The present invention relates to a telecommunications apparatus and a method, a storage medium, and a program for determining whether or not the other side communicating content data is located on a LAN or across a WAN. In step S13, the difference between a counter value in a received check packet and a value in a register is computed. In step S14, the resultant difference is checked to determine if it is equal to a constant value X. If it is determined that the difference is equal to the constant value X, the counter value in the packet is stored in the register in step S15. In step S16, it is determined whether or not all the predetermined number of check packets is received. If all the predetermined number of check packets is received, it is determined that the communication takes place over a LAN connection in step S17. If, in step S14, it is determined that the difference is not equal to the constant value X, it is determined that the communication takes place across a WAN connection in step S18. The present invention can be applied to a personal computer on a wireless LAN.