L1251.zip May 2026

Direct Filing Addresses for Form N-400, Application for Naturalization

"L-1251" is a specific postal locator for USAA's European operations.

: USAA S.A., 1, avenue du Bois, L-1251 Luxembourg.

The string "1251" appears as part of a 9-digit ZIP code (85036-1251) for the USCIS Phoenix Lockbox . : P.O. Box 21251, Phoenix, AZ 85036-1251.

: Used for filing Form N-400 (Application for Naturalization) for residents of states like Arkansas, Louisiana, Oklahoma, and Texas. 3. Geographic & Utility Data

: This address is used for policy services and international insurance support for USAA members stationed or living in Europe. 2. USCIS Lockbox Reference