Overview

An address is a label or identifier that lets one find, reach, or communicate with a person, organization, place, or device. In everyday usage an address usually means a postal or e-mail address, but the word also refers to a formal speech or public address. As a verb, to address someone can mean to speak to them or to direct correspondence; as a noun it most often names the destination for mail or messages.

Common types and components

Addresses take different forms depending on context. Typical categories include:

  • Postal (street) addresses: house or building number, street name, locality, city, postal code and country.
  • Electronic addresses: e-mail addresses and messaging identifiers used to communicate digitally.
  • Network addresses: numeric or alphanumeric identifiers for devices on a network (for example, an IP address).
  • Web and resource addresses: URLs that point to web pages and online resources.

Formats, variations and etiquette

Formats vary by country and technology. Postal conventions dictate the order and abbreviations used on envelopes; many forms still ask for a person’s name, address and phone number. Electronic addresses follow specific syntax rules—an e-mail requires a local part, the “@” symbol and a domain, as in user@example—and must be entered correctly to ensure delivery. Proper addressing in formal letters also involves salutations and titles.

History and significance

Systems of addressing developed alongside urban growth, postal services and telecommunications. Standardized postal codes, international addressing rules and internet naming systems made routing and discovery more reliable. Addresses underpin logistics, emergency services, commerce, navigation and online identity.

Notable distinctions

It is useful to distinguish between a physical location (where something is) and a delivery address (where mail is sent). Some addresses are transient or virtual, such as temporary forwarding addresses or disposable e-mail aliases. Understanding the intended use—contact, delivery, legal identification or routing—helps determine which address form is appropriate.