South Korea
IP address space, AS numbers and the largest networks registered in South Korea, based on the delegation records of the regional internet registries.
IPv4 addresses
103.3M
2,387 blocks
IPv6 allocations
183
AS numbers
1,183
Routed AS numbers
917
Largest networks in South Korea
By announced prefixes| AS | Name | IPv4 prefixes | IPv6 prefixes |
|---|---|---|---|
| AS4766 | KIXS-AS-KR-KR Korea Telecom | 2,628 | 47 |
| AS17853 | LGTELECOM-AS-KR-KR LGTELECOM | 349 | 1,042 |
| AS3786 | LGDACOM-KR LG DACOM Corporation | 882 | 57 |
| AS9318 | SKB-AS-KR SK Broadband Co Ltd | 843 | 3 |
| AS17841 | NCIA-AS-KR-KR NATIONAL INFORMATION RESOURCES SERVICE | 663 | 0 |
| AS10036 | CNM-AS-KR-KR DLIVE | 478 | 0 |
| AS45400 | NICNET-KR Korea Telecom | 408 | 0 |
| AS4670 | HYUNDAI-KR Shinbiro | 405 | 0 |
| AS45974 | NHN-AS-KR-KR NHNCLOUD | 369 | 0 |
| AS9845 | CJCKN-AS-KR-KR LG HelloVision Corp. | 316 | 0 |
| AS9569 | HCNSEOCHOCATV-AS-KR-KR SEOCHO CABLE SYSTEMS CO., LTD. | 306 | 0 |
| AS23584 | HYROADPUSAN-AS-KR-KR PUSAN CABLE TV SYSTEM CO., LTD. | 283 | 0 |
| AS18300 | KEPRI-AS-KR-KR KEPCO | 275 | 0 |
| AS17857 | SKB-NAKDONGDIGITALBUSANNET-AS-KR-KR SK Broadband Co Ltd | 244 | 0 |
| AS9848 | SejongTelecom-AS-KR-KR SEJONG NETWORKS | 224 | 2 |
| AS17858 | POWERVIS-AS-KR-KR LG POWERCOMM | 218 | 0 |
| AS1237 | KREONET-AS-KR-KR KISTI | 212 | 1 |
| AS9286 | KINXIDC-AS-KR-KR KINX | 209 | 2 |
| AS38676 | FLEXNET-AS-KR-KR flexnetworks | 209 | 0 |
| AS17598 | YBNTV-AS-KR-KR LG HelloVision Corp. | 209 | 0 |
| AS9319 | HCNCHUNGJU-AS-KR-KR HCN CHUNGBUK CABLE TV SYSTEMS | 204 | 0 |
| AS17849 | SKB-GINAMHANVIT-AS-KR-KR SK Broadband Co Ltd | 196 | 0 |
| AS23563 | SKB-VITSSEN-SUWON-AS-KR-KR SK Broadband Co Ltd | 196 | 0 |
| AS138195 | MOACKCOLTD-AS-AP MOACK.Co.LTD | 187 | 4 |
| AS9952 | HOSTWAY-AS-KR-KR Hostway IDC | 174 | 0 |
| AS23576 | nhn-AS-KR-KR NAVER Cloud Corp. | 168 | 0 |
| AS38120 | GBNTV-AS-KR-KR LG HelloVision Corp. | 165 | 0 |
| AS9689 | SKB-FCABLE-AS-KR SK Broadband Co Ltd | 164 | 0 |
| AS9528 | CBE-AS-KR-KR Chungcheongbuk-do Education Research and Information Institute | 155 | 0 |
| AS17589 | GABIA-AS-KR-KR GABIA Inc. | 144 | 0 |
Delegations by registry: APNIC 2,557, RIPE 8, ARIN 5. Updated 2026-10-06.