IPv4 prefix
121.128.0.0/10
- IP Prefix (CIDR)
- 121.128.0.0/10
- Subnet Mask
- 255.192.0.0
- Address Count
- 4,194,304
- Owner
- IP Manager
- Handle
- IM9-KR
- Country
-
Korea (the Republic of) (KR)
- Address
- Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90 KT Head Office
- Registry
- KRNIC
- Registered Prefixes
-
121.128.0.0/11 (121.128.0.0 - 121.159.255.255)
121.160.0.0/11 (121.160.0.0 - 121.191.255.255)
These results are partial. Additional registration records were omitted.
| Announced Prefix | Relationship | Origin ASN | Description | Country | First Address | Last Address |
|---|---|---|---|---|---|---|
| 121.128.0.0/10 | Exact | AS4766 | Korea Telecom |
Korea (the Republic of) (KR)
|
121.128.0.0 | 121.191.255.255 |
| 121.128.28.0/23 | More specific | AS4790 | Chosun ilbo Inc. |
Korea (the Republic of) (KR)
|
121.128.28.0 | 121.128.29.255 |
| 121.128.55.0/24 | More specific | AS9647 | Seoul Metropolitan Government |
Korea (the Republic of) (KR)
|
121.128.55.0 | 121.128.55.255 |
| 121.128.97.0/24 | More specific | AS152214 | Korean Air Lines |
Korea (the Republic of) (KR)
|
121.128.97.0 | 121.128.97.255 |
| 121.128.166.0/24 | More specific | AS4790 | Chosun ilbo Inc. |
Korea (the Republic of) (KR)
|
121.128.166.0 | 121.128.166.255 |
| 121.128.219.0/24 | More specific | AS9647 | Seoul Metropolitan Government |
Korea (the Republic of) (KR)
|
121.128.219.0 | 121.128.219.255 |
| 121.128.224.0/23 | More specific | AS38122 | Seoul Guarantee Insurance Company |
Korea (the Republic of) (KR)
|
121.128.224.0 | 121.128.225.255 |
| 121.129.49.0/24 | More specific | AS9776 | KOOKMIN BANK |
Korea (the Republic of) (KR)
|
121.129.49.0 | 121.129.49.255 |
| 121.130.46.0/23 | More specific | AS9684 | HANWHA Corp. Information Service div. |
Korea (the Republic of) (KR)
|
121.130.46.0 | 121.130.47.255 |
| 121.131.7.0/24 | More specific | AS10040 | NICE Information Telecommunication Inc |
Korea (the Republic of) (KR)
|
121.131.7.0 | 121.131.7.255 |
| 121.131.145.0/24 | More specific | AS38126 | Seoul Information Service Inc. |
Korea (the Republic of) (KR)
|
121.131.145.0 | 121.131.145.255 |
| 121.131.216.0/24 | More specific | AS152214 | Korean Air Lines |
Korea (the Republic of) (KR)
|
121.131.216.0 | 121.131.216.255 |
| 121.131.217.0/24 | More specific | AS9856 | WOORI Investment @ Securities |
Korea (the Republic of) (KR)
|
121.131.217.0 | 121.131.217.255 |
| 121.133.126.0/24 | More specific | AS45401 | NICE Information Telecommunication Inc |
Korea (the Republic of) (KR)
|
121.133.126.0 | 121.133.126.255 |
| 121.133.198.0/24 | More specific | AS38394 | Gyeonggido Seongnam Office of Education |
Korea (the Republic of) (KR)
|
121.133.198.0 | 121.133.198.255 |
| 121.133.199.0/24 | More specific | AS38395 | GwangJuHaNam Office of Education |
Korea (the Republic of) (KR)
|
121.133.199.0 | 121.133.199.255 |
| 121.133.203.0/24 | More specific | AS38399 | Gyeonggi-do Yeoju Office of Education |
