951-000-2145

Just says California Call, ring three times hang up. Called Back no answer.

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
619-279-1287        708-417-2636        949-527-1674
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
The source of your number on their list seems to be from the 3 Credit Bureaus and the Direct Marketing Association. Credi Card Services buys a marketing list from the Credit Bureaus and DMA then harvests contact names and phone numbers from this list. They can not 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 also use the call blocking feature of my wireless carrier to block calls from Credit Car Service. every day I add new numbers to block from this company.

unknown solicitation, i did not answer it