diff --git a/ip_range/ip_range.go b/ip_range/ip_range.go
index 21e6a60..51018b4 100644
--- a/ip_range/ip_range.go
+++ b/ip_range/ip_range.go
@@ -2,10 +2,8 @@ package iprange
 
 import (
 	"fmt"
-	"net"
+	"net/netip"
 	"strings"
-
-	"github.com/charlienet/go-mixed/bytesconv"
 )
 
 type IpRange struct {
@@ -13,40 +11,32 @@ type IpRange struct {
 }
 
 type ipSegment interface {
-	Contains(net.IP) bool
+	Contains(netip.Addr) bool
 }
 
 type singleIp struct {
-	ip net.IP
+	ip netip.Addr
 }
 
-func (i *singleIp) Contains(ip net.IP) bool {
-	return i.ip.Equal(ip)
+func (i *singleIp) Contains(ip netip.Addr) bool {
+	return i.ip.Compare(ip) == 0
 }
 
-type cidrSegments struct {
-	cidr *net.IPNet
+type prefixSegments struct {
+	prefix netip.Prefix
 }
 
-func (i *cidrSegments) Contains(ip net.IP) bool {
-	return i.cidr.Contains(ip)
+func (i *prefixSegments) Contains(ip netip.Addr) bool {
+	return i.prefix.Contains(ip)
 }
 
 type rangeSegment struct {
-	start rangeIP
-	end   rangeIP
+	start netip.Addr
+	end   netip.Addr
 }
 
-type rangeIP struct {
-	Hight uint64
-	Lower uint64
-}
-
-func (r *rangeSegment) Contains(ip net.IP) bool {
-	ih, _ := bytesconv.BigEndian.BytesToUInt64(ip[:8])
-	i, _ := bytesconv.BigEndian.BytesToUInt64(ip[8:])
-
-	return ih >= r.start.Hight && ih <= r.end.Hight && i >= r.start.Lower && i <= r.end.Lower
+func (r *rangeSegment) Contains(ip netip.Addr) bool {
+	return ip.Compare(r.start) >= 0 && ip.Compare(r.end) <= 0
 }
 
 // IP范围判断，支持以下规则:
@@ -55,6 +45,7 @@ func (r *rangeSegment) Contains(ip net.IP) bool {
 // 掩码模式，如 192.168.2.0/24
 func NewRange(ip ...string) (*IpRange, error) {
 	seg := make([]ipSegment, 0, len(ip))
+
 	for _, i := range ip {
 		if s, err := createSegment(i); err != nil {
 			return nil, err
@@ -67,13 +58,13 @@ func NewRange(ip ...string) (*IpRange, error) {
 }
 
 func (r *IpRange) Contains(ip string) bool {
-	nip := net.ParseIP(ip)
-	if nip == nil {
+	addr, err := netip.ParseAddr(ip)
+	if err != nil {
 		return false
 	}
 
 	for _, v := range r.segments {
-		if v.Contains(nip) {
+		if v.Contains(addr) {
 			return true
 		}
 	}
@@ -89,34 +80,30 @@ func createSegment(ip string) (ipSegment, error) {
 			return nil, fmt.Errorf("IP范围定义错误:%s", ip)
 		}
 
-		start := net.ParseIP(ips[0])
-		end := net.ParseIP(ips[1])
-		if start == nil {
-			return nil, fmt.Errorf("IP范围起始地址格式错误:%s", ips[0])
+		start, err := netip.ParseAddr(ips[0])
+		if err != nil {
+			return nil, err
 		}
 
-		if end == nil {
-			return nil, fmt.Errorf("IP范围结束地址格式错误:%s", ips[0])
+		end, err := netip.ParseAddr(ips[1])
+		if err != nil {
+			return nil, err
 		}
 
-		sh, _ := bytesconv.BigEndian.BytesToUInt64(start[:8])
-		s, _ := bytesconv.BigEndian.BytesToUInt64(start[8:])
-		eh, _ := bytesconv.BigEndian.BytesToUInt64(end[:8])
-		e, _ := bytesconv.BigEndian.BytesToUInt64(end[8:])
-
-		return &rangeSegment{start: rangeIP{
-			Hight: sh, Lower: s},
-			end: rangeIP{Hight: eh, Lower: e}}, nil
+		return &rangeSegment{
+			start: start,
+			end:   end,
+		}, nil
 
 	case strings.Contains(ip, "/"):
-		if _, cidr, err := net.ParseCIDR(ip); err != nil {
+		if prefix, err := netip.ParsePrefix(ip); err != nil {
 			return nil, err
 		} else {
-			return &cidrSegments{cidr: cidr}, nil
+			return &prefixSegments{prefix: prefix}, nil
 		}
 	default:
-		i := net.ParseIP(ip)
-		if i == nil {
+		i, err := netip.ParseAddr(ip)
+		if err != nil {
 			return nil, fmt.Errorf("格式错误, 不是有效的IP地址:%s", ip)
 		}
 
diff --git a/ip_range/ip_range_test.go b/ip_range/ip_range_test.go
index 34bc535..e4e325c 100644
--- a/ip_range/ip_range_test.go
+++ b/ip_range/ip_range_test.go
@@ -1,6 +1,7 @@
 package iprange
 
 import (
+	"net/netip"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -29,7 +30,7 @@ func TestSingleIp(t *testing.T) {
 	assert.False(t, r.Contains("192.168.0.123"))
 }
 
-func TestCIDR(t *testing.T) {
+func TestPrefix(t *testing.T) {
 	r, err := NewRange("192.168.2.0/24")
 	if err != nil {
 		t.Fatal(err)
@@ -40,6 +41,18 @@ func TestCIDR(t *testing.T) {
 	assert.False(t, r.Contains("192.168.3.162"))
 }
 
+func TestPrefix2(t *testing.T) {
+	r, err := NewRange("192.168.15.0/21")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	assert.True(t, r.Contains("192.168.8.10"))
+	assert.True(t, r.Contains("192.168.14.162"))
+	assert.False(t, r.Contains("192.168.3.162"))
+	assert.False(t, r.Contains("192.168.2.162"))
+}
+
 func TestRange(t *testing.T) {
 	r, err := NewRange("192.168.2.20-192.168.2.30")
 	if err != nil {
@@ -52,5 +65,29 @@ func TestRange(t *testing.T) {
 
 	assert.False(t, r.Contains("192.168.2.10"))
 	assert.False(t, r.Contains("192.168.2.31"))
-
+}
+
+func TestLocalhost(t *testing.T) {
+	r, err := NewRange("::1")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	assert.True(t, r.Contains("::1"))
+}
+
+func TestNetIP(t *testing.T) {
+	addr, err := netip.ParseAddr("192.168.2.10")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	t.Log(netip.MustParseAddr("192.168.2.4").Compare(addr))
+	t.Log(netip.MustParseAddr("192.168.2.10").Compare(addr))
+	t.Log(netip.MustParseAddr("192.168.2.11").Compare(addr))
+
+	prefix := netip.MustParsePrefix("192.168.2.0/24")
+
+	t.Log(prefix.Contains(netip.MustParseAddr("192.168.2.53")))
+	t.Log(prefix.Contains(netip.MustParseAddr("192.168.3.53")))
 }