Hello
I googled the 604  as well and got Biscom so called their 888 number . They also offer a faxing service but he looked up the number and directed mt to this page

The number did not belong to any of his clients

so it is now two differwnt companies.  Lol,lol

WEll it is all a scam. This same thing happened to me last month a different number and I googled it and came up scam

So this is as well

I was harassed for months by this number.  You could not fax back and you could not call the number. Phone company would not change my number without charging me. I was unable to actually block the number.  So I had to get a fax machine and hook it up to my home phone. I finally got them! I was being harassed by a DVM service. They have a contact number of +1 888-675-9765. I called it immediately and had my number removed.  There is also a number to call if you have the Reference ID that is actually on the fax that you can call and it is automated. You have to be able to receive the fax in order to get that.  I am hoping that I have resolved this once and for all.  It is very annoying when it happens at all times of the day and NIGHT!  And not just once - they have it set for auto-redial! Good luck everyone!

I was harassed for months by this number.  You could not fax back and you could not call the number. Phone company would not change my number without charging me. I was unable to actually block the number.  So I had to get a fax machine and hook it up to my home phone. I finally got them! I was being harassed by a DVM service. They have a contact number of +1 888-675-9765. I called it immediately and had my number removed.  There is also a number to call if you have the Reference ID that is actually on the fax that you can call and it is automated. You have to be able to receive the fax in order to get that.  I am hoping that I have resolved this once and for all.  It is very annoying when it happens at all times of the day and NIGHT!  And not just once - they have it set for auto-redial!
Good luck everyone!

google the number

the company's number is posted

dont bother telling them to stop...just keep harrassing them till they stop

dats all u can do...dats what i did

Thanks Bill.... I'm going to do the same thing because they're driving me nuts.