subnet.im

AS7497Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)

ChinaRegistryAPNICTypeEyeball

As of 11th November 2026, AS7497 (Computer Network Information Center of…), an access network registered in China with APNIC, originates 470 IPv4 prefixes covering 1.1M addresses and 168 IPv6 prefixes. By IPv4 address space that makes it the 433rd-largest of the 80,747 networks we see originating IPv4, and the 37th-largest of 617 in China. It is seen behind 13 upstream networks, most often AS174 (Cogent Communications, LLC) and AS3491 (PCCW Global (HK) Ltd.), and in front of 4 downstream networks. Over 99% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

470

IPv6 prefixes

168

IPv4 addresses

1.1M

IPv6 /64s

77.3B

Upstream graph

The networks AS7497 is seen behind, one and two hops out, drawn from real AS paths.

AS7497Toward the internet core
Upstream graph for AS7497: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS7497Computer Network …This networkAS174Cogent Communicat…AS3491PCCW Global (HK) …AS4134China Telecom Bac…AS4635HKIX Route ServersAS6939Hurricane Electri…AS151326DCConnect Communi…AS1299Arelion (fka. Tel…AS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS3356Lumen (Level 3)AS7713PT Telkom Indones…AS18106Viewqwest Pte Ltd

Networks observed one and two hops upstream of AS7497 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

51

adjacent networks

Upstreams
1325%
Peers
3467%
Downstreams
48%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS7497
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer22,954115
AS3491PCCW Global (HK) Ltd.HKPeer18,17785
AS4635HKIX Route ServersHKPeer2,6346
AS4134China Telecom BackboneCNPeer2,46013
AS6939Hurricane Electric LLCUSPeer1,4294
AS293ESnetUSPeer4701
AS11537Internet2USPeer4701
AS24482SG.GSSGPeer4391
AS49544i3D.net B.VNLPeer4391
AS132337AxclusiveSGAdjacent4391

Prefixes

All 638

The largest blocks AS7497 originates, widest first.

Largest prefixes originated by AS7497
PrefixAddressesVisibility
49.210.0.0/15131k76/76
101.252.0.0/15131k76/76
119.78.0.0/15131k76/76
124.16.0.0/15131k76/76
223.192.0.0/15131k76/76
159.226.0.0/1665.5k76/76
60.245.128.0/1732.8k76/76
210.72.0.0/1732.8k76/76
124.16.64.0/1816.4k76/76
210.73.0.0/1816.4k76/76

Routing health

How AS7497's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid99.5%635
  • Invalid0.0%0
  • No ROA0.5%3

Propagation

  • Globally propagated90% of full-feed peers or more99.5%635
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.5%3

Prefix sizes

IPv4 — 470 prefixes

IPv6 — 168 prefixes

  • /2868.7B × /640.6%1
  • /324.3B × /641.2%2
  • /4865.5k × /6498.2%165

Recent changes

Announcements that started or stopped since 12th Oct 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.