$ query “AS17621” --type=asn → 1 result(s)

AS17621 · CNCGROUP-SH

China Unicom Shanghai network

AS17621 is run by China Unicom Shanghai network and is a mid-size transit provider, registered in China. The system announces an impressive 1.0 million IPv4 addresses, including a /15, and supports IPv6. Its primary geographic footprint is in China. This AS has recently updated its prefix announcements.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇨🇳 China
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Last Changed
March 04, 2026
Last Seen
October 23, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
397 / 116
IPv6 Prefixes (raw / aggregated)
425 / 160
IPv4 Addresses
1 025 536
Largest IPv4 Prefix
/15 (131 072 addresses)
Largest IPv6 Prefix
/30
Geolocated Countries
🇨🇳 China (1 025 536 IPs)
Prefix Changed
October 17, 2026

Reputation

Reputation
Good — 64 flagged IPs out of 1 025 536 total (0.01%)
Open Proxies
1 known open proxies in this network

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Downstream Customers
36 downstreams buying transit
Unclassified
10 unclassified BGP neighbors
Degree
48 unique BGP neighbors
Reach
36 networks in customer cone

Upstream Providers (2)

Prefix Lists

IPv4 Prefixes (397 total)

  • 58.246.0.0/15 (131 072 addresses (/15 prefix))
  • 112.64.0.0/15 (131 072 addresses (/15 prefix))
  • 139.226.0.0/15 (131 072 addresses (/15 prefix))
  • 140.206.0.0/15 (131 072 addresses (/15 prefix))
  • 223.166.0.0/15 (131 072 addresses (/15 prefix))
  • 220.196.0.0/16 (65 536 addresses (/16 prefix))
  • 27.115.0.0/17 (32 768 addresses (/17 prefix))
  • 211.95.0.0/17 (32 768 addresses (/17 prefix))
  • 220.248.0.0/17 (32 768 addresses (/17 prefix))
  • 116.128.128.0/18 (16 384 addresses (/18 prefix))
  • 120.92.128.0/18 (16 384 addresses (/18 prefix))
  • 210.22.64.0/18 (16 384 addresses (/18 prefix))
  • 210.22.128.0/18 (16 384 addresses (/18 prefix))
  • 106.75.224.0/19 (8 192 addresses (/19 prefix))
  • 110.43.128.0/19 (8 192 addresses (/19 prefix))
  • 113.31.96.0/19 (8 192 addresses (/19 prefix))
  • 113.31.160.0/19 (8 192 addresses (/19 prefix))
  • 220.203.224.0/19 (8 192 addresses (/19 prefix))
  • 103.202.96.0/20 (4 096 addresses (/20 prefix))
  • 103.202.128.0/20 (4 096 addresses (/20 prefix))
  • 106.75.208.0/20 (4 096 addresses (/20 prefix))
  • 113.31.144.0/20 (4 096 addresses (/20 prefix))
  • 116.128.208.0/20 (4 096 addresses (/20 prefix))
  • 120.92.224.0/20 (4 096 addresses (/20 prefix))
  • 175.102.16.0/20 (4 096 addresses (/20 prefix))
  • 202.90.96.0/20 (4 096 addresses (/20 prefix))
  • 211.144.192.0/20 (4 096 addresses (/20 prefix))
  • 101.52.216.0/21 (2 048 addresses (/21 prefix))
  • 101.52.248.0/21 (2 048 addresses (/21 prefix))
  • 103.202.120.0/21 (2 048 addresses (/21 prefix))
  • 116.128.200.0/21 (2 048 addresses (/21 prefix))
  • 120.133.216.0/21 (2 048 addresses (/21 prefix))
  • 120.133.224.0/21 (2 048 addresses (/21 prefix))
  • 120.136.168.0/21 (2 048 addresses (/21 prefix))
  • 202.136.208.0/21 (2 048 addresses (/21 prefix))
  • 203.76.208.0/21 (2 048 addresses (/21 prefix))
  • 210.22.240.0/21 (2 048 addresses (/21 prefix))
  • 43.243.148.0/22 (1 024 addresses (/22 prefix))
  • 43.250.144.0/22 (1 024 addresses (/22 prefix))
  • 43.254.224.0/22 (1 024 addresses (/22 prefix))
  • 101.52.212.0/22 (1 024 addresses (/22 prefix))
  • 103.5.192.0/22 (1 024 addresses (/22 prefix))
  • 103.36.136.0/22 (1 024 addresses (/22 prefix))
  • 103.38.232.0/22 (1 024 addresses (/22 prefix))
  • 103.202.92.0/22 (1 024 addresses (/22 prefix))
  • 103.202.112.0/22 (1 024 addresses (/22 prefix))
  • 103.202.144.0/22 (1 024 addresses (/22 prefix))
  • 103.250.192.0/22 (1 024 addresses (/22 prefix))
  • 113.21.236.0/22 (1 024 addresses (/22 prefix))
  • 120.133.236.0/22 (1 024 addresses (/22 prefix))

IPv6 Prefixes (425 total)

  • 2408:820c::/30
  • 2408:860c::/30
  • 2408:870c::/30
  • 2408:880c::/30
  • 2408:8810::/31
  • 2408:890c::/31
  • 2408:8025::/32
  • 2408:8026::/32
  • 2408:84e2::/32
  • 2408:8024:8000::/33
  • 2408:8000:9000::/36
  • 2408:80f1:200::/40
  • 2408:840c::/40
  • 2408:840c:200::/40
  • 2408:840c:d00::/40
  • 2408:840c:f00::/40
  • 2408:840c:1a00::/40
  • 2408:840c:1c00::/40
  • 2408:840c:2700::/40
  • 2408:840c:2900::/40
  • 2408:840c:3400::/40
  • 2408:840c:3600::/40
  • 2408:840c:4e00::/40
  • 2408:840c:5000::/40
  • 2408:840c:5b00::/40
  • 2408:840c:5d00::/40
  • 2408:840c:6800::/40
  • 2408:840c:6a00::/40
  • 2408:840c:7500::/40
  • 2408:840c:7700::/40
  • 2408:840c:8200::/40
  • 2408:840c:8400::/40
  • 2408:840c:8f00::/40
  • 2408:840c:9100::/40
  • 2408:840c:9c00::/40
  • 2408:840c:9e00::/40
  • 2408:840c:a900::/40
  • 2408:840c:ab00::/40
  • 2408:840c:b600::/40
  • 2408:840c:b800::/40
  • 2408:840c:c300::/40
  • 2408:840c:c500::/40
  • 2408:840c:d000::/40
  • 2408:840c:d200::/40
  • 2408:840c:dd00::/40
  • 2408:840c:de00::/40
  • 2408:840e:dd00::/40
  • 2408:840e:de00::/40
  • 2408:80f1:80::/41
  • 2408:840d::/42