The MMDB file format is a binary format designed to store IP address ranges in a way that facilitates extremely fast IP address metadata lookups. When an IP database is stored in MMDB file format, you can efficiently retrieve IP address information from it.
You need to use special libraries or modules to work with this binary data format. As the file is in binary format and not plaintext, you cannot search for IP addresses and find the associated metadata. Please refer to the documentation of these libraries for instructions.
Please note that the MMDB reader libraries are not the same as the MaxMind client libraries. The MMDB reader libraries are designed solely for working with MMDB databases of any IP data provider.