Every character on Jiǎoluò Shūwū read as tong in any tone — 2 readings total across the four tones. Pick the tone you mean.
If you have the sound tong but not the character, here are the 2 characters read this way: 通 (tōng, to go through; to connect; general; fluent), 同 (tóng, same, together, with). They split across 2 tones, so the tone is what separates them.