0x138

0x138 is a hexadecimal number that commonly appears as a short alphanumeric identifier in several digital contexts. In its raw form, "0x" denotes a hex literal, and the subsequent digits "138" represent the decimal value 312. The notation is widely used in programming languages such as C, C++, Java, and JavaScript to specify numeric constants in base 16.

Within the blockchain community, hex identifiers that consist of only a few characters occasionally serve as shorthand references to Ethereum addresses or smart contract bytecode sequences. While a full Ethereum address is 20 bytes (40 hexadecimal characters), developers sometimes use abbreviated hex strings like 0x138 to refer to contract deployment tags, internal operation codes, or to label transaction metadata in debugging logs. Because of the limited length, such shorthand identifiers are generally not valid addresses themselves but are employed as human‑readable labels for specific functions or data segments.

The notation also appears in other technical documents. For example, computer networking configurations sometimes display MAC address segments or memory allocation tags in hex, and 0x138 could denote a buffer offset or a configuration parameter value. In documentation and specification sheets, developers use similar formats to express constants in a concise way that is clear across multiple platforms.

Although the identifier 0x138 is not tied to a single widely known entity, its form is representative of the broader use of hexadecimal notation in software engineering, cryptography, and network protocols. Its concise representation makes it useful for quick reference and debugging across various programming and system administration contexts.