Korea (the Republic of) (KR)
|
121.133.203.0 | 121.133.203.255 |
| 121.133.209.0/24 | More specific | AS38412 | Gyeonggi-Do Icheon office of Education |
Korea (the Republic of) (KR)
|
121.133.209.0 | 121.133.209.255 |
| 121.134.234.0/24 | More specific | AS18333 | at(Korea Argo-Fisheries Food Trade Corporation) |
Korea (the Republic of) (KR)
|
121.134.234.0 | 121.134.234.255 |
| 121.135.53.0/24 | More specific | AS38697 | Hankyong National Univercity |
Korea (the Republic of) (KR)
|
121.135.53.0 | 121.135.53.255 |
| 121.135.54.0/23 | More specific | AS38697 | Hankyong National Univercity |
Korea (the Republic of) (KR)
|
121.135.54.0 | 121.135.55.255 |
| 121.135.56.0/24 | More specific | AS38697 | Hankyong National Univercity |
Korea (the Republic of) (KR)
|
121.135.56.0 | 121.135.56.255 |
| 121.135.147.0/24 | More specific | AS46002 | PHIS |
Korea (the Republic of) (KR)
|
121.135.147.0 | 121.135.147.255 |
| 121.135.148.0/24 | More specific | AS46002 | PHIS |
Korea (the Republic of) (KR)
|
121.135.148.0 | 121.135.148.255 |
| 121.135.246.0/24 | More specific | AS9696 | Oscar Enterprise |
Korea (the Republic of) (KR)
|
121.135.246.0 | 121.135.246.255 |
| 121.137.87.0/24 | More specific | AS46009 | YABESK |
Korea (the Republic of) (KR)
|
121.137.87.0 | 121.137.87.255 |
| 121.137.88.0/23 | More specific | AS46009 | YABESK |
Korea (the Republic of) (KR)
|
121.137.88.0 | 121.137.89.255 |
| 121.137.90.0/24 | More specific | AS46009 | YABESK |
Korea (the Republic of) (KR)
|
121.137.90.0 | 121.137.90.255 |
| 121.137.94.0/23 | More specific | AS46009 | YABESK |
Korea (the Republic of) (KR)
|
121.137.94.0 | 121.137.95.255 |
| 121.137.96.0/24 | More specific | AS46009 | YABESK |
Korea (the Republic of) (KR)
|
121.137.96.0 | 121.137.96.255 |
| 121.137.105.0/24 | More specific | AS46009 | YABESK |
Korea (the Republic of) (KR)
|
121.137.105.0 | 121.137.105.255 |
| 121.137.106.0/23 | More specific | AS46009 | YABESK |
Korea (the Republic of) (KR)
|
121.137.106.0 | 121.137.107.255 |
| 121.138.29.0/24 | More specific | AS55630 | KSNET.Inc |
Korea (the Republic of) (KR)
|
121.138.29.0 | 121.138.29.255 |
| 121.138.30.0/24 | More specific | AS55630 | KSNET.Inc |
Korea (the Republic of) (KR)
|
121.138.30.0 | 121.138.30.255 |
| 121.138.156.0/24 | More specific | AS9273 | ITCENENTEC CO. LTD. |
Korea (the Republic of) (KR)
|
121.138.156.0 | 121.138.156.255 |
| 121.139.137.0/24 | More specific | AS3786 | LG DACOM Corporation |
Korea (the Republic of) (KR)
|
121.139.137.0 | 121.139.137.255 |
| 121.139.137.0/24 | More specific | AS23591 | LS ITC |
Korea (the Republic of) (KR)
|
121.139.137.0 | 121.139.137.255 |
| 121.140.50.0/24 | More specific | AS55592 | Korea Data Telecommunication Co. Ltd. |
Korea (the Republic of) (KR)
|
121.140.50.0 | 121.140.50.255 |
| 121.140.76.0/24 | More specific | AS9524 | Hyundai Autoever Corp. |
Korea (the Republic of) (KR)
|
