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AS17841 NATIONAL INFORMATION RESOURCES SERVICE

NCIA-AS-KR-KR - NATIONAL INFORMATION RESOURCES SERVICE · registered in South Korea

IPv4 addresses225,280187 prefixes · 0.007% of announced IPv4
Rank in South Korea#23largest network in KR by IPv4 space, of 853 · 0.21% of KR
Rank worldwide#1,000of 79,396 networks with IPv4
IPv6noneno IPv6 routes announced
CountrySouth Korea869 ASNs registered there
Open AS17841 in ASN lookup Look up an IP in this network (27.101.0.1) All networks in South Korea

IPv4 prefixes

All 187 prefixes, in address order.

  • 27.101.0.0/17
  • 27.101.128.0/19
  • 27.101.160.0/22
  • 27.101.164.0/23
  • 27.101.166.0/24
  • 27.101.167.0/24
  • 27.101.168.0/24
  • 27.101.169.0/24
  • 27.101.170.0/23
  • 27.101.172.0/22
  • 27.101.176.0/20
  • 27.101.192.0/21
  • 27.101.200.0/22
  • 27.101.204.0/24
  • 27.101.205.0/24
  • 27.101.206.0/23
  • 27.101.208.0/21
  • 27.101.216.0/24
  • 27.101.217.0/24
  • 27.101.218.0/23
  • 27.101.220.0/22
  • 27.101.224.0/22
  • 27.101.228.0/24
  • 27.101.229.0/24
  • 27.101.230.0/23
  • 27.101.232.0/23
  • 27.101.234.0/24
  • 27.101.235.0/24
  • 27.101.236.0/22
  • 27.101.240.0/20
  • 58.184.121.0/24
  • 61.72.224.0/23
  • 61.72.226.0/24
  • 61.72.230.0/24
  • 61.72.238.0/23
  • 61.104.76.0/24
  • 101.79.44.0/23
  • 116.67.0.0/17
  • 123.32.255.0/24
  • 125.60.0.0/22
  • 125.60.4.0/22
  • 125.60.8.0/22
  • 125.60.12.0/23
  • 125.60.14.0/23
  • 125.60.16.0/20
  • 125.60.32.0/22
  • 125.60.36.0/23
  • 125.60.38.0/24
  • 125.60.39.0/24
  • 125.60.40.0/22
  • 125.60.44.0/23
  • 125.60.46.0/23
  • 125.60.48.0/22
  • 125.60.52.0/22
  • 125.60.56.0/22
  • 125.60.60.0/23
  • 125.60.62.0/23
  • 125.61.116.0/23
  • 125.128.64.0/19
  • 152.99.0.0/19
  • 152.99.32.0/21
  • 152.99.40.0/22
  • 152.99.44.0/24
  • 152.99.45.0/24
  • 152.99.46.0/23
  • 152.99.48.0/20
  • 152.99.64.0/21
  • 152.99.72.0/23
  • 152.99.74.0/23
  • 152.99.76.0/22
  • 152.99.80.0/23
  • 152.99.82.0/24
  • 152.99.83.0/24
  • 152.99.84.0/24
  • 152.99.85.0/24
  • 152.99.86.0/23
  • 152.99.88.0/21
  • 152.99.96.0/20
  • 152.99.112.0/21
  • 152.99.120.0/24
  • 152.99.121.0/24
  • 152.99.122.0/23
  • 152.99.124.0/22
  • 152.99.128.0/20
  • 152.99.144.0/22
  • 152.99.148.0/23
  • 152.99.150.0/23
  • 152.99.152.0/21
  • 152.99.160.0/20
  • 152.99.176.0/23
  • 152.99.178.0/23
  • 152.99.180.0/22
  • 152.99.184.0/23
  • 152.99.186.0/24
  • 152.99.187.0/24
  • 152.99.188.0/22
  • 152.99.192.0/22
  • 152.99.196.0/23
  • 152.99.198.0/23
  • 152.99.200.0/22
  • 152.99.204.0/24
  • 152.99.205.0/24
  • 152.99.206.0/23
  • 152.99.208.0/22
  • 152.99.212.0/23
  • 152.99.214.0/23
  • 152.99.216.0/21
  • 152.99.224.0/19
  • 168.126.120.0/22
  • 180.210.69.0/24
  • 180.210.72.0/23
  • 180.210.85.0/24
  • 180.210.86.0/24
  • 180.210.93.0/24
  • 180.210.94.0/24
  • 180.210.98.0/23
  • 203.233.54.0/23
  • 203.233.56.0/23
  • 203.238.160.0/23
  • 203.238.162.0/23
  • 203.238.164.0/24
  • 203.238.165.0/24
  • 203.238.166.0/24
  • 203.238.167.0/24
  • 203.238.168.0/21
  • 203.241.52.0/24
  • 203.242.0.0/22
  • 203.242.4.0/24
  • 203.242.6.0/24
  • 203.243.1.0/24
  • 203.254.96.0/23
  • 203.254.110.0/24
  • 203.254.121.0/24
  • 210.90.8.0/24
  • 210.90.15.0/24
  • 210.95.181.0/24
  • 210.95.187.0/24
  • 210.95.219.0/24
  • 210.97.27.0/24
  • 210.99.24.0/23
  • 210.99.48.0/21
  • 210.99.62.0/24
  • 210.99.248.0/24
  • 210.103.63.0/24
  • 210.103.72.0/24
  • 210.103.81.0/24
  • 210.103.82.0/23
  • 210.104.41.0/24
  • 210.104.140.0/24
  • 210.104.148.0/24
  • 210.104.249.0/24
  • 210.104.250.0/24
  • 210.106.108.0/24
  • 210.178.100.0/23
  • 210.179.148.0/24
  • 210.179.205.0/24
  • 211.34.86.0/24
  • 211.34.108.0/23
  • 211.39.76.0/24
  • 211.39.91.0/24
  • 211.39.92.0/23
  • 211.39.94.0/24
  • 211.42.72.0/22
  • 211.42.84.0/23
  • 211.42.86.0/24
  • 211.57.153.0/24
  • 211.61.29.0/24
  • 211.112.154.0/24
  • 211.114.22.0/24
  • 211.114.24.0/24
  • 211.173.34.0/23
  • 211.173.36.0/22
  • 211.173.46.0/24
  • 211.184.197.0/24
  • 211.250.131.0/24
  • 211.252.37.0/24
  • 211.252.203.0/24
  • 211.253.60.0/23
  • 211.253.62.0/24
  • 211.253.82.0/24
  • 211.253.98.0/23
  • 211.253.121.0/24
  • 211.253.122.0/24
  • 211.253.124.0/24
  • 211.253.148.0/24
  • 222.111.168.0/22
  • 222.111.248.0/21

Similar-sized networks in South Korea

ASNNameIPv4 addresses
AS17864#20 SKB-TBROAD_HANVIT-AS-KR-KR - SK Broadband Co Ltd227,328
AS9286#21 KINXIDC-AS-KR-KR - KINX226,432
AS9943#22 KNCTV-AS-KR - KangNam CableTV225,792
AS9689#24 SKB-FCABLE-AS-KR - SK Broadband Co Ltd213,504
AS23563#25 SKB-VITSSEN-SUWON-AS-KR-KR - SK Broadband Co Ltd203,776
AS9694#26 SEOKYUNG-CATV-AS-KR-KR - Seokyung Cable Television Co.. Ltd.197,632

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