番号をまちがえじゃありませんか。

number; series of digits

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to make a mistake; to be incorrect; to be mistaken

then; well; so; well then; combination of 'de' and 'wa' particles; plain copula

indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way