One United States number (+1), used once, to receive a WhatsApp verification SMS. This page shows what a supplier lists for this exact pair and how the order runs.
A listing is what a supplier reports, not a number set aside for you. Listed prices and availability are cached supplier estimates. A number is assigned only when the order is placed, and allocation can fail.
A United States number is the +1 country code followed by ten digits. On the WhatsApp registration screen, select United States as the country and type the ten digits; WhatsApp fills in +1. Canada and several Caribbean countries share +1, so check that United States is the country selected before you continue.
A number ordered here receives text messages only. When WhatsApp asks how to deliver the code, pick the SMS option, then read the code from the order in your dashboard.
A supplier listing for WhatsApp in the United States means a supplier reports numbers for that route. It does not mean WhatsApp will accept the number you are assigned or send it a code. If no SMS reaches the order before it expires, the charge is credited back to your account balance.
This is a one-time number. Once the order closes, later messages to it do not reach you, including a new code if WhatsApp asks you to verify the same number again. WhatsApp has its own two-step verification PIN and account email settings inside the app; set them there if you plan to keep the account.
A listing does not reserve a number. The price you pay is the one the dashboard shows when you confirm.
You can cancel an open order once 2 minutes have passed and no code has arrived, and the charge is credited back to your account balance. Asking for another SMS and finishing an order early are not available.