dnstable implements an encoding format for passive DNS data. It consists of a C library, libdnstable, and several command line utilities for creating, querying, and merging dnstable data files. It stores key-value records in Sorted String Table (SSTable) files and provides high-level interfaces for querying or iterating over the stored records. dnstable encodes individual records using a format tailored for efficiently storing passive DNS data and can quickly perform both "forward" and "inverse" searches.