121.140.76.0 | 121.140.76.255 |
| 121.140.97.0/24 | More specific | AS9530 | SHINSEGAE I C Co. Ltd. |
Korea (the Republic of) (KR)
|
121.140.97.0 | 121.140.97.255 |
| 121.140.104.0/24 | More specific | AS55592 | Korea Data Telecommunication Co. Ltd. |
Korea (the Republic of) (KR)
|
121.140.104.0 | 121.140.104.255 |
| 121.140.118.0/24 | More specific | AS55592 | Korea Data Telecommunication Co. Ltd. |
Korea (the Republic of) (KR)
|
121.140.118.0 | 121.140.118.255 |
| 121.140.137.0/24 | More specific | AS55592 | Korea Data Telecommunication Co. Ltd. |
Korea (the Republic of) (KR)
|
121.140.137.0 | 121.140.137.255 |
| 121.141.60.0/24 | More specific | AS9526 | KOSCOM |
Korea (the Republic of) (KR)
|
121.141.60.0 | 121.141.60.255 |
| 121.141.101.0/24 | More specific | AS9776 | KOOKMIN BANK |
Korea (the Republic of) (KR)
|
121.141.101.0 | 121.141.101.255 |
| 121.141.229.0/24 | More specific | AS9526 | KOSCOM |
Korea (the Republic of) (KR)
|
121.141.229.0 | 121.141.229.255 |
| 121.143.242.0/24 | More specific | AS9968 | KYOBO Life Insurance Co. Ltd. |
Korea (the Republic of) (KR)
|
121.143.242.0 | 121.143.242.255 |
| 121.144.140.0/22 | More specific | AS9870 | DONG-EUI UNIVERSITY |
Korea (the Republic of) (KR)
|
121.144.140.0 | 121.144.143.255 |
| 121.144.144.0/22 | More specific | AS9870 | DONG-EUI UNIVERSITY |
Korea (the Republic of) (KR)
|
121.144.144.0 | 121.144.147.255 |
| 121.144.148.0/23 | More specific | AS9870 | DONG-EUI UNIVERSITY |
Korea (the Republic of) (KR)
|
121.144.148.0 | 121.144.149.255 |
| 121.144.249.0/24 | More specific | AS18023 | Korea Maritime and Ocean University |
Korea (the Republic of) (KR)
|
121.144.249.0 | 121.144.249.255 |
| 121.144.250.0/24 | More specific | AS18023 | Korea Maritime and Ocean University |
Korea (the Republic of) (KR)
|
121.144.250.0 | 121.144.250.255 |
| 121.150.105.0/24 | More specific | AS17588 | IM Bank |
Korea (the Republic of) (KR)
|
121.150.105.0 | 121.150.105.255 |
| 121.151.96.0/24 | More specific | AS131792 | IM Bank |
Korea (the Republic of) (KR)
|
121.151.96.0 | 121.151.96.255 |
| 121.156.64.0/24 | More specific | AS55593 | netmarble |
Korea (the Republic of) (KR)
|
121.156.64.0 | 121.156.64.255 |
| 121.156.69.0/24 | More specific | AS17834 | WOORICARD |
Korea (the Republic of) (KR)
|
121.156.69.0 | 121.156.69.255 |
| 121.157.0.0/22 | More specific | AS9862 | GORayNet |
Korea (the Republic of) (KR)
|
121.157.0.0 | 121.157.3.255 |
| 121.157.4.0/24 | More specific | AS9862 | GORayNet |
Korea (the Republic of) (KR)
|
121.157.4.0 | 121.157.4.255 |
| 121.157.108.0/24 | More specific | AS9638 | National Agricultural Cooperative federation |
Korea (the Republic of) (KR)
|
121.157.108.0 | 121.157.108.255 |
| 121.157.110.0/23 | More specific | AS9638 | National Agricultural Cooperative federation |
Korea (the Republic of) (KR)
|
121.157.110.0 | 121.157.111.255 |
| 121.160.59.0/24 | More specific | AS9968 | KYOBO Life Insurance Co. Ltd. |
