Whoever this character was, he/she/they let the phone ring sufficiently for the answering machine to start. Just silence and then nothing. Probably some jerk telemarketer or spammer. One of Google's hits indicated it's a cell phone.
Scammer. Blocked. Will not be bothering me again and I'm sending my worst Karma their way. They will have flat tires, unexpected bills, wage garnishes, flea infestations and chicken pox.