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Autonomous System

AS7497 · Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)

Overview

AS7497 is announced on the Internet: RIPE RIS route collectors currently see 466 IPv4 prefixes and 168 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 859,648 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 17 upstream neighbours (transit providers or peers) and 6 downstream neighbours (customers or networks it carries). Its most visible upstreams are Cogent Communications, LLC (AS174), PCCW Global (HK) Ltd. (AS3491), and No.31,Jin-rong Street (AS4134). AS7497 was assigned by APNIC, and its registration country is China.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 9:49 PM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 49.210.0.1

The trace goes to 49.210.0.1, the first address of 49.210.0.0/15. 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 (466 prefixes)

PrefixAddresses
49.210.0.0/15131,072
49.210.0.0/24256
49.210.96.0/221,024
49.210.128.0/24256
49.210.196.0/24256
49.210.252.0/221,024
60.245.128.0/1732,768
60.245.128.0/24256
60.245.193.0/24256
60.245.194.0/24256
60.245.196.0/24256
60.245.197.0/24256
60.245.198.0/24256
60.245.208.0/212,048
101.252.0.0/15131,072
103.2.208.0/221,024
119.78.0.0/15131,072
119.78.2.0/24256
119.78.4.0/23512
119.78.6.0/24256
119.78.7.0/24256
119.78.64.0/204,096
119.78.64.0/24256
119.78.78.0/23512
119.78.80.0/23512
119.78.84.0/23512
119.78.96.0/23512
119.78.98.0/23512
119.78.100.0/24256
119.78.101.0/24256
119.78.103.0/24256
119.78.104.0/221,024
119.78.128.0/23512
119.78.130.0/23512
119.78.132.0/221,024
119.78.148.0/221,024
119.78.160.0/221,024
119.78.165.0/24256
119.78.167.0/24256
119.78.168.0/221,024
119.78.172.0/23512
119.78.209.0/24256
119.78.210.0/24256
119.78.212.0/24256
119.78.213.0/24256
119.78.214.0/24256
119.78.216.0/24256
119.78.218.0/24256
119.78.224.0/198,192
119.78.224.0/23512
119.78.226.0/23512
119.78.232.0/24256
119.78.234.0/24256
119.78.236.0/221,024
119.78.241.0/24256
119.78.242.0/24256
119.78.243.0/24256
119.78.248.0/221,024
119.78.253.0/24256
119.78.254.0/24256
119.78.255.0/24256
119.79.246.0/23512
119.79.248.0/212,048
124.16.0.0/15131,072
124.16.0.0/23512
124.16.2.0/23512
124.16.4.0/221,024
124.16.8.0/24256
124.16.9.0/24256
124.16.10.0/23512
124.16.10.0/24256
124.16.14.0/23512
124.16.26.0/23512
124.16.29.0/24256
124.16.31.0/24256
124.16.64.0/1816,384
124.16.64.0/198,192
124.16.76.0/221,024
124.16.84.0/221,024
124.16.88.0/221,024
124.16.96.0/23512
124.16.130.0/23512
124.16.132.0/23512
124.16.134.0/24256
124.16.136.0/221,024
124.16.140.0/23512
124.16.142.0/23512
124.16.144.0/221,024
124.16.149.0/24256
124.16.150.0/23512
124.16.152.0/24256
124.16.154.0/24256
124.16.156.0/23512
124.16.158.0/24256
124.16.160.0/221,024
124.16.164.0/24256
124.16.165.0/24256
124.16.166.0/23512
124.16.170.0/23512
124.16.173.0/24256

Showing the first 100 of 466, in address order. Complete list on RIPEstat

IPv6 prefixes (168 prefixes)

