A table of the SS58 prefixes a person is likely to paste by mistake, from the SS58 registry, so a Polkadot or Kusama address pasted into the send form is refused as "a Polkadot address, not a Quantus address" rather than as a bare prefix number; a prefix nothing knows still says which prefix a Quantus address has. Profiles the wallet carries take precedence over the table, so a Quantus-family prefix names mainnet. Refs #37 Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014ftBXYuba8ARhQeF74oUgW