OPNET Technologies, Inc. Schedules Third Quarter Results Teleconference/Webcast for Wednesday, January 31, 2007

BETHESDA, MD – January 11, 2007 –OPNET Technologies, Inc. (NASDAQ: OPNT) will hold an investor conference call on Wednesday, January 31, 2007 at 5:00 pm Eastern Time to review financial results for the third quarter of fiscal 2007.

To listen to the OPNET investor conference call:

• Dial 877-407-9205 in the U.S. or 201-689-8054 for international callers, or
• Use the webcast at www.opnet.com, or at www.investorcalendar.com (click on OPNT under "VCalls by Date"). Investors are advised to go to the web site at least 15 minutes early to register, download, and install any necessary audio software.

To listen to the archived call:

• Dial the replay phone number at 877-660-6853 or 201-612-7415 for international callers. For replay, enter account # 286, conference ID # 227468.  The replay will be available from 7:00 pm Eastern Time January 31st through 11:59 pm Eastern Time February 6th.
• The webcast will be available at www.opnet.com or at www.investorcalendar.com, archived for seven days.

The third quarter of fiscal 2007 financial results will be released after the market closes on Wednesday, January 31, 2007.

About OPNET Technologies, Inc.
Founded in 1986, OPNET Technologies, Inc. (NASDAQ:OPNT) is a leading provider of management software for networks and applications. For more information about OPNET and its products, visit www.opnet.com.

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OPNET and OPNET Technologies, Inc. are trademarks of OPNET Technologies, Inc. All other trademarks are the property of their respective owners.

OPNET Media Contact:
Margarita Castillo
OPNET Technologies, Inc.
(240) 497-3000
Media@opnet.com
www.opnet.com

OPNET Investor Relations:
Mel Wesley
OPNET Technologies
(240) 497-3000
ir@opnet.com
www.opnet.com