IP List distribution Introduction To Modern Physics, total 4
| IP | Country | City | ISP |
|---|---|---|---|
| 115.41.164.156 | Republic of Korea | Seoul | CJ Hello Internet |
| 121.66.178.202 | Republic of Korea | Seoul | LG DACOM Corporation |
| 124.58.228.16 | Republic of Korea | Lg Powercomm | |
| 14.58.20.184 | Republic of Korea | Korea Telecom |