| Relationships | Role | Relationship Start | Relationship End |
| Bangkok E'service Ltd. | Parent | 8/1/1998 | 8/31/2001 |
| Bangkok E'service Ltd. | Parent | 5/1/1997 | 1/30/1998 |
| Bangkok E'service Ltd. | Parent | 10/1/1994 | 12/30/1996 |
| Relationships | Role | Relationship Start | Relationship End |
| Bangkok E'service Ltd. | Parent | 8/1/1998 | 8/31/2001 |
| Bangkok E'service Ltd. | Parent | 5/1/1997 | 1/30/1998 |
| Bangkok E'service Ltd. | Parent | 10/1/1994 | 12/30/1996 |