diff --git a/contracts/src/NameRegistry.sol b/contracts/src/NameRegistry.sol
index 5d0e948..bef006e 100644
--- a/contracts/src/NameRegistry.sol
+++ b/contracts/src/NameRegistry.sol
@@ -3,14 +3,22 @@
  * Interface for Name Registries.
  * Ricardo Guilherme Schmidt <3esmit@gmail.com>
  */
-pragma solidity ^0.4.11;
+pragma solidity ^0.4.9;
 
 contract NameRegistry {
     function getAddr(uint256 _id) public constant returns(address addr);
     function getAddr(string _name) public constant returns(address addr);
     function getName(address _addr) public constant returns(string name);
-
+    
     mapping (bytes32 => uint256) indexes; 
+
+    function getId(address _addr) public constant returns(uint256 id){
+        return indexes[sha3(_addr)];
+    } 
+
+    function getId(string _name) public constant returns(uint256 id) {
+        return indexes[sha3(_name)];
+    }
     
     function _updateIndex(bytes32 _old, bytes32 _new) internal {
         indexes[_new] = indexes[_old];