Doing multiple fetch not working React native - react-native

Question

I'm doing a network scanner in react-native,
The problem is my api request are working but not in the for loop,
if I just made a for loop with 30loop its ok, but if I got more than 30loops
nothing is working.
if the IP to find is 192.168.1.79
and I set num_two to 60 and num_one to 1, this work good.
But if I set num_two to 50 and num_one to 1, this isn't working anymore.
My searching function:
searchInNetwork(net) {
return new Promise(async (resolve, reject) => {
for (let num_one = 1 ; num_one < 255 ; num_one++) {
let reseau = net + String(num_one);
for (let num_two = 50 ; num_two < 255 ; num_two++) {
let url = 'http://' + reseau + '.' + String(num_two) + ':3000/connect';
await ApiService.getRequest(url, 100)
.then((data) => {
console.log("SUCCESS");
ApiService.url = 'http://' + reseau + '.' + String(num_two) + ':3000';
ApiService.connected = true;
resolve();
})
` .catch((error) => {
if (url === "http://192.168.1.79:3000/connect")
console.log(error);
})
}
}
});
}
My ApiService class:
class ApiService {
static url = 'http://0.0.0.0:3000';
static connected = false;
static getUrl() {
return (this.url);
}
static getRequest(route, timeout) {
return new Promise(async (resolve, reject) => {
fetch(route)
.then((response) => response.json())
.then((responseJson) => {
ApiService.connected = true;
resolve(responseJson);
})
.catch((error) => {
ApiService.connected = false;
reject(error);
});
if (timeout) {
const error = new Error("Timeout net");
setTimeout(reject, timeout, error);
}
});
};
};
module.exports = ApiService;