Vietnamese phone number Regex validation

regex-vietnamese-phone-number-updated-2018.js

/*
Before Septemper 15 2018, Vietnam has phone number start with 09*, 01(2|6|8|9).
After that, the phone number can start with 03, 05, 07 or 08.
So this function provide a way to validate the input number is a Vietnamese phone number
*/

function isVietnamesePhoneNumber(number) {
  return /(03|05|07|08|09|01[2|6|8|9])+([0-9]{8})\b/.test(number);
}

Updated: 20/10/2021
My regex:

const isValidPhone = phone => /^(0?)(3[2-9]|5[6|8|9]|7[0|6-9]|8[0-6|8|9]|9[0-4|6-9])[0-9]{7}$/.test(phone)

Updated: 13/09/2022

const isValidPhone = phone => /(([03+[2-9]|05+[6|8|9]|07+[0|6|7|8|9]|08+[1-9]|09+[1-4|6-9]]){3})+[0-9]{7}\b/g.test(phone)

isValidPhone('783728642364287323437894534')
> true

Cảm ơn anh!

Thanks anh

Cảm ơn anh ^^