I have received this call several times on my home and cell phones.  I requested they contact me after work hours but never receive the call.  I tried calling them back at this number but it says phone out of service.  They are using different numbers.  I believe this is SPAM.

This company calls numerous times and hangs up.  I tried calling the number back and got a recording.  Never leaves a message.

SCAM ALERT!!!  
From what I have been able to put together on calls from Credit Card Services or a like named company, they use a Robo caller from numbers like the ones below:
302-394-9659        281-217-0241        503-457-1102        520-301-4398
619-279-1287        708-417-2636        949-527-1674        386-202-2002
213-791-8623        610-606-4600        773-449-5041
316-789-1356        832-457-4063        503-468-5545
212-249-2549        800-847-2900        480-359-4336
773-449-5058        951-000-2145        512-247-8202
The source of your number on their list seems to be from the 3 Credit Bureaus and the Direct Marketing Association. Credit Card Services buys a marketing list from the Credit Bureaus and DMA then harvests contact names and phone numbers from this list. They cannot get account numbers on the list, but you are on the marketing lists if you have some kind of credit to be listed (Home loans, credit cards, phone bills, electric bills, cell phone bills, etc).
You can opt out of the marketing list with the Credit Bureaus, it takes a month or so to take effect. To do it, log onto:
https://www.optoutprescreen.com/
To opt-out of telemarketing calls:
Responsible marketing companies respect your choice to not receive telemarketing calls. DMA members, as a condition of membership, are required to suppress the phone numbers of individuals who have notified the DMA that they do not want to receive telemarketing calls.
If you would like to opt out of telemarketing calls, send your complete name, address and telephone number to:
DMA Telephone Preference Service
P.O. Box 1559
Carmel, NY 10512
As a DMA member, Experian subscribes to and suppresses any phone number on the DMA's Telephone Preference Service file from its telemarketing lists.
Contact the Credit Bureaus (google search) and use the Bureaus websites, to Opt-out.

I use the call blocking feature of my wireless carrier to block these calls. I add new numbers to my blocked number list daily.

Received a call from this number at 11:31 a.m. Eastern Time. I didn't answer.

I keep getting these calls on my cell.  When I answer no one says anything sounds like they are just holding the line.  Makes me wonder if they are trying to use my number or something