diff --git a/common/hexutil/hexutil.go b/common/hexutil/hexutil.go
index 81e6804650..7b62045328 100644
--- a/common/hexutil/hexutil.go
+++ b/common/hexutil/hexutil.go
@@ -60,7 +60,7 @@ func Decode(input string) ([]byte, error) {
 	if len(input) == 0 {
 		return nil, ErrEmptyString
 	}
-	if !has0xPrefix(input) {
+	if !Has0xPrefix(input) {
 		return nil, ErrMissingPrefix
 	}
 	b, err := hex.DecodeString(input[2:])
@@ -185,7 +185,7 @@ func EncodeBig(bigint *big.Int) string {
 	}
 }
 
-func has0xPrefix(input string) bool {
+func Has0xPrefix(input string) bool {
 	return len(input) >= 2 && input[0] == '0' && (input[1] == 'x' || input[1] == 'X')
 }
 
@@ -193,7 +193,7 @@ func checkNumber(input string) (raw string, err error) {
 	if len(input) == 0 {
 		return "", ErrEmptyString
 	}
-	if !has0xPrefix(input) {
+	if !Has0xPrefix(input) {
 		return "", ErrMissingPrefix
 	}
 	input = input[2:]
diff --git a/common/hexutil/hexutil_test.go b/common/hexutil/hexutil_test.go
index f2b800d82c..24dce185e7 100644
--- a/common/hexutil/hexutil_test.go
+++ b/common/hexutil/hexutil_test.go
@@ -22,6 +22,11 @@ import (
 	"testing"
 )
 
+type hexValidityTest struct {
+	input string
+	want  bool
+}
+
 type marshalTest struct {
 	input interface{}
 	want  string
@@ -134,6 +139,12 @@ var (
 		{input: `0xbbb`, want: uint64(0xbbb)},
 		{input: `0xffffffffffffffff`, want: uint64(0xffffffffffffffff)},
 	}
+
+	hexStringValidityTest = []hexValidityTest{
+		{"0x", true},
+		{"asdcc", false},
+		{"0x00000102", true},
+	}
 )
 
 func TestEncode(t *testing.T) {
@@ -202,6 +213,15 @@ func TestDecodeUint64(t *testing.T) {
 	}
 }
 
+func TestHas0xPrefix(t *testing.T) {
+	for _, test := range hexStringValidityTest {
+		actual := Has0xPrefix(test.input)
+		if actual != test.want {
+			t.Errorf("input %s: value mismatch: got %t, want %t", test.input, actual, test.want)
+		}
+	}
+}
+
 func BenchmarkEncodeBig(b *testing.B) {
 	for _, bench := range encodeBigTests {
 		b.Run(bench.want, func(b *testing.B) {
diff --git a/rpc/types.go b/rpc/types.go
index f7e8e4b867..62384c8264 100644
--- a/rpc/types.go
+++ b/rpc/types.go
@@ -22,6 +22,7 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"strconv"
 	"strings"
 
 	"github.com/XinFinOrg/XDPoSChain/common"
@@ -99,10 +100,21 @@ func (bn *BlockNumber) UnmarshalJSON(data []byte) error {
 		return nil
 	}
 
-	blckNum, err := hexutil.DecodeUint64(input)
+	var blckNum uint64
+	var err error
+
+	//Check if input is valid hex string before converting.
+	if hexutil.Has0xPrefix(input) {
+		blckNum, err = hexutil.DecodeUint64(input)
+	} else {
+		//Else try converting input directly into uint64 value
+		blckNum, err = strconv.ParseUint(input, 10, 64)
+	}
+
 	if err != nil {
 		return err
 	}
+
 	if blckNum > math.MaxInt64 {
 		return errors.New("block number larger than int64")
 	}
diff --git a/rpc/types_test.go b/rpc/types_test.go
index e48db859d4..5ace764f22 100644
--- a/rpc/types_test.go
+++ b/rpc/types_test.go
@@ -42,7 +42,7 @@ func TestBlockNumberJSONUnmarshal(t *testing.T) {
 		6:  {`"0x12"`, false, BlockNumber(18)},
 		7:  {`"0x7fffffffffffffff"`, false, BlockNumber(math.MaxInt64)},
 		8:  {`"0x8000000000000000"`, true, BlockNumber(0)},
-		9:  {"0", true, BlockNumber(0)},
+		9:  {"0", false, BlockNumber(0)},
 		10: {`"ff"`, true, BlockNumber(0)},
 		11: {`"pending"`, false, PendingBlockNumber},
 		12: {`"latest"`, false, LatestBlockNumber},
@@ -52,6 +52,11 @@ func TestBlockNumberJSONUnmarshal(t *testing.T) {
 		16: {`someString`, true, BlockNumber(0)},
 		17: {`""`, true, BlockNumber(0)},
 		18: {``, true, BlockNumber(0)},
+		19: {`88439993`, false, BlockNumber(88439993)},
+		20: {`-1`, true, BlockNumber(0)},
+		21: {`9223372036854775807`, false, BlockNumber(9223372036854775807)},
+		22: {`-9223372036854775808`, true, BlockNumber(0)},
+		23: {`18446744073709551615`, true, BlockNumber(0)},
 	}
 
 	for i, test := range tests {