

A crypto wallet address is the string of letters and numbers other people use to send you crypto, much like a bank account number, and it is safe to give out. You find yours behind the Receive button in a wallet app, or under Deposit on an exchange, after you choose a coin and a network. Keep the address and the network together, because a correct address used on the wrong network can still lose the money.
A blockchain is a public ledger, a shared record of who holds what. Your wallet address is the label on your line in that ledger. The coins never sit inside the app on your phone; the app holds the key that lets you move what is recorded against that line.
The address and the key come as a pair and do opposite jobs:
The address comes from the key through a one-way calculation, so nobody can work back from your address to your key. That is why one is public and the other stays with you. If you are not sure where those words went, start with how to find the seed phrase in your wallet.
The route is nearly the same in every app:
The same coin shows a different address in each app, because the two kinds of app work differently:
That difference also works in reverse. A withdrawal from an exchange usually comes from the exchange's own address, so if you need to pay someone back, ask for their address instead of using the sender address in your history.
If you have neither kind of app yet, you need one before any of these screens exist, so start with the best crypto wallet for your situation.

In the Coinbase app, the steps are:
On the Coinbase website, select the asset and then Receive crypto. Coinbase's separate self-custody app, known as Coinbase Wallet and for a while as the Base app, has its own addresses, so an address copied from one is not the address in the other.
MetaMask now gives each account several addresses, one per type of network, so the step that matters is picking the right one:
If someone sent you USDT to the right address and your balance shows nothing, the token may simply not be listed in the app yet, and here is how to add USDT to MetaMask.
The first characters and the length tell you the network. Here is one example for each, taken from that network's public documentation. They are for looking at only: never send anything to them, because the coins would go to a stranger or to nobody.
USDT has no address style of its own, which surprises people looking for a USDT example. It takes the format of whichever network carries it: USDT on TRON goes to an address starting with T, and USDT on Ethereum goes to one starting with 0x. So before anything else, you and the sender have to agree on a network, and the choice depends on which USDT network suits senders and which suits merchants.
A TON wallet address is 48 characters long and usually starts with UQ or EQ. The two prefixes are the same account written two ways. They differ in one flag that tells the sender's wallet whether a transfer may bounce back if the receiving side cannot take it:
Two more things trip people up on TON:
You give out the same address for USDT on TON as for Gram. Sending it has its own steps, and they are in what USDT on the TON network is and how to send it.
A correct address can still lose money if it travels without the two things that belong with it:
Your own wallet usually needs no memo, since the address is yours alone.
So when someone asks you to pay in USDT, get the full set from them in writing: the address, the network and the memo if there is one. With those three in hand, the rest is how to pay with USDT when you have never done it.
If a deposit has already gone out without its memo, do not send a second transfer to test things. Write to the exchange's support with the transaction ID, because the exchange may be able to credit it by hand.
A wallet address checker can mean three different checks, and each answers its own question:
None of these checks can tell you that the address belongs to the person you mean to pay. A stranger's valid address passes all three, so for a large payment, ask the recipient to confirm it through a second channel, such as a phone call.
Any checker that asks for your seed phrase is a theft attempt, because a real check needs only the address.
A blockchain transfer has no cancel button, so the time to catch a wrong address is before you confirm. Four habits lower the risk:
Yes. An address can only receive, so nobody can take your coins just by knowing it. Moving them takes your private key, your seed phrase or your own signature on a transaction.
Sharing does give away two things:
Theft comes through the key or a bad signature, after a fake site or message talks you into handing over one or the other. That is the risk worth guarding against, and it is explained in how a crypto wallet can get hacked.
If the visible balance bothers you, keep a separate wallet for the addresses you publish or give to strangers. The cost is one more wallet to look after, and a transfer between the two is visible too, so this hides your balance from a casual look and not from a determined one.
You can, and nothing breaks: an address keeps working however many times it is used. The costs show up elsewhere:
A single address works fine for one client you know. A shop with regular orders is better off with a fresh address for each order, so that every payment matches itself to its order, and that is part of how to accept crypto payments on a website.
Your wallet address is a public label you can hand out freely, and you find it on the Receive or Deposit screen after choosing a coin and a network. Send it with its network and any memo, paste it instead of typing it, and guard the seed phrase, because that is what actually controls the money.
You do not apply for one anywhere. Installing a self-custody wallet and saving its seed phrase creates your addresses for free, and an exchange makes one for you when you open its Deposit screen. We don't recommend address generators on websites, because whoever runs the page may keep a copy of the key, and the address is only as safe as that key.
On Ethereum-style networks, TRON and Solana, an address stays the same unless you create a new one yourself. Bitcoin wallets usually show a fresh address after each use, and the old ones stay yours and keep working. Exchanges can retire addresses: Binance replaces older deposit addresses in batches and emails the people affected, and later deposits to an expired address are not credited automatically. That is a good reason to copy your deposit address from the app each time instead of from an old note.
An address has no name on it, but its entire history is public and stays that way. The link to you appears where the address touches the real world, such as an exchange that holds your ID or a post where you published it. From there, analytics firms follow coins from address to address. Privacy coins such as Monero hide most of this trail by design, while on Bitcoin, Ethereum and the USDT networks it stays open, and businesses use it to give each wallet a crypto risk score.
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