10digit

10digit is a term used to describe a numeric string consisting of ten decimal digits. It is not a single standardized identifier, but a generic descriptor applied across multiple domains to indicate a fixed-length numeric key or code.

In telecommunications, a ten-digit sequence is familiar as the plain-number portion of a North American Numbering Plan telephone number, which typically comprises a three-digit area code followed by a seven-digit local number. In information management, 10-digit identifiers are used for inventory items, customer IDs, transaction codes, and other internal keys because the fixed length simplifies storage, indexing, and data validation. Some platforms assign 10-digit user IDs, order numbers, or reference codes for consistency and readability. In some contexts, 10-digit codes may be augmented with separators (such as hyphens), but the underlying value remains ten digits.

Validation and formatting rules vary by system. Many 10-digit identifiers allow leading zeros and depend on a check digit to detect errors, though not all implementations use a check digit. When a check digit is present, common schemes include modulo-10 algorithms such as the Luhn algorithm, or domain-specific checks tailored to a particular application.

Examples of 10digit usage include a NANP-style phone number like 4155550123, internal order codes such as 1023456789, or asset tags in corporate databases. The concept is widely used wherever a compact, fixed-length numeric key is advantageous for processing and interoperability.