diff --git a/common/ipprefix.h b/common/ipprefix.h
index f1c4d27fe..0b1815799 100644
--- a/common/ipprefix.h
+++ b/common/ipprefix.h
@@ -3,6 +3,7 @@
 
 #include <assert.h>
 #include <stdexcept>
+#include <arpa/inet.h>
 #include "ipaddress.h"
 
 namespace swss {
@@ -65,7 +66,7 @@ class IpPrefix
             {
                 ip_addr_t ipa;
                 ipa.family = AF_INET6;
-                
+
                 assert(m_mask >= 0 && m_mask <= 128);
                 int mid = m_mask >> 3;
                 int bits = m_mask & 0x7;
@@ -133,6 +134,49 @@ class IpPrefix
         }
     }
 
+    inline IpPrefix getSubnet() const
+    {
+        switch (m_ip.getIp().family)
+        {
+            case AF_INET:
+            {
+                uint32_t ipaddr = m_ip.getV4Addr();
+                uint32_t mask = getMask().getV4Addr();
+
+                ipaddr &= mask;
+                return IpPrefix(ipaddr, m_mask);
+            }
+
+            case AF_INET6:
+            {
+                const uint8_t *ipaddr = m_ip.getV6Addr();
+                uint8_t subnet[INET6_ADDRSTRLEN] = {0};
+                memcpy(subnet, ipaddr, 16);
+
+                IpAddress ip6mask = getMask();
+                const uint8_t *mask = ip6mask.getV6Addr();
+
+                for (int i = 0; i < 16; ++i)
+                {
+                    subnet[i] &= mask[i];
+                }
+
+                char buf[INET6_ADDRSTRLEN];
+                std::string ipStr(inet_ntop(AF_INET6,
+                                            &subnet,
+                                            buf,
+                                            INET6_ADDRSTRLEN));
+
+                return IpPrefix(ipStr + "/" + std::to_string(m_mask));
+            }
+
+            default:
+            {
+                throw std::logic_error("Invalid family");
+            }
+        }
+    }
+
     inline bool operator<(const IpPrefix &o) const
     {
         if (m_mask != o.m_mask)
diff --git a/tests/ipprefix_ut.cpp b/tests/ipprefix_ut.cpp
index 623693955..26d60fbce 100644
--- a/tests/ipprefix_ut.cpp
+++ b/tests/ipprefix_ut.cpp
@@ -115,3 +115,32 @@ TEST(IpPrefix, subnet)
     EXPECT_FALSE(prefix1.isAddressInSubnet(ip3));
     EXPECT_FALSE(prefix2.isAddressInSubnet(ip3));
 }
+
+TEST(IpPrefix, getSubnet)
+{
+    // IPv4 prefixes
+    IpPrefix prefix1("1.1.1.0/0");
+    IpPrefix prefix2("1.1.1.191/24");
+    IpPrefix prefix3("1.1.1.191/26");
+    IpPrefix prefix4("1.1.191.1/20");
+    IpPrefix prefix5("2.2.2.2/32");
+
+    // IPv6 prefixes
+    IpPrefix prefix6("::/0");
+    IpPrefix prefix7("2001:4898:f0:f153:357c:77b2:49c9:627c/64");
+    IpPrefix prefix8("2001:4898:f0:f153:357c:77b2:49c9:627c/63");
+    IpPrefix prefix9("2001:4898:f0:f153:357c:77b2:49c9:627c/45");
+    IpPrefix prefix10("2001:4898:f0:f153:357c:77b2:49c9:627c/128");
+
+    EXPECT_EQ("0.0.0.0/0", prefix1.getSubnet().to_string());
+    EXPECT_EQ("1.1.1.0/24", prefix2.getSubnet().to_string());
+    EXPECT_EQ("1.1.1.128/26", prefix3.getSubnet().to_string());
+    EXPECT_EQ("1.1.176.0/20", prefix4.getSubnet().to_string());
+    EXPECT_EQ("2.2.2.2/32", prefix5.getSubnet().to_string());
+
+    EXPECT_EQ("::/0", prefix6.getSubnet().to_string());
+    EXPECT_EQ("2001:4898:f0:f153::/64", prefix7.getSubnet().to_string());
+    EXPECT_EQ("2001:4898:f0:f152::/63", prefix8.getSubnet().to_string());
+    EXPECT_EQ("2001:4898:f0::/45", prefix9.getSubnet().to_string());
+    EXPECT_EQ("2001:4898:f0:f153:357c:77b2:49c9:627c/128", prefix10.getSubnet().to_string());
+}