Are Ethereum Addresses Case Sensitive? The True Answer

If you are new to cryptocurrency overall, or just Ethereum, you may find that you have many questions. One of the prime elements of Ethereum is buying and selling cryptocurrency using an address system to deliver funds.

Ethereum addresses are not case-sensitive. There is no differential between capital letters or lower case letters for the Ethereum addresses, so there is no need to use both capital and lowercase letters in the address.

Since Ethereum addresses are not case sensitive, you need not worry about using capital and lowercase letters. However, there is much more to learn about buying, selling, and owning Ethereum. 

What Is an Ethereum Address?

The Ethereum address is the public address that is needed to send ETH from one party to another. Because it is a public address, there is no need to protect and safeguard your Ethereum address. 

The Ethereum address also serves as an identifier on the decentralized blockchain platform. An Ethereum address is a key function of the Ethereum platform. Without it, users would not be able to buy and sell ETH. 

Externally Owned Addresses

Ethereum actually uses two addresses, externally owned addresses (EOA) and contract addresses. An externally owned address is connected to an account that holds your funds using public and private keys. 

EOAs have no costs and the owner can initiate transactions. Additionally, users can transfer funds between externally owned addresses and contract addresses. There are no restrictions for the accounts associated with EOA. 

Contract Addresses

A contract address, as the name implies, is created when a contract is generated from the Ethereum blockchain. When written in code, users can execute agreements on their own contracts between themselves and other users. The code created controls the Ethereum address. 

Contracts are not free. There is a cost associated with generating agreements. Further, there are restrictions with these addresses. Transactions are only reactionary and new transactions are not allowed. 

What these two types of Ethereum addresses share is the format. They both utilize a hexadecimal character system. These addresses are 42 characters long. They both also begin with the same character pair: 0x. 

Ethereum Address Visibility

Ethereum addresses and the balance of each address are visible on the blockchain. The owner of the Ethereum address, on the other hand, is not visible on the blockchain. While the Ethereum owner has a publicly visible address, the private key protects the assets. 

Each Ethereum account is provided with an Ethereum private key. The private key is 32 bytes of data, selected randomly. The key essentially controls the assets within the Ethereum account. Whoever has access to the private key would, in turn, have access to all the funds within the Ethereum account. 

Ethereum Transaction Signatures

Each Ethereum transaction requires a cryptographic signature. The signature, in part, contains the users’ Ethereum private key. The Ethereum private key functions as the signature to complete transactions. 

Your signature is used when transactions are initiated in any of the following places:

  • Within the Ethereum platform
  • Inside one of the Ethereum dApps
  • Via an Ethereum supported wallet

What Is ETH?

ETH, short for Ether, is a type of cryptocurrency token. However, ETH is a cryptocurrency specific to the Ethereum network. In other words, Ethereum is the network, while ETH is the actual cryptocurrency that is bought, sold, and otherwise traded. 

Ethereum is the second most popular cryptocurrency, and comes behind BTC or bitcoin. You can only purchase ETH on a cryptocurrency exchange such as Binance or Coinbase. It has been sold since 2014. 

How Ethereum Works

Ethereum’s prime contender, Bitcoin, uses miners to process transactions. The miners collect a fee for facilitating and completing transactions. Ethereum works quite the same.

Instead of miners, however, Ethereum uses node operators. The operators process the requested transactions, but they charge a fee for facilitating the exchanges. The Ethereum fees are referred to as gas fees. 

Purchasing ETH

You can purchase ETH in one of two ways. You can buy ETH either through a centralized exchange or a decentralized exchange (DEX). In addition, the type of transactions you conduct determines the kind of exchange you use. 

Centralized exchanges keep custody over your purchased ETH until you send the coins to your wallet. However, with DEX, you can trade while retaining complete control over your funds.

Centralized Exchanges

A centralized exchange allows users to purchase cryptocurrencies. The centralized exchange serves as a bank, holding ETH until it is sold. When ETH is purchased, the centralized exchange sends the money to the user’s wallet.

Decentralized Exchanges

ETH can be moved freely with decentralized exchanges or DEX. When a DEX is utilized, users can trade funds that were purchased from a centralized exchange. One of the benefits is that a DEX allows users to engage in peer-to-peer transactions.

Wallets for Ethereum

To own ETH, you will need a wallet to store it. Your wallet will store your ETH, record your transactions and track your balance. Your wallet is also used to send and receive funds from other users.  

Fortunately, there are several wallet options to choose from: software, hardware, and paper. Whichever you choose, it is important to keep your wallet safe, protecting it from other users who may take control of your cryptocurrency funds. 

Adding Addresses to Wallets

As already noted, you can have as many addresses for sending and receiving Ether as you wish. Adding addresses to wallets helps add an extra layer of security. Users can select the addresses that they want to interact with. If anyone attempts to send funds to an enlisted address, the transaction gets denied.

Ethereum DApps (Decentralized Applications)

Ethereum continues to strive and push the boundaries of Ethereum financial products. Developing DApps has allowed Ethereum to do so, giving users the ability to create their own products. 

DApps are, in fact, digital applications. These applications need blockchain or peer-to-peer networks to run. While DApps are usually built on the Ethereum platform, they are not under the control of Ethereum or any other individual authority. 

Ethereum acknowledges that some of its DApps are still in the very early stages and even experimental. However, other DApps have gained popularity and, along with that, success. The DApps that are doing well are in the finance, arts and collectibles, gaming, and technology categories.

Some of the most popular DApps are:

  • Dark Forest
  • Foundation
  • Uniswap
  • PoolTogether

Because DApps are still in their infancy, only dating back to 2017, they are susceptible to technical issues and hiccups. Again, the interface is not always user-friendly and developers may find altering code modifications a challenge. However, the creation of DApps has helped catapult Ethereum prices. 

Due to the structure of the Ethereum network, DApps remain on the platform, even if they are not well-used. In other words, DApps cannot be removed from the platform. 

Ethereum Upgrades

Ethereum has continued to grow, partly due to DApps. To support the growth, upgrades have been necessary since Ethereum’s inception. Unfortunately, upgrades can cause issues within the Ethereum network.

Ethereum handles upgrades in one of two ways: soft forks or hard forks. 

Soft forks are changes that are typically minor. These upgrades are usually backward compatible and have little interruption that requires node operator involvement.

Hard forks, on the other hand, are generally noteworthy and more complicated. Many times, these upgrades are not backward compatible. As a result, node operators will need to utilize the latest version of the blockchain to keep the blockchain operational. 


Rest assured, a capital letter in place of a lowercase letter is an irrelevant issue in an Ethereum address. Ethereum addresses are not case-sensitive. However, there is much more that impacts an Ethereum contract beyond the Ethereum address. 


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