Every character on Jiǎoluò Shūwū read as da in any tone — 2 readings total across the four tones. Pick the tone you mean.
If you have the sound da but not the character, here are the 2 characters read this way: 打 (dǎ, to hit, to strike; the most versatile verb in Mandarin), 大 (dà, big, great, large). They split across 2 tones, so the tone is what separates them.