import { Ipv4Address } from './ipv4-address';
/**
 * Predicate function that will return true if the given
 * address is in the private RFC 1918 ipv4 address space.
 *
 * See more {@link https://datatracker.ietf.org/doc/html/rfc1918}
 */
export declare function isPrivateRFC1918(address: Ipv4Address): boolean;