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Autonomous System

AS45102 · Alibaba (US) Technology Co., Ltd.

Overview

AS45102 is announced on the Internet: RIPE RIS route collectors currently see 1,166 IPv4 prefixes and 136 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 5,624,832 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 104 upstream neighbours (transit providers or peers) and 1 downstream neighbour (customers or networks it carries). Its most visible upstreams are Zenlayer Inc (AS21859), TATA COMMUNICATIONS (AMERICA) INC (AS6453), and Singapore Telecommunications Ltd (AS7473). AS45102 was assigned by APNIC, and its registration country is China.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 6:47 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 43.100.0.1

The trace goes to 43.100.0.1, the first address of 43.100.0.0/15. 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 (1,166 prefixes)

PrefixAddresses
5.181.224.0/23512
8.208.0.0/1665,536
8.208.0.0/1732,768
8.208.0.0/1816,384
8.208.0.0/198,192
8.208.32.0/198,192
8.208.128.0/1732,768
8.208.141.0/24256
8.209.0.0/198,192
8.209.0.0/204,096
8.209.16.0/204,096
8.209.36.0/23512
8.209.36.0/24256
8.209.37.0/24256
8.209.38.0/23512
8.209.38.0/24256
8.209.39.0/24256
8.209.40.0/221,024
8.209.40.0/23512
8.209.42.0/23512
8.209.44.0/221,024
8.209.44.0/23512
8.209.46.0/23512
8.209.48.0/204,096
8.209.48.0/212,048
8.209.56.0/212,048
8.209.64.0/1816,384
8.209.64.0/198,192
8.209.96.0/198,192
8.209.128.0/1816,384
8.209.128.0/198,192
8.209.160.0/198,192
8.209.192.0/1816,384
8.209.192.0/198,192
8.209.224.0/198,192
8.210.0.0/1665,536
8.210.0.0/1732,768
8.210.128.0/1732,768
8.210.240.0/24256
8.211.0.0/1732,768
8.211.0.0/1816,384
8.211.64.0/1816,384
8.211.80.0/212,048
8.211.88.0/212,048
8.211.96.0/212,048
8.211.104.0/212,048
8.211.128.0/1816,384
8.211.128.0/198,192
8.211.160.0/198,192
8.211.192.0/1816,384
8.211.192.0/198,192
8.211.224.0/198,192
8.211.226.0/24256
8.212.0.0/1732,768
8.212.0.0/1816,384
8.212.64.0/1816,384
8.212.128.0/1816,384
8.212.128.0/198,192
8.212.160.0/198,192
8.212.190.0/24256
8.212.191.0/24256
8.212.192.0/1816,384
8.212.192.0/198,192
8.212.224.0/198,192
8.213.0.0/1732,768
8.213.0.0/1816,384
8.213.64.0/1816,384
8.213.112.0/221,024
8.213.116.0/221,024
8.213.120.0/221,024
8.213.128.0/198,192
8.213.128.0/204,096
8.213.144.0/204,096
8.213.160.0/212,048
8.213.160.0/221,024
8.213.164.0/221,024
8.213.168.0/221,024
8.213.168.0/23512
8.213.170.0/23512
8.213.172.0/221,024
8.213.172.0/23512
8.213.174.0/23512
8.213.176.0/204,096
8.213.176.0/212,048
8.213.184.0/212,048
8.213.192.0/1816,384
8.213.192.0/198,192
8.213.224.0/198,192
8.213.251.0/24256
8.213.252.0/24256
8.213.253.0/24256
8.214.0.0/1665,536
8.214.0.0/1732,768
8.214.128.0/1732,768
8.215.0.0/1665,536
8.215.0.0/1732,768
8.215.128.0/1732,768
8.215.160.0/24256
8.215.162.0/23512
8.215.168.0/24256

Showing the first 100 of 1,166, in address order. Complete list on RIPEstat

IPv6 prefixes (136 prefixes)

