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Autonomous System

AS45090 · Shenzhen Tencent Computer Systems Company Limited

Overview

AS45090 is announced on the Internet: RIPE RIS route collectors currently see 2,220 IPv4 prefixes and 47 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 6,213,888 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 18 upstream neighbours (transit providers or peers) and no downstream neighbour (customers or networks it carries). Its most visible upstreams are CHINANET Guangdong province network (AS58466), China Telecom (Group) (AS4811), and CERNET New Technology Co., Ltd (AS133111). AS45090 was assigned by APNIC, and its registration country is China.

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

Trace a route to this networkOpen in the BGP viewerWHOIS of 1.12.0.1

The trace goes to 1.12.0.1, the first address of 1.12.0.0/14. 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 (2,220 prefixes)

PrefixAddresses
1.12.0.0/14262,144
1.12.0.0/1816,384
1.12.14.0/23512
1.12.64.0/1816,384
1.12.128.0/1816,384
1.12.192.0/1816,384
1.13.0.0/1816,384
1.13.64.0/1816,384
1.13.128.0/1816,384
1.13.148.0/24256
1.13.192.0/1816,384
1.14.0.0/1816,384
1.14.64.0/1816,384
1.14.128.0/1816,384
1.14.192.0/1816,384
1.15.0.0/1816,384
1.15.64.0/1816,384
1.15.128.0/1816,384
1.15.192.0/1816,384
1.116.0.0/15131,072
1.116.0.0/1816,384
1.116.64.0/1816,384
1.116.128.0/1816,384
1.116.192.0/1816,384
1.117.0.0/1816,384
1.117.64.0/1816,384
1.117.128.0/1816,384
1.117.192.0/1816,384
42.187.128.0/1732,768
42.187.128.0/1816,384
42.187.192.0/1816,384
42.192.0.0/15131,072
42.192.0.0/1816,384
42.192.64.0/1816,384
42.192.128.0/1816,384
42.192.192.0/1816,384
42.193.0.0/1816,384
42.193.64.0/198,192
42.193.64.0/204,096
42.193.80.0/221,024
42.193.84.0/221,024
42.193.88.0/212,048
42.193.96.0/198,192
42.193.128.0/1816,384
42.193.192.0/1816,384
42.194.128.0/1732,768
42.194.128.0/1816,384
42.194.192.0/1816,384
43.136.0.0/14262,144
43.136.0.0/1816,384
43.136.64.0/1816,384
43.136.128.0/1816,384
43.136.192.0/1816,384
43.137.0.0/1816,384
43.137.64.0/1816,384
43.137.128.0/198,192
43.137.160.0/198,192
43.137.192.0/198,192
43.137.224.0/204,096
43.137.240.0/204,096
43.138.0.0/1816,384
43.138.64.0/1816,384
43.138.128.0/1816,384
43.138.192.0/1816,384
43.139.0.0/1816,384
43.139.64.0/1816,384
43.139.128.0/1816,384
43.139.192.0/1816,384
43.140.0.0/14262,144
43.140.0.0/1816,384
43.140.64.0/1816,384
43.140.128.0/1816,384
43.140.192.0/1816,384
43.141.0.0/198,192
43.141.32.0/198,192
43.141.64.0/198,192
43.141.96.0/198,192
43.141.128.0/198,192
43.141.160.0/198,192
43.141.192.0/1816,384
43.142.0.0/1816,384
43.142.64.0/1816,384
43.142.128.0/1816,384
43.142.192.0/1816,384
43.143.0.0/1816,384
43.143.64.0/1816,384
43.143.128.0/1816,384
43.143.192.0/1816,384
43.144.0.0/15131,072
43.144.0.0/1816,384
43.144.64.0/1816,384
43.144.128.0/1816,384
43.144.192.0/1816,384
43.145.0.0/1816,384
43.145.64.0/1816,384
43.176.0.0/14262,144
43.179.128.0/1816,384
43.179.192.0/1816,384
43.180.0.0/1665,536
43.180.0.0/198,192

Showing the first 100 of 2,220, in address order. Complete list on RIPEstat

IPv6 prefixes (47 prefixes)

Prefix
2402:4e00::/32
2402:4e00::/33
2402:4e00::/35
2402:4e00::/48
2402:4e00:1::/48
2402:4e00:4::/48
2402:4e00:6::/48
2402:4e00:8::/48
2402:4e00:9::/48
2402:4e00:20::/44
2402:4e00:30::/44
2402:4e00:40::/44
2402:4e00:100::/48
2402:4e00:1000::/40
2402:4e00:1100::/40
2402:4e00:1200::/40
2402:4e00:1300::/40
2402:4e00:1400::/40
2402:4e00:1500::/40
2402:4e00:1600::/40
2402:4e00:1700::/40
2402:4e00:1800::/40
2402:4e00:1900::/40
2402:4e00:1a00::/40
2402:4e00:4010::/44
2402:4e00:4011::/48
2402:4e00:4020::/44
2402:4e00:4030::/44
2402:4e00:4040::/44
2402:4e00:4050::/44
2402:4e00:4060::/44
2402:4e00:4070::/44
2402:4e00:4080::/44
2402:4e00:8000::/33
2402:4e00:8000::/48
2402:4e00:8001::/48
2402:4e00:8020::/44
2402:4e00:8030::/48
2402:4e00:c000::/48
2402:4e00:c010::/44
2402:4e00:c020::/44
2402:4e00:c030::/44
2402:4e00:c040::/44
2402:4e00:c050::/44
2402:4e00:c060::/44
2402:4e00:c070::/44
2402:4e00:d018::/45

Neighbours

Upstreams (transit or peers) (18)

ASNetworkVisibility
AS58466CHINANET Guangdong province network1,031
AS4811China Telecom (Group)966
AS133111CERNET New Technology Co., Ltd400
AS58542Tianjij,300000373
AS38283CHINANET SiChuan Telecom Internet Data Center372
AS134756CHINANET Nanjing Jishan IDC network359
AS23724IDC, China Telecommunications Corporation315
AS131574Beijing Haiyu Technology Co. Ltd..290
AS134420Chongqing Telecom262
AS134169CERNEWTECH (Beijing) co.,LTD131
AS24400-59
AS4837CHINA UNICOM China169 Backbone9
AS136958China Unicom Guangdong IP network9
AS4808China Unicom Beijing Province Network7
AS140979-7
AS9808China Mobile Communications Group Co., Ltd.3
AS4816-1
AS56040-1

Downstreams (customers) (0)

None seen.

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.