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AS23600
AS23600 Korea Internet Security Agency
GDNSKR-KR-KR - Korea Internet Security Agency · registered in South Korea
IPv4 addresses 3,072 11 prefixes · <0.001% of announced IPv4
Rank in South Korea #342 largest network in KR by IPv4 space, of 853 · <0.01% of KR
Rank worldwide #18,464 of 79,396 networks with IPv4
IPv6 5 x /48 4 prefixes
IPv4 prefixes
All 11 prefixes, in address order.
1.18.132.0/23 1.18.134.0/24 39.127.249.0/24 58.235.102.0/24 202.30.45.0/24 202.31.188.0/24 202.31.190.0/24 203.83.158.0/24 219.251.142.0/24 219.251.156.0/24 221.139.191.0/24
IPv6 prefixes
All 4 prefixes.
2001:dc5:a::/48 2001:dcc:700::/48 2001:dcc:702::/47 2001:dcc:1000::/48
Other ASNs named Korea Internet Security Agency
9 other networks use the same organisation name; together with AS23600 they announce 15,616 IPv4 addresses.
ASN Name IPv4 addresses
AS9858 KRNICNET-KR - Korea Internet Security Agency KR 5,120 AS9640 KRCERT-AS-KR-KR - Korea Internet Security Agency KR 2,048 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
AS38667 #339 KAKAOBANK-AS-KR-KR - KakaoBank Corp.3,328 AS55626 #340 KYUNGIN-AS-KR-KR - Kyungin Womens college3,328 AS131795 #341 KIER-AS-KR-KR - KOREA INSTITUTE OF ENERGY RESEARCH3,328 AS7559 #343 DONGA-NET-AS-KR - donga.com3,072 AS9773 #344 HANCOMWITH-AS-KR-KR - HancomWITH3,072 AS10046 #345 HOWON-AS-KR - HOWON UNIVERSITY3,072
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