Network Platforms (PTY) LTD36,856
AS3257GTT Communications Inc.32,040
AS6762TELECOM ITALIA SPARKLE S.p.A.26,523
AS13030Init7 (Switzerland) Ltd.25,900
AS20764CJSC RASCOM21,609
AS6461Zayo Bandwidth21,507
AS3320Deutsche Telekom AG19,852
AS9002RETN Limited19,019
AS6453TATA COMMUNICATIONS (AMERICA) INC17,622
AS12956TELEFONICA GLOBAL SOLUTIONS SL14,770
AS577Bell Canada10,720
AS60068Datacamp Limited9,924
AS20485Joint Stock Company TransTeleCom8,499
AS3741Dimension Data8,392
AS5511Opentransit Orange S.A.7,773
AS22356Durand do Brasil Ltda7,244
AS7575Australian Academic and Research Network (AARNet)5,981
AS3303Swisscom (Schweiz) AG5,959
AS5405Inter.link GmbH5,787
AS6830LibertyGlobal Liberty Global Europe Holding B.V.5,769
AS2497Internet Initiative Japan Inc.5,012
AS9498BHARTI Airtel Ltd.4,837
AS12389PJSC Rostelecom4,628
AS1273IDDQD-AS3,925

The 30 most visible of 84.

Downstreams (customers) (679)

ASNetworkVisibility
AS3356Level 3 Parent, LLC50,398
AS174Cogent Communications, LLC44,424
AS20473The Constant Company, LLC33,999
AS22356Durand do Brasil Ltda32,426
AS1299Arelion Sweden AB31,776
AS3257GTT Communications Inc.31,665
AS7552Viettel Group27,632
AS2914NTT America, Inc.26,796
AS6453TATA COMMUNICATIONS (AMERICA) INC25,672
AS12389PJSC Rostelecom21,583
AS6762TELECOM ITALIA SPARKLE S.p.A.18,940
AS9498BHARTI Airtel Ltd.17,521
AS6461Zayo Bandwidth17,108
AS6939Hurricane Electric LLC15,696
AS20764CJSC RASCOM13,276
AS12956TELEFONICA GLOBAL SOLUTIONS SL13,080
AS23911China Next Generation Internet Beijing IX12,827
AS49666Telecommunication Infrastructure Company12,145
AS9924Taiwan Fixed Network, Telco and Network Service Provider.10,709
AS45903CMC Telecom Infrastructure Company10,290
AS3758SingNet9,772
AS60068Datacamp Limited9,166
AS20485Joint Stock Company TransTeleCom8,773
AS4515-8,413
AS264409Huge Solucoes Corporativas Ltda7,514
AS8220COLT Technology Services Group Limited7,452
AS1273IDDQD-AS7,234
AS4780-7,224
AS9002RETN Limited6,603
AS10111Zeofast Network6,532

The 30 most visible of 679.

608 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.