Answer:
short term memory
Explanation:
Short term memory refers to the memory that exist for a short span of time. Such memories are stored and active for a short period. These memories are the result of the information that are currently stored and are a result of the active sensory memories. Short term memories are subject to few seconds and can be stored for some seconds only.
In the given excerpt, Aarav has stored the memory of Dante's phone number in his short term memory. For some seconds he was able to recall them, but after a while it was blurred from his mind.