Korea (the Republic of) (KR)
|
121.160.59.0 | 121.160.59.255 |
| 121.160.71.0/24 | More specific | AS9647 | Seoul Metropolitan Government |
Korea (the Republic of) (KR)
|
121.160.71.0 | 121.160.71.255 |
| 121.162.108.0/24 | More specific | AS9843 | NHINFORMATIONSYSTEM |
Korea (the Republic of) (KR)
|
121.162.108.0 | 121.162.108.255 |
| 121.162.123.0/24 | More specific | AS38089 | kbank |
Korea (the Republic of) (KR)
|
121.162.123.0 | 121.162.123.255 |
| 121.162.154.0/23 | More specific | AS17859 | NICEINFOMATIONSERVICE |
Korea (the Republic of) (KR)
|
121.162.154.0 | 121.162.155.255 |
| 121.163.173.0/24 | More specific | AS38431 | KB Insurance |
Korea (the Republic of) (KR)
|
121.163.173.0 | 121.163.173.255 |
| 121.163.175.0/24 | More specific | AS38431 | KB Insurance |
Korea (the Republic of) (KR)
|
121.163.175.0 | 121.163.175.255 |
| 121.163.204.0/24 | More specific | AS38415 | Guri Namyangju Office Of Education |
Korea (the Republic of) (KR)
|
121.163.204.0 | 121.163.204.255 |
| 121.163.255.0/24 | More specific | AS38392 | KYONGGI YANGPYEONG OFFICE OF EDUCATION |
Korea (the Republic of) (KR)
|
121.163.255.0 | 121.163.255.255 |
| 121.164.116.0/24 | More specific | AS9778 | DAEJIN UNIVERSITY |
Korea (the Republic of) (KR)
|
121.164.116.0 | 121.164.116.255 |
| 121.168.9.0/24 | More specific | AS9684 | HANWHA Corp. Information Service div. |
Korea (the Republic of) (KR)
|
121.168.9.0 | 121.168.9.255 |
| 121.168.251.0/24 | More specific | AS23582 | Doosan Corporation Digital Innovation |
Korea (the Republic of) (KR)
|
121.168.251.0 | 121.168.251.255 |
| 121.168.252.0/22 | More specific | AS23582 | Doosan Corporation Digital Innovation |
Korea (the Republic of) (KR)
|
121.168.252.0 | 121.168.255.255 |
| 121.169.210.0/24 | More specific | AS10167 | HANVIT BANK |
Korea (the Republic of) (KR)
|
121.169.210.0 | 121.169.210.255 |
| 121.170.142.0/24 | More specific | AS9530 | SHINSEGAE I C Co. Ltd. |
Korea (the Republic of) (KR)
|
121.170.142.0 | 121.170.142.255 |
| 121.170.147.0/24 | More specific | AS55592 | Korea Data Telecommunication Co. Ltd. |
Korea (the Republic of) (KR)
|
121.170.147.0 | 121.170.147.255 |
| 121.170.176.0/22 | More specific | AS9530 | SHINSEGAE I C Co. Ltd. |
Korea (the Republic of) (KR)
|
121.170.176.0 | 121.170.179.255 |
| 121.170.204.0/24 | More specific | AS45382 | Hostcenter |
Korea (the Republic of) (KR)
|
121.170.204.0 | 121.170.204.255 |
| 121.171.150.0/24 | More specific | AS9530 | SHINSEGAE I C Co. Ltd. |
Korea (the Republic of) (KR)
|
121.171.150.0 | 121.171.150.255 |
| 121.172.146.0/24 | More specific | AS38093 | HANATI |
Korea (the Republic of) (KR)
|
121.172.146.0 | 121.172.146.255 |
| 121.174.50.0/24 | More specific | AS9708 | Pukyong National University |
Korea (the Republic of) (KR)
|
121.174.50.0 | 121.174.50.255 |
| 121.174.96.0/24 | More specific | AS9708 | Pukyong National University |
Korea (the Republic of) (KR)
