That is, to validate the card number as entered.

Visa Card
^4[0-9]{12}(?:[0-9]{3})?$^5[1-5][0-9]{14}$


Amex Card
^3[47][0-9]{13}$


Carte Blanche Card
^389[0-9]{11}$


Diners Club Card
^3(?:0[0-5]|[68][0-9])[0-9]{11}$


Discover Card
^65[4-9][0-9]{13}|64[4-9][0-9]{13}|6011[0-9]{12}|(622(?:12[6-9]|1[3-9][0-9]|[2-8][0-9][0-9]|9[01][0-9]|92[0-5])[0-9]{10})$


JCB Card
^(?:2131|1800|35\d{3})\d{11}$


Visa Master Card
^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14})$


Insta Payment Card
^63[7-9][0-9]{13}$


Laser Card
^(6304|6706|6709|6771)[0-9]{12,15}$


Maestro Card
^(5018|5020|5038|6304|6759|6761|6763)[0-9]{8,15}$


Solo Card
^(6334|6767)[0-9]{12}|(6334|6767)[0-9]{14}|(6334|6767)[0-9]{15}$


Switch Card
^(4903|4905|4911|4936|6333|6759)[0-9]{12}|(4903|4905|4911|4936|6333|6759)[0-9]{14}|(4903|4905|4911|4936|6333|6759)[0-9]{15}|564182[0-9]{10}|564182[0-9]{12}|564182[0-9]{13}|633110[0-9]{10}|633110[0-9]{12}|633110[0-9]{13}$


Union Pay Card
^(62[0-9]{14,17})$


KoreanLocalCard
^9[0-9]{15}$


BCGlobal
^(6541|6556)[0-9]{12}$