diff --git a/net/cidr/range.go b/net/cidr/range.go
index e5c9abd..1d76987 100644
--- a/net/cidr/range.go
+++ b/net/cidr/range.go
@@ -31,7 +31,9 @@ type CIDRRanger interface {
 	Contains(ip net.IP) bool
 	First() net.IP
 	Last() net.IP
-	Range() []net.IP
+	Range(exclude []net.IP) []net.IP
 	Broadcast() net.IP
 	Network() net.IP
+	Next(ip net.IP) net.IP
+	Previous(ip net.IP) net.IP
 }
diff --git a/net/cidr/range_v4.go b/net/cidr/range_v4.go
index ae814fc..27fe60d 100644
--- a/net/cidr/range_v4.go
+++ b/net/cidr/range_v4.go
@@ -24,7 +24,7 @@ func (cr *cidrRangeIPv4) Last() net.IP {
 	return cr.Previous(bIP)
 }
 
-func (cr *cidrRangeIPv4) Range() []net.IP {
+func (cr *cidrRangeIPv4) Range(exclude []net.IP) []net.IP {
 	fIP := cr.First()
 	if nil == fIP {
 		return nil
@@ -35,8 +35,21 @@ func (cr *cidrRangeIPv4) Range() []net.IP {
 	}
 	fNum := converter.IPv4ToInt(fIP.To4())
 	lNum := converter.IPv4ToInt(lIP.To4())
+
+	exs := make([]int32, 0)
+	if nil != exclude {
+		for _, ex := range exclude {
+			exs = append(exs, converter.IPv4ToInt(ex.To4()))
+		}
+	}
+
 	r := make([]net.IP, 0)
 	for i := fNum; i <= lNum; i++ {
+		for _, exN := range exs {
+			if exN == i {
+				continue
+			}
+		}
 		r = append(r, converter.IntToIPv4(i))
 	}
 	return r
diff --git a/net/cidr/range_v6.go b/net/cidr/range_v6.go
index 4ec8804..fe5ecfa 100644
--- a/net/cidr/range_v6.go
+++ b/net/cidr/range_v6.go
@@ -11,29 +11,29 @@ func (cr *cidrRangeIPv6) Contains(ip net.IP) bool {
 }
 
 func (cr *cidrRangeIPv6) First() net.IP {
-
+	return nil
 }
 
 func (cr *cidrRangeIPv6) Last() net.IP {
-
+	return nil
 }
 
-func (cr *cidrRangeIPv6) Range() []net.IP {
-
+func (cr *cidrRangeIPv6) Range(exclude []net.IP) []net.IP {
+	return nil
 }
 
 func (cr *cidrRangeIPv6) Broadcast() net.IP {
-
+	return nil
 }
 
 func (cr *cidrRangeIPv6) Network() net.IP {
-
+	return nil
 }
 
-func (cr *cidrRangeIPv6) Next(ip net.IP) {
-
+func (cr *cidrRangeIPv6) Next(ip net.IP) net.IP {
+	return nil
 }
 
-func (cr *cidrRangeIPv6) Previous(ip net.IP) {
-
+func (cr *cidrRangeIPv6) Previous(ip net.IP) net.IP {
+	return nil
 }