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NUMBERS-TEF file extension

The table below provides useful information about the .numbers-tef file extension. It answers questions such as:

  • What is the .numbers-tef file?
  • What program do I need to open a .numbers-tef file?
  • How can the .numbers-tef file be opened, edited or printed?
  • How can I convert .numbers-tef files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Apple Numbers iCloud Spreadsheet

NUMBERS-TEF file is an Apple Numbers iCloud Spreadsheet. Numbers is a spreadsheet application developed by Apple Inc. as part of the iWork productivity suite alongside Keynote and Pages.
NUMBERS-TEF format description not yet available
Category: Document files
Application: Apple Numbers
Mime-type: application/octet-stream
Magic number: 0x50, 0x4b, 0x03, 0x04
Magic string: PK
Sample: -
NUMBERS-TEF aliases:
NUMBERS-TEF related links:
NUMBERS-TEF related extensions:
Microsoft Works Spreadsheet

Quattro Pro Spreadsheet

Microsoft Excel Worksheet

Lotus 123 Spreadsheet

OpenDocument Spreadsheet

Microsoft Excel 2007 Document

Microsoft Works Spreadsheet

Lotus 1-2-3 V2 Spreadsheet

Quattro Pro Compressed Spreadsheet

GenStat Spreadsheet

Other types of files may also use the .numbers-tef file extension.

🔴 Can't open a .numbers-tef file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .numbers-tef file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .numbers-tef file extension, write to us!

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