AS4665 Yonsei University

YONSEI-AS-KR-KR - Yonsei University · registered in South Korea

IPv4 addresses65,28026 prefixes · 0.002% of announced IPv4

Rank in South Korea#99largest network in KR by IPv4 space, of 853 · 0.06% of KR

Rank worldwide#3,475of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountrySouth Korea869 ASNs registered there

Open AS4665 in ASN lookup Look up an IP in this network (1.233.206.1) All networks in South Korea

IPv4 prefixes

All 26 prefixes, in address order.

1.233.206.0/23
1.233.208.0/20
1.233.224.0/23
1.233.226.0/24
1.233.227.0/24
1.233.228.0/22
1.233.232.0/21
1.233.240.0/20
61.32.255.0/24
61.43.204.0/24
115.88.77.0/24
165.132.0.0/22
165.132.4.0/24
165.132.6.0/23
165.132.8.0/21
165.132.16.0/23
165.132.18.0/24
165.132.20.0/22
165.132.24.0/21
165.132.32.0/19
165.132.64.0/18
165.132.128.0/18
165.132.192.0/21
165.132.200.0/24
165.132.224.0/23
165.132.255.0/24

Similar-sized networks in South Korea

ASNNameIPv4 addresses

AS18298#96 CNUNET-AS-KR-KR - Chungnam National University65,536

AS23908#97 AIRPORT-AS-KR-KR - IIAC65,536

AS23980#98 YU-AS-KR-KR - Yeungnam University65,536

AS45372#100 ULN-AS-KR-KR - ULNetworks Co., Ltd.63,488

AS9950#101 PUBNETPLUS2-AS-KR-KR - DACOM-PUBNETPLUS63,232

AS45374#102 CCS-AS-KR-KR - CCS62,976

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources