Postcodes
Postcode vs Address vs Coordinates
A postcode names an area, an address names a place in human terms, and coordinates name a point on Earth. Compare how each one works.
Updated 14 October 2026 · 3 min read
These three ways of describing a place answer different questions. A postcode says which delivery area, an address says which building in human terms, and coordinates say which point on the Earth.
Postcode: an area
A postcode is a short code from the postal operator that groups addresses into delivery zones. It is great for sorting, pricing and rough location, but it covers many properties. See postcode structure explained.
Address: a place in words
An address combines a name or number, street, locality, city and usually a postcode. It is designed for people and mail carriers. It is flexible, but not always consistent: spellings vary, and in some countries streets are not named or numbered, so the address relies on landmarks.
Coordinates: a point
Coordinates, usually latitude and longitude, identify a point mathematically. They are unambiguous and work everywhere, but they are not convenient for people to say or write, and they say nothing about which door or entrance is meant.
Side by side
- Precision: postcode is coarse, address is moderate, coordinates are exact.
- Human friendliness: address is best, postcode is good, coordinates are poor.
- Works without map data: postcode and address do, coordinates need a map or GPS.
- Needed for mail: postcode and address, usually not coordinates.
Why combine them
Each fills the gap of the others. The address and postcode serve the mail system, and coordinates serve navigation. A short code that represents coordinates in a convenient form can bridge the two. UPCS does exactly that: it maps a chosen point to a short code for a 3 m by 3 m cell, which can be shared with the address. It is not an official postcode.
Where to go next
If you are curious how a postcode relates to coordinates, read can a postcode be converted to coordinates. For the weaknesses of area codes, see why postcodes cannot pinpoint exact locations.
Key takeaway
A useful rule of thumb is to ask what you need to do with the location. To send mail, you need an address and postcode. To drive to a gate, you need a precise point. To estimate shipping or risk, an area is usually enough. Picking the right form for the task avoids both over-collecting data and under-delivering.
Frequently asked questions
Is a postcode the same as coordinates?
No. A postcode identifies a delivery area. Coordinates are latitude and longitude values that identify a point on the Earth.
Which is best for finding a place?
Coordinates are the most precise, but addresses are easier for people. Using an address with a postcode, and optionally coordinates, works well.