/**
 * A mutable IP allowlist/blocklist for IPv4 and IPv6 addresses, ranges, and subnets.
 *
 * IPv4-mapped IPv6 addresses such as `::ffff:192.0.2.1` are treated as
 * equivalent to plain IPv4 addresses such as `192.0.2.1`.
 */
export declare class IPRangeList {
    private intervals;
    /**
     * Returns a snapshot of the currently stored canonical merged ranges.
     */
    get ranges(): {
        start: string;
        end: string;
    }[];
    /**
     * Adds one IPv4 or IPv6 address and returns the same list.
     */
    addAddress(address: string): this;
    /**
     * Adds a CIDR subnet and returns the same list.
     *
     * Host bits are normalized to the subnet boundary.
     */
    addSubnet(subnet: string): this;
    /**
     * Adds the inclusive range between two addresses and returns the same list.
     */
    addRange(start: string, end: string): this;
    /**
     * Returns whether an address belongs to a stored range.
     *
     * Invalid candidates return false.
     */
    contains(address: string): boolean;
    /**
     * Alias for {@link contains}, matching Node.js `net.BlockList` terminology.
     */
    check(address: string): boolean;
    private addInterval;
}