| S.I No | Name of Lines/Boundaries | Between |
| 1 | 20th Parallel | Libya and Sudan |
| 2 | 17th Parallel | South Vietnam and North Vietnam |
| 3 | Blue Line | Lebanon and Israel |
| 4 | Green Line / Attila Line / UN Buffer Zone | The Republic of Cyprus and Turkish Cyprus |
| 5 | Siegfried Line | France and Germany |
| 6 | Radcliffe Line | India and Pakistan |
| 7 | Mannerheim Line | Russia and Finland |
| 8 | Oder-Neisse Line | Poland and Germany |
| 9 | McMahon Line | China and India |
| 10 | Hindenburg Line | Poland and Germany |
| 11 | 49th Parallel | The USA and Canada |
| 12 | Durand Line | Pakistan and Afghanistan |
| 13 | 31st Parallel | Iran and Iraq |
| 14 | 38th Parallel | South Korea and North Korea |
| 15 | 49th Parallel | The USA and Canada |
| 16 | 22nd Parallel | Egypt and Sudan |
| 16 | 25th Parallel | Mauritania and Mali |