Many many years ago (late 90s) I used to use ".l" (dot ell), nominally meaning '...

DamonHD on Sept 16, 2023 | parent | context | favorite | on: The .alt Special-Use Top-Level Domain

Many many years ago (late 90s) I used to use ".l" (dot ell), nominally meaning 'local', for this purpose, on the assumption that a legit single letter TLD wasn't happening any time soon, and it was visually distinctive.