Prefix
2001:cc0::/32
2400:dd00::/28
2400:dd01:1001::/48
2400:dd01:1002::/48
2400:dd01:1003::/48
2400:dd01:1004::/48
2400:dd01:1005::/48
2400:dd01:1006::/48
2400:dd01:1007::/48
2400:dd01:1008::/48
2400:dd01:1009::/48
2400:dd01:100b::/48
2400:dd01:100c::/48
2400:dd01:100d::/48
2400:dd01:100e::/48
2400:dd01:100f::/48
2400:dd01:1011::/48
2400:dd01:1012::/48
2400:dd01:1013::/48
2400:dd01:1014::/48
2400:dd01:1015::/48
2400:dd01:1017::/48
2400:dd01:101a::/48
2400:dd01:101c::/48
2400:dd01:1020::/48
2400:dd01:1021::/48
2400:dd01:1023::/48
2400:dd01:1024::/48
2400:dd01:1025::/48
2400:dd01:1027::/48
2400:dd01:1029::/48
2400:dd01:102a::/48
2400:dd01:102b::/48
2400:dd01:102c::/48
2400:dd01:102d::/48
2400:dd01:102e::/48
2400:dd01:102f::/48
2400:dd01:1030::/48
2400:dd01:1031::/48
2400:dd01:1032::/48
2400:dd01:1033::/48
2400:dd01:1034::/48
2400:dd01:1035::/48
2400:dd01:1036::/48
2400:dd01:1037::/48
2400:dd01:1038::/48
2400:dd01:1039::/48
2400:dd01:103a::/48
2400:dd01:103b::/48
2400:dd01:103d::/48
2400:dd01:103e::/48
2400:dd01:103f::/48
2400:dd01:2000::/48
2400:dd01:2001::/48
2400:dd01:2002::/48
2400:dd01:2003::/48
2400:dd01:2005::/48
2400:dd01:2006::/48
2400:dd01:2007::/48
2400:dd01:2008::/48
2400:dd01:2009::/48
2400:dd01:200a::/48
2400:dd01:200b::/48
2400:dd01:200c::/48
2400:dd01:200d::/48
2400:dd01:200f::/48
2400:dd01:3001::/48
2400:dd01:3002::/48
2400:dd01:3004::/48
2400:dd01:3007::/48
2400:dd01:3008::/48
2400:dd01:3009::/48
2400:dd01:300a::/48
2400:dd01:300b::/48
2400:dd01:300c::/48
2400:dd01:300e::/48
2400:dd01:300f::/48
2400:dd01:3010::/48
2400:dd01:3011::/48
2400:dd01:3012::/48
2400:dd01:3013::/48
2400:dd01:3014::/48
2400:dd01:3018::/48
2400:dd01:301a::/48
2400:dd01:301b::/48
2400:dd01:3020::/48
2400:dd01:e001::/48
2400:dd02:1003::/48
2400:dd02:1004::/48
2400:dd02:1005::/48
2400:dd02:1006::/48
2400:dd02:1007::/48
2400:dd02:1008::/48
2400:dd02:1009::/48
2400:dd02:100a::/48
2400:dd02:100c::/48
2400:dd02:100d::/48
2400:dd02:100e::/48
2400:dd02:100f::/48
2400:dd02:1010::/48

Showing the first 100 of 168, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (17)

ASNetworkVisibility
AS174Cogent Communications, LLC1,265
AS3491PCCW Global (HK) Ltd.1,137
AS4134No.31,Jin-rong Street76
AS20965GEANT Vereniging24
AS6939Hurricane Electric LLC21
AS23911China Next Generation Internet Beijing IX21
AS4837CHINA UNICOM China169 Backbone17
AS4635Hong Kong Internet Exchange--Route Server 18
AS7660Asia Pacific Advanced Network - Japan8
AS11537Internet28
AS9808China Mobile Communications Group Co., Ltd.6
AS23855-3
AS1103-2
AS2907Research Organization of Information and Systems, National Institute of Informatics2
AS8359MTS PJSC2
AS7575Australian Academic and Research Network (AARNet)1
AS39120Convergenze S.p.A.1

Downstreams (customers) (6)

ASNetworkVisibility
AS38345Internet Domain Name System Beijing Engineering Resrarch Center Ltd.879
AS24151China Internet Network Infomation Center650
AS63555Beijing Beilong Yunhai Network Data Technology Corporation394
AS24409China Internet Network Infomation Center22
AS3491PCCW Global (HK) Ltd.8
AS4538China Education and Research Network Center6

3 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.