I had a customer questioning why some of the Alpha Wire they received had UL and CSA marking on the wire and some didn’t for the same part number Digikey part number A2101L-100-ND.
If you look closely at the Spec Sheet link - Hook Up Wire | 3071 | Alpha Wire it states, [Note: Product may have c(UL) or CSA markings depending upon plant of manufacture.]
If you have further questions, or absolutely need the wire with markings, please state that at the time of order.