If you choose a specific phone prefix and no numbers are available to purchase, it’s an area code shortage that you experience.
This happens when our service provider has a shortage of numbers with that area code. Usually, it may take 1-2 days for the phone numbers to be available again but sometimes it could take a little longer around 3-5 days.
We recommend trying with a different local area code for that market you can use as a replacement. In case you want to use the same area code, try again in the next couple of days.