Prefix
2400:3200::/48
2400:3200:baba::/48
2400:b200:4100::/48
2400:b200:4101::/48
2400:b200:4102::/48
2400:b200:4103::/48
2401:b180:4100::/48
2404:2280:1000::/36
2404:2280:1000::/37
2404:2280:1800::/37
2404:2280:2000::/36
2404:2280:2000::/37
2404:2280:2800::/37
2404:2280:3000::/36
2404:2280:3000::/37
2404:2280:3800::/37
2404:2280:4000::/36
2404:2280:4000::/37
2404:2280:4800::/37
2408:4000:101::/48
2408:4000:102::/48
2408:4000:1000::/48
2408:4009:500::/48
240b:4000::/32
240b:4000::/33
240b:4000:8000::/33
240b:4000:fffe::/48
240b:4000:ffff::/48
240b:4001::/32
240b:4001::/33
240b:4001:8000::/33
240b:4002::/32
240b:4002::/33
240b:4002:8000::/33
240b:4002:ffff::/48
240b:4004::/32
240b:4004::/33
240b:4004:8000::/33
240b:4005::/32
240b:4005::/33
240b:4005:8000::/33
240b:4005:fffe::/48
240b:4005:ffff::/48
240b:4006::/48
240b:4006:1000::/44
240b:4006:1000::/45
240b:4006:1000::/47
240b:4006:1002::/47
240b:4006:1008::/45
240b:4006:1010::/44
240b:4006:1010::/45
240b:4006:1018::/45
240b:4006:1020::/44
240b:4006:1020::/45
240b:4006:1028::/45
240b:4006:1100::/46
240b:4006:1100::/47
240b:4006:1102::/47
240b:4006:1104::/46
240b:4006:1104::/47
240b:4006:1106::/47
240b:4006:1108::/46
240b:4006:1108::/47
240b:4006:110a::/47
240b:4006:110c::/46
240b:4006:110c::/47
240b:4006:110e::/47
240b:4006:1110::/46
240b:4006:1110::/47
240b:4006:1112::/47
240b:4006:1114::/46
240b:4006:1114::/47
240b:4006:1116::/47
240b:4006:1118::/46
240b:4006:1118::/47
240b:4006:111a::/47
240b:4007::/32
240b:4007::/33
240b:4007:8000::/33
240b:4009::/32
240b:4009::/33
240b:4009:8000::/33
240b:400b::/32
240b:400b::/33
240b:400b:8000::/33
240b:400c::/32
240b:400c::/33
240b:400c:8000::/33
240b:400d::/32
240b:400d::/33
240b:400d:8000::/33
240b:400e::/32
240b:400e::/33
240b:400e:8000::/33
240b:400f::/32
240b:400f::/33
240b:400f:8000::/33
240b:4010:fffe::/48
240b:4010:ffff::/48
240b:4011::/32

Showing the first 100 of 136, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (104)

ASNetworkVisibility
AS21859Zenlayer Inc1,244
AS6453TATA COMMUNICATIONS (AMERICA) INC818
AS7473Singapore Telecommunications Ltd711
AS1299Arelion Sweden AB695
AS3356Level 3 Parent, LLC674
AS8966EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC661
AS9299Philippine Long Distance Telephone Company637
AS9318SK Broadband Co Ltd513
AS15802Emirates Integrated Telecommunications Company PJSC513
AS3491PCCW Global (HK) Ltd.496
AS2914NTT America, Inc.484
AS4775Globe Telecoms467
AS39386-418
AS4637Telstra Global402
AS9002RETN Limited395
AS135391AOFEI DATA INTERNATIONAL COMPANY LIMITED384
AS7195EDGEUNO S.A.S380
AS17676-357
AS6762TELECOM ITALIA SPARKLE S.p.A.354
AS12389PJSC Rostelecom351
AS4788-347
AS48237Etihad Etisalat, a joint stock company346
AS174Cogent Communications, LLC339
AS5511Opentransit Orange S.A.324
AS6461Zayo Bandwidth313
AS12956TELEFONICA GLOBAL SOLUTIONS SL280
AS1273IDDQD-AS274
AS138915Kaopu Cloud HK Limited271
AS9286KINX265
AS45903CMC Telecom Infrastructure Company250

The 30 most visible of 104.

Downstreams (customers) (1)

ASNetworkVisibility
AS24429Taobao - Zhejiang Taobao Network Co.,Ltd247

81 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.