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AS9640
AS9640 Korea Internet Security Agency
KRCERT-AS-KR-KR - Korea Internet Security Agency · registered in South Korea
IPv4 addresses 2,048 5 prefixes · <0.001% of announced IPv4
Rank in South Korea #372 largest network in KR by IPv4 space, of 853 · <0.01% of KR
Rank worldwide #22,795 of 79,396 networks with IPv4
IPv6 none no IPv6 routes announced
IPv4 prefixes
All 5 prefixes, in address order.
180.222.220.0/24 192.5.90.0/24 192.132.247.0/24 192.203.140.0/24 218.37.128.0/22
Other ASNs named Korea Internet Security Agency
9 other networks use the same organisation name; together with AS9640 they announce 15,616 IPv4 addresses.
ASN Name IPv4 addresses
AS9858 KRNICNET-KR - Korea Internet Security Agency KR 5,120 AS23600 GDNSKR-KR-KR - Korea Internet Security Agency KR 3,072 AS23596 EDNSKR-KR-KR - Korea Internet Security Agency KR 1,280 AS23599 DDNSKR-KR-KR - Korea Internet Security Agency KR 1,024 AS9642 KISA-KR - Korea Internet Security Agency KR 1,024 AS131100 FDNSKR-AS-KR-KR - Korea Internet Security Agency KR 768 AS131098 BDNSKR-AS-KR-KR - Korea Internet Security Agency KR 512 AS131099 CDNSKR-AS-KR-KR - Korea Internet Security Agency KR 512 AS9755 RPKINET1-KR - Korea Internet Security Agency KR 256
Similar-sized networks in South Korea
ASN Name IPv4 addresses
AS18324 #369 MASANC-AS-KR-KR - Masan College2,304 AS24026 #370 KFE-AS-KR-KR - KOREA INSTITUTE OF FUSION ENERGY2,304 AS38427 #371 STXIDC-AS-KR-KR - FORCETEC Co., LTD.2,304 AS9703 #373 SHB-AS-KR - Shinhan Bank2,048 AS9953 #374 HDVenture-AS-KR - Hyundai Engineering Construction Co., Ltd.(HDEC)2,048 AS10042 #375 DPC-AS-KR-KR - SUSEONG COLLEGE2,048
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