In most cases, you would need an internet connection to use a crypto wallet address. Crypto wallets are digital applications or platforms that require an internet connection to communicate with the blockchain network. This is necessary for sending and receiving transactions, checking your balance, and performing other wallet functions. However, there are also offline wallets available, known as hardware wallets, that allow you to securely store your crypto wallet address offline and only connect to the internet when necessary, adding an extra layer of security.