"Número Interior" in Mexican Addresses: What It Means & How to Use It

When filling out a Mexican address form, you’ll see two number fields: Número Exterior (Exterior Number) and Número Interior (Interior Number).

Simple Translation

Número Interior = Interior Number = Unit / Apartment / Suite / Office Number.

How It Works

• Número Exterior: The building’s number on the street (e.g., 123).
• Número Interior: The specific unit inside that building (e.g., Apt 4B, Depto 101, Local 5, Oficina 204).

Examples

Key Points

• If it’s a standalone house with no subunits, leave Interior blank or write "S/N" (sin número).
• Common abbreviations: Int., Depto. (departamento), Apt., Local (commercial), Of. (oficina).
• Essential for mail, packages, Uber, DiDi, government forms (SAT, INE), and emergency services.

Think of it exactly like "Apt #" or "Unit #" in a U.S./Canadian address—just the Mexican standard term.