does alpaca have all of the delisted tickers?
in order to obtain the historical data, i call the get assets endpoint and then perform an historical request? or i need to use the asof parameter?
what is going on with the tickers that are just numbers?
Hi 
Unfortunately at the moment we do not have an endpoint for historical assets. We’re planning to introduce one possibly with an asof parameter in the future.
@Super_Richman You asked “what is going on with the tickers that are just numbers?” Fundamentally, the asset table is a list of assets which can or do appear in Alpaca client accounts. Alpaca uses this internally to look up names when generating monthly statements, symbols to then get pricing, check whether an asset is tradable, etc. Accounts can end up with many types of assets other than those which are the result of an order. For example, a company issues a non-tradable “right” as a dividend. Since it’s not tradable, it will not be issued a symbol so Alpaca uses the CUSIP or generates a random number. Another example is a stock which becomes de-listed. The original symbol is no longer valid, so Alpaca will replace the symbol with a number, or more typically, append a suffix to the symbol. It’s these non-tradable assets which may have a number or something else in the symbol field simply as an internal identifier.
cool dan thanks
were these “numbers” entities tradeable at point in time in the past?