delisted un- is a prefix for adjectives, not verbs. e.g. Bob decrypted the message and set it to Alice as unencrypted plain-text. Unlisted numbers are less

delisted un- is a prefix for adjectives, not verbs. e.g. Bob decrypted the message and set it to Alice as unencrypted plain-text. Unlisted numbers are less prone to robo-calling, but most phone companies charge a fee for delisting a number.