based on your ip and return AWS region string, get aws region by ip, find aws region

getMyAWSRegion.js

const fs = require('fs')
const path = require('path')
const { execSync } = require('child_process')
const ipRangeCheck = require("ip-range-check")

const getMyAWSRegion = () => {
  const ip = execSync('curl https://api.ipify.org -s').toString()

  const awsIPFile = path.join(process.env.TMP, "ip-ranges.json")
  execSync(`curl -o ${awsIPFile} https://ip-ranges.amazonaws.com/ip-ranges.json`).toString()

  const awsIPs = JSON.parse(fs.readFileSync(awsIPFile))['prefixes'] || []

  const targets = awsIPs.filter(e => ipRangeCheck(ip, e['ip_prefix'])) || []

  if (targets.length > 0) {
    return targets[0]['region']
  }

  return 'ap-southeast-1'
}