| 1.0.0.0/8 | WHOIS (APNIC) | Asia Pacific Network Information Center, Pty. Ltd. | AU |
| 1.224.0.0/11 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.240.0.0/12 | WHOIS (APNIC) | SK Broadband Co Ltd | KR |
| 1.240.0.0/12 | APNIC assigned | — | KR |
| 1.240.0.0/13 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.248.0.0/13 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.247.196.0/22 | BGP route | AS55625 Chungwoon University | — |
| 1.255.48.0/22 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.52.0/22 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.56.0/22 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.60.0/22 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.240.224.0/23 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.247.194.0/23 | BGP route | AS55625 Chungwoon University | — |
| 1.247.200.0/23 | BGP route | AS55625 Chungwoon University | — |
| 1.249.108.0/23 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.250.154.0/23 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.255.48.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.50.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.52.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.54.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.56.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.58.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.60.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.255.62.0/23 | BGP route | AS23576 NAVER Cloud Corp. | — |
| 1.240.0.0/24 | BGP route | AS38415 Guri Namyangju Office Of Education | — |
| 1.241.0.0/24 | BGP route | AS38408 GYEONGGI PROVINCIAL ANYANG OFFICE OF EDUCATION | — |
| 1.241.1.0/24 | BGP route | AS38408 GYEONGGI PROVINCIAL ANYANG OFFICE OF EDUCATION | — |
| 1.241.2.0/24 | BGP route | AS38403 GunpoUiwang Office of Education | — |
| 1.241.3.0/24 | BGP route | AS38403 GunpoUiwang Office of Education | — |
| 1.241.193.0/24 | BGP route | AS131802 NongHyup Life Insurance | — |
| 1.241.229.0/24 | BGP route | AS9638 National Agricultural Cooperative federation | — |
| 1.241.248.0/24 | BGP route | AS9638 National Agricultural Cooperative federation | — |
| 1.241.251.0/24 | BGP route | AS9766 SHINHAN LIFE INSURANCE CO.,LTD. | — |
| 1.242.4.0/24 | BGP route | AS38407 Gyeonggi-Do Ansan Office of Education | — |
| 1.242.5.0/24 | BGP route | AS38407 Gyeonggi-Do Ansan Office of Education | — |
| 1.242.7.0/24 | BGP route | AS38414 Gyeonggi siheung office of education | — |
| 1.242.180.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.181.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.182.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.183.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.185.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.194.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.195.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.211.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.242.247.0/24 | BGP route | AS9318 SK Broadband Co Ltd | — |
| 1.244.114.0/24 | BGP route | AS55615 DOUZONEBIZON | — |
| 1.244.115.0/24 | BGP route | AS55615 DOUZONEBIZON | — |
| 1.244.116.0/24 | BGP route | AS55615 DOUZONEBIZON | — |
| 1.244.117.0/24 | BGP route | AS55615 DOUZONEBIZON | — |
| 1.244.118.0/24 | BGP route | AS55615 DOUZONEBIZON | — |
| 1.244.192.0/24 | BGP route | AS55615 DOUZONEBIZON | — |
| 1.244.193.0/24 | BGP route | AS55615 DOUZONEBIZON | — |
| 1.244.194.0/24 | BGP route | AS55615 DOUZONEBIZON | — |