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Autonomous System

AS204211 · Shanghai Yingyun Network Technology Co., Ltd.

Overview

AS204211 is announced on the Internet: RIPE RIS route collectors currently see 1 IPv4 prefix and 13 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 256 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 18 upstream neighbours (transit providers or peers) and 18 downstream neighbours (customers or networks it carries). Its most visible upstreams are Cogent Communications, LLC (AS174), Cornseed Limited (AS206069), and MoeDove LLC (AS44324). AS204211 was assigned by RIPE NCC, and its registration country is China.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 1:14 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 44.30.171.1

The trace goes to 44.30.171.1, the first address of 44.30.171.0/24. 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 prefix)

PrefixAddresses
44.30.171.0/24256

IPv6 prefixes (13 prefixes)

Prefix
2602:f9f6:450::/48
2a0a:d685:1e0::/48
2a0a:d685:1fd::/48
2a0f:9400:6110::/48
2a12:cb47:ffff::/48
2a14:7586:6103::/48
2a14:7586:6104::/48
2a14:7586:6106::/48
2a14:7586:6107::/48
2a14:7586:6108::/48
2a14:7586:6110::/48
2a14:7586:6113::/48
2a14:7586:6115::/48

Neighbours

Upstreams (transit or peers) (18)

ASNetworkVisibility
AS174Cogent Communications, LLC5,726
AS206069Cornseed Limited2,786
AS44324MoeDove LLC504
AS210352YijiaXu Yijia Xu266
AS204539Axivora Connect Ltd235
AS401804Maxwell Telecom LLC233
AS139317Ningbo Dahuamao Information Technology Co Ltd230
AS6939Hurricane Electric LLC218
AS207529NyanLoliNetwork NYANLOLI LTD166
AS51087Bling Network Ltd39
AS25091IP-Max SA5
AS8298IPng Networks GmbH2
AS56584-2
AS62000SERVERD SAS2
AS401753BIXCE Inc2
AS1239Cogent Communications, LLC1
AS48646SDRmedia Verwaltungs GmbH1
AS56911Warian S.R.L.1

Downstreams (customers) (18)

ASNetworkVisibility
AS139317Ningbo Dahuamao Information Technology Co Ltd5,080
AS211729Yiming Zhang278
AS197817Nyco Cloud Network LLC268
AS219378ZHANG XIYUAN263
AS203314HATS NETWORK INC.260
AS215502Xing Qingyu258
AS207529NyanLoliNetwork NYANLOLI LTD257
AS151785Zhou Yang256
AS201705Xinrun Li256
AS218538ARGSMENT LIMITED234
AS213891-233
AS202396-166
AS202939-70
AS47778-55
AS210352-35
AS205369-10
AS202335-8
AS219332-2

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.