It depends. In careful speech, the d is pronounced but hard to hear. In reduced speech, the d is often dropped.
Think about these examples. In careful speech, a native speaker has no trouble distinguishing "I phone Tom" from "I phoned Tom."
I phone Tom every day.
When he was sick, I phoned Tom every day.
I phone Tom [aɪ foʊn tɑm]
I phoned Tom [aɪ foʊnd tɑm]
The [d] in "I phoned Tom" is is present but hard to hear because it is unreleased.
More generally, sounds that stop the air flow [pbtdkg] are hard to hear when followed by another sound that stops the air flow. Consider "Stop pushing me!" when said quickly.
There is the additional complication that a d or t is often deleted in reduced speech when in the middle of a consonant cluster. "blind man" sounds like "blin- man."