diff --git a/ArbAddressTable.sol b/ArbAddressTable.sol
index 3803ceb..b34a0b9 100644
--- a/ArbAddressTable.sol
+++ b/ArbAddressTable.sol
@@ -5,7 +5,7 @@
 pragma solidity >=0.4.21 <0.9.0;
 
 /**
- * @title Allows registering / retrieving addresses at uint indices, saving calldata.
+ * @title Deprecated - Allows registering / retrieving addresses at uint indices, saving calldata.
  * @notice Precompiled contract that exists in every Arbitrum chain at 0x0000000000000000000000000000000000000066.
  */
 interface ArbAddressTable {
diff --git a/ArbInfo.sol b/ArbInfo.sol
index 49e9572..316fd68 100644
--- a/ArbInfo.sol
+++ b/ArbInfo.sol
@@ -4,7 +4,8 @@
 
 pragma solidity >=0.4.21 <0.9.0;
 
-/// @title Lookup for basic info about accounts and contracts.
+/// @title Deprecated - Use standard EVM opcodes + ArbSys where chain-specific info is needed
+/// Lookup for basic info about accounts and contracts.
 /// @notice Precompiled contract that exists in every Arbitrum chain at 0x0000000000000000000000000000000000000065.
 interface ArbInfo {
     /// @notice Retrieves an account's balance