30001200

30001200 is a numerical identifier that appears in various contexts, most notably as a part of the **International Standard Book Number (ISBN)** system. ISBNs are unique numeric commercial book identifiers assigned to books and book-like publications to facilitate organization, cataloging, and sales tracking in the publishing industry.

The specific code 30001200 is not a standalone ISBN but rather a prefix or segment used within the ISBN-13 format, which replaced the older ISBN-10 system. ISBN-13 consists of 13 digits, where the first three digits (the **Group Identifier**) indicate the country or language region where the publisher is based. For example, 978 or 979 are common prefixes for English-language books, while 30001200 is associated with publishers in **Germany** or other German-speaking regions, as part of the **Deutsche Nationalbibliothek’s (German National Library) allocation**.

In addition to publishing, the number may appear in other standardized numbering systems, such as **product codes** or **inventory identifiers**, though its direct relevance is primarily tied to ISBNs. The exact meaning depends on the context in which it is used, and without additional information, its precise application cannot be determined beyond its role in bibliographic identification.

For accurate verification, databases like the **International ISBN Agency** or national bibliographic agencies should be consulted. The structure of ISBNs ensures that each book retains a globally unique identifier, aiding in distribution and library cataloging.