|
121.174.96.0 | 121.174.96.255 |
| 121.175.28.0/24 | More specific | AS38087 | BUSANBANK |
Korea (the Republic of) (KR)
|
121.175.28.0 | 121.175.28.255 |
| 121.177.31.0/24 | More specific | AS38427 | FORCETEC Co. LTD. |
Korea (the Republic of) (KR)
|
121.177.31.0 | 121.177.31.255 |
| 121.178.209.0/24 | More specific | AS38681 | Jeollanamdo Educational Research Information Institute |
Korea (the Republic of) (KR)
|
121.178.209.0 | 121.178.209.255 |
| 121.181.196.0/24 | More specific | AS38696 | Korea Brain Research Institute |
Korea (the Republic of) (KR)
|
121.181.196.0 | 121.181.196.255 |
| 121.184.184.0/22 | More specific | AS38105 | SOON CHUN HYANG UNIVERSITY |
Korea (the Republic of) (KR)
|
121.184.184.0 | 121.184.187.255 |
| 121.184.188.0/23 | More specific | AS38105 | SOON CHUN HYANG UNIVERSITY |
Korea (the Republic of) (KR)
|
121.184.188.0 | 121.184.189.255 |
| 121.184.192.0/21 | More specific | AS38105 | SOON CHUN HYANG UNIVERSITY |
Korea (the Republic of) (KR)
|
121.184.192.0 | 121.184.199.255 |
| 121.184.200.0/23 | More specific | AS38105 | SOON CHUN HYANG UNIVERSITY |
Korea (the Republic of) (KR)
|
121.184.200.0 | 121.184.201.255 |
| 121.185.13.0/24 | More specific | AS18169 | MEMC Korea |
Korea (the Republic of) (KR)
|
121.185.13.0 | 121.185.13.255 |
| 121.187.23.0/24 | More specific | AS55615 | DOUZONEBIZON |
Korea (the Republic of) (KR)
|
121.187.23.0 | 121.187.23.255 |
| 121.187.64.0/20 | More specific | AS17862 | Kangwon National University |
Korea (the Republic of) (KR)
|
121.187.64.0 | 121.187.79.255 |
| 121.187.80.0/22 | More specific | AS17862 | Kangwon National University |
Korea (the Republic of) (KR)
|
121.187.80.0 | 121.187.83.255 |
| 121.187.84.0/23 | More specific | AS17862 | Kangwon National University |
Korea (the Republic of) (KR)
|
121.187.84.0 | 121.187.85.255 |
| 121.189.167.0/24 | More specific | AS55622 | CNUE |
Korea (the Republic of) (KR)
|
121.189.167.0 | 121.189.167.255 |
| 121.189.168.0/22 | More specific | AS55622 | CNUE |
Korea (the Republic of) (KR)
|
121.189.168.0 | 121.189.171.255 |
| 121.190.174.0/24 | More specific | AS3786 | LG DACOM Corporation |
Korea (the Republic of) (KR)
|
121.190.174.0 | 121.190.174.255 |
| 121.190.174.0/24 | More specific | AS23591 | LS ITC |
Korea (the Republic of) (KR)
|
121.190.174.0 | 121.190.174.255 |
| 121.190.208.0/23 | More specific | AS45399 | Hanjin Information Systems Telecommunication Co. Ltd |
Korea (the Republic of) (KR)
|
121.190.208.0 | 121.190.209.255 |
| 121.190.250.0/24 | More specific | AS38391 | Gyeonggi provincial gimpo office of education |
Korea (the Republic of) (KR)
|
121.190.250.0 | 121.190.250.255 |
| 121.190.251.0/24 | More specific | AS38404 | Gyeonggi Provincial Bucheon Office of Education |
Korea (the Republic of) (KR)
|
121.190.251.0 | 121.190.251.255 |
Showing the first 100 announced prefixes. Additional more-specific announcements were omitted.