const cidrTools = require("cidr-tools");
const ping = require("ping");

const hosts = cidrTools.expand("10.0.1.0/24");
const alive = [];

Promise.all(
  hosts.map(host => {
      ping.promise.probe(host).then((res) => {
          if (res.alive) {
              console.log(res.host)
        }
    });
  })
);

console.log(alive);
console.log(`done`);

// Result
[]
done
10.0.1.196
10.0.1.192
10.0.1.187
10.0.1.153
10.0.1.150
10.0.1.138
10.0.1.25
10.0.1.20
10.0.1.14
10.0.1.13
10.0.1.12
10.0.1.11
10.0.1.10
10.0.1.1