I have read through this question, but for Discover card, the starting digits are 6011, 622126-622925, 644-649, 65 instead of just 6011, 65. (Source)

For Discover cards, I picked up this regex from that question ^6(?:011|5[0-9]{2})[0-9]{12}$

I modified it to cover 6011, 644-649& 65 but for 622126-622925, building regex is hard cuz of my poor regex skills.

I have this regex so far 6(?:011|5[0-9]{2}|[4][4-9][0-9]|[2]{2}[1-9])[0-9]{2}$, but it only checks for 622[1-9]**.

How do I modify it so that it accepts only between 622126-622925 for 622*** case?

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