const regex = /^5[1-5]\d{14}$|^2(?:2(?:2[1-9]|[3-9]\d)|[3-6]\d\d|7(?:[01]\d|20))\d{12}$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^5[1-5]\\d{14}$|^2(?:2(?:2[1-9]|[3-9]\\d)|[3-6]\\d\\d|7(?:[01]\\d|20))\\d{12}$', 'gm')
const str = `1221009999999999
2121009999999999
2211009999999999
2220009999999999
2221009999999999
2321009999999999
2499999999999999
2720999999999999
2721009999999999
2721999999999999
2730999999999999
2820999999999999
4111111111111111
5055555555555555
5100000000000000
5255555555555555
5444444444444444
5555555555555555
5600000000000000
5911111111111111`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions