Who called from 6466934014

Who is calling me?

I just got a call from the same number. I answered it said hello and whatnot and a good three to five seconds passed and it hung up

This is definitely a collection's agency number.  Ext: 22000 was on their voicemail.

Another site checked said Nationwide Recovery Systems. On same site, 4 others listed # as spam.

Voice mail message: Hello, then 9 seconds of silence.