8021 Attribution Checker

Verify if a Base transaction is 8021 attributed

Encode / Decode Attribution

Create or decode ERC-8021 attribution suffixes for your transactions.

  1. On BaseScan, open the transaction
  2. Click More Details
  3. Copy the hex code from Input Data

Enter the hex suffix (with or without 0x prefix)

What is 8021 Attribution?

A transaction is considered "8021 attributed" when the last 16 bytes (32 hex characters) of its input data match the pattern 8021 repeated 8 times.

80218021802180218021802180218021

This checker validates Base blockchain transactions against this pattern. Learn more about ERC-8021