IPv4
class IPv4 extends IP { }
constructor(octets: number[]);
octets: number[];
kind(): "ipv4";
range(): IPv4Range;
toIPv4MappedAddress(): IPv6;
static isIPv4(addr: string): boolean;
static isValid(addr: string): boolean;
static isValidCIDR(addr: string): boolean;
static isValidCIDRFourPartDecimal(addr: string): boolean;
static isValidFourPartDecimal(addr: string): boolean;