# Testing SIM Swap with Magic Numbers > \[!WARNING] > > Please review the [Magic Numbers for Lookup](/docs/lookup/magic-numbers-for-lookup) and use your testing credentials for the correct Region when testing phone numbers. If you use your production credentials then the phone numbers do not display the correct responses shown below. > > Note: Your testing credentials are region specific so make sure you have selected the region you want to test in the top right corner of the [Auth Tokens page of your Console](https://console.twilio.com/us1/account/keys-credentials/api-keys?frameUrl=%2Fconsole%2Fproject%2Fapi-keys%3Fx-target-region%3Dus1) before testing phone numbers. ## SIM Swap Magic Numbers These phone numbers have simulated information for the following inputs which is for testing the [SIM Swap](/docs/lookup/v2-api/sim-swap) feature. Testing SIM Swap with Magic Numbers works just like SIM Swap in Production and only requires you to submit the phone number with your query. *Note: These phone numbers are examples only and do not include real time data.* ### Below are the Magic Numbers for SIM Swap, along with their Inputs/Outputs: These phone number examples show the inputs (phone numbers) and their outputs (LastSimSwapDate, SwappedPeriod and SwappedinPeriod). | Phone Number | LastSimSwapDate | SwappedPeriod | SwappedInPeriod | | -------------- | ---------------------- | ------------- | --------------- | | +12345678900 | null | PT48H | FALSE | | +12345678901 | null | PT24H | FALSE | | +12345678904 | null | PT48H | FALSE | | +12345678907 | null | PT24H | FALSE | | +12345678924 | null | PT24H | TRUE | | +441234567890 | "2018-07-25T11:47:40Z" | PT48H | FALSE | | +491534567890 | "2018-07-25T11:47:40Z" | PT48H | FALSE | | +3933444567890 | null | PT48H | FALSE | | +31223456780 | "2018-07-25T11:47:40Z" | PT48H | FALSE | | +34712345670 | "2018-07-25T11:47:40Z" | PT48H | FALSE | | +551234567890 | null | PT48H | FALSE | | +573394567890 | null | PT48H | FALSE | | +441234567891 | "2020-04-27T10:18:50Z" | PT48H | TRUE | | +491534567891 | "2020-04-27T10:18:50Z" | PT48H | TRUE | | +3933444567891 | null | PT48H | TRUE | | +31223456781 | "2020-04-27T10:18:50Z" | PT48H | TRUE | | +34712345671 | "2020-04-27T10:18:50Z" | PT48H | TRUE | | +551234567891 | null | PT48H | TRUE | | +573394567891 | null | PT48H | TRUE | These phone number examples show different types of errors when using SIM Swap. | Phone Number | Error Code | | ------------ | ------------------------------- | | +12345678905 | [60004](/docs/api/errors/60004) | | +12345678906 | [60005](/docs/api/errors/60005) | | +12345678909 | [60008](/docs/api/errors/60008) | | +12345678910 | [60601](/docs/api/errors/60601) | | +12345678911 | [60606](/docs/api/errors/60606) | | +12345678912 | [60608](/docs/api/errors/60608) | | +12345678913 | [60614](/docs/api/errors/60614) | | +12345678915 | [60619](/docs/api/errors/60619) | | +12345678916 | [60620](/docs/api/errors/60620) | SIM Swap Lookup ```js // Download the helper library from https://www.twilio.com/docs/node/install const twilio = require("twilio"); // Or, for ESM: import twilio from "twilio"; // Find your Account SID and Auth Token at twilio.com/console // and set the environment variables. See http://twil.io/secure const accountSid = process.env.TWILIO_ACCOUNT_SID; const authToken = process.env.TWILIO_AUTH_TOKEN; const client = twilio(accountSid, authToken); async function fetchPhoneNumber() { const phoneNumber = await client.lookups.v2 .phoneNumbers("+447772000001") .fetch({ fields: "sim_swap" }); console.log(phoneNumber.simSwap); } fetchPhoneNumber(); ``` ```python # Download the helper library from https://www.twilio.com/docs/python/install import os from twilio.rest import Client # Find your Account SID and Auth Token at twilio.com/console # and set the environment variables. See http://twil.io/secure account_sid = os.environ["TWILIO_ACCOUNT_SID"] auth_token = os.environ["TWILIO_AUTH_TOKEN"] client = Client(account_sid, auth_token) phone_number = client.lookups.v2.phone_numbers("+447772000001").fetch( fields="sim_swap" ) print(phone_number.sim_swap) ``` ```csharp // Install the C# / .NET helper library from twilio.com/docs/csharp/install using System; using Twilio; using Twilio.Rest.Lookups.V2; using System.Threading.Tasks; class Program { public static async Task Main(string[] args) { // Find your Account SID and Auth Token at twilio.com/console // and set the environment variables. See http://twil.io/secure string accountSid = Environment.GetEnvironmentVariable("TWILIO_ACCOUNT_SID"); string authToken = Environment.GetEnvironmentVariable("TWILIO_AUTH_TOKEN"); TwilioClient.Init(accountSid, authToken); var phoneNumber = await PhoneNumberResource.FetchAsync( pathPhoneNumber: "+447772000001", fields: "sim_swap"); Console.WriteLine(phoneNumber._SimSwap); } } ``` ```java // Install the Java helper library from twilio.com/docs/java/install import com.twilio.Twilio; import com.twilio.rest.lookups.v2.PhoneNumber; public class Example { // Find your Account SID and Auth Token at twilio.com/console // and set the environment variables. See http://twil.io/secure public static final String ACCOUNT_SID = System.getenv("TWILIO_ACCOUNT_SID"); public static final String AUTH_TOKEN = System.getenv("TWILIO_AUTH_TOKEN"); public static void main(String[] args) { Twilio.init(ACCOUNT_SID, AUTH_TOKEN); PhoneNumber phoneNumber = PhoneNumber.fetcher("+447772000001").setFields("sim_swap").fetch(); System.out.println(phoneNumber.getSimSwap()); } } ``` ```go // Download the helper library from https://www.twilio.com/docs/go/install package main import ( "fmt" "github.com/twilio/twilio-go" lookups "github.com/twilio/twilio-go/rest/lookups/v2" "os" ) func main() { // Find your Account SID and Auth Token at twilio.com/console // and set the environment variables. See http://twil.io/secure // Make sure TWILIO_ACCOUNT_SID and TWILIO_AUTH_TOKEN exists in your environment client := twilio.NewRestClient() params := &lookups.FetchPhoneNumberParams{} params.SetFields("sim_swap") resp, err := client.LookupsV2.FetchPhoneNumber("+447772000001", params) if err != nil { fmt.Println(err.Error()) os.Exit(1) } else { if resp.SimSwap != (lookups.SimSwapInfo{}) { fmt.Println(resp.SimSwap) } else { fmt.Println(resp.SimSwap) } } } ``` ```php lookups->v2 ->phoneNumbers("+447772000001") ->fetch(["fields" => "sim_swap"]); print $phone_number->simSwap; ``` ```ruby # Download the helper library from https://www.twilio.com/docs/ruby/install require 'twilio-ruby' # Find your Account SID and Auth Token at twilio.com/console # and set the environment variables. See http://twil.io/secure account_sid = ENV['TWILIO_ACCOUNT_SID'] auth_token = ENV['TWILIO_AUTH_TOKEN'] @client = Twilio::REST::Client.new(account_sid, auth_token) phone_number = @client .lookups .v2 .phone_numbers('+447772000001') .fetch(fields: 'sim_swap') puts phone_number.sim_swap ``` ```bash # Install the twilio-cli from https://twil.io/cli twilio api:lookups:v2:phone-numbers:fetch \ --phone-number +447772000001 \ --fields sim_swap ``` ```bash curl -X GET "https://lookups.twilio.com/v2/PhoneNumbers/%2B447772000001?Fields=sim_swap" \ -u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN ``` ```json { "calling_country_code": "44", "country_code": "GB", "phone_number": "+447772000001", "national_format": "07772 000001", "valid": true, "validation_errors": null, "caller_name": null, "sim_swap": { "last_sim_swap": { "last_sim_swap_date": "2020-04-27T10:18:50Z", "swapped_period": "PT48H", "swapped_in_period": true }, "carrier_name": "Vodafone UK", "mobile_country_code": "276", "mobile_network_code": "02", "error_code": null }, "call_forwarding": null, "line_status": null, "line_type_intelligence": null, "identity_match": null, "reassigned_number": null, "sms_pumping_risk": null, "phone_number_quality_score": null, "pre_fill": null, "url": "https://lookups.twilio.com/v2/PhoneNumbers/+447772000001" } ```