Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .oab

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

Below, you can find answers to the following questions:

  • What is the .oab file?
  • Which program can create the .oab file?
  • Where can you find a description of the .oab format?
  • What can convert .oab files to a different format?
  • Which MIME-type is associated with the .oab extension?
Microsoft Outlook Offline Address Book .oab file icon

Microsoft Outlook Offline Address Book

The OAB file is a Microsoft Outlook Offline Address Book. An offline address book (OAB) is a copy of a collection of address lists that has been downloaded so that a Microsoft Outlook user can access the information it contains while disconnected from the Exchange server.
Category: Data files
Application: Microsoft Outlook
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Microsoft Outlook Navigation Bar
Microsoft Outlook Template
Microsoft Outlook Profile
Microsoft Outlook Personal Folder File
Microsoft Outlook Form Storage
Microsoft Outlook Rules Wizard Data
Microsoft Outlook Offline Folder File
Microsoft Outlook Personal Address Book
Microsoft Outlook 2000 Auto Complete Nick List

Other types of files may also use the .oab file extension. If you have helpful information about .oab extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Android ADB Backup Archive
DVD Audio Object
Source Insight Auxiliary Symbol Index
Kmail Addressbook Data
Steinberg WaveLab CD/DVD Label Set
OpenAccess Database
Microsoft Flight Simulator Texture Data
Microsoft Flight Simulator OAV Texture Data
IBM LinkWay Object

The .oab filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

oxb (1), ob (1), oaf (1), lab (1), iab (1), ab (1), pab (1), oba (1), oav (1), oa (1), kab (1), aob (1)

Can't open a .oab file?

If you want to open a .oab file on your computer, you just need to have the appropriate program installed. If the .oab association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.oab

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android