# 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 don't 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" } ```