Where Has Treasury Gone?

A lot of folks are wondering what has happened to radio traffic from the various bureaus of the Treasury Department, and particularly the IRS. In the March, 2007 Monitoring Times, I tried to answer that question.

Sometime in the late 1990’s many of the radio frequencies used by the IRS seemed to go silent. Looking back, this seemed to occur about the same time that various reforms in the IRS organization were signed in to law. The IRS Restructuring and Reform Act of 1998 may have changed what the various divisions of the IRS were responsible for and may have changed their radio communications needs. Shortly after these frequencies seemed to go silent, the Treasury Department also entered in to a plan to consolidate and restructure their radio communications system. They had originally started a pilot project to develop their own integrated wireless network, however they have since joined forces with the Justice Department’s IWN project.

But where are the Treasury and IRS communications today? The only thing I have actually confirmed as being active with the IRS lately is the Treasury Inspector General for Tax Administration or TIGTA, http://www.treas.gov/tigta/. TIGTA was created when the 1998 IRS Restructuring and Reform act was passed. TIGTA has two frequencies that they have been heard using. One is a repeater on 164.5375 MHz with 172.6375 MHz input and the other is also a repeater, but on 165.9500 MHz with 167.0000 MHz as the input. I have also received information, but not confirmed, that TIGTA may be using 165.3375 MHz as a tactical frequency. However, since the IWN trunked system has become active in the Portland, OR region, these frequences have been rarely heard.

I recently came across this report from the Treasury Department's Wireless Program Office. You can read the brief report here:
http://www.ntia.doc.gov/osmhome/spectrumreform/Spectrum_Progress_Reports_FY2008/Treasury_FY08_Progress_Report_Policy_Initiative.pdf. In this report, there is a clear indication that some agencies of the Treasury have moved to commercial cellular and mobile data communications systems rather than continue using federal land-mobile systems.

Treasury Department communications are out there, but they may have begun to shift frequencies, perhaps in anticipation of the future Integrated Wireless Network. So keep in mind that the Treasury and IRS communications could have moved. But here is a list of previously known Treasury frequencies, so check these out and see if anything is active in your area:

163.1250
164.1000
164.2500
164.5375
165.9125
165.9500
166.2000
166.4625 - TREASURY COMMON
166.5375
166.5875
166.9750
167.0000 - NATIONWIDE ASSIGNMENT
167.1000
167.1500
167.9750
172.6375
173.0250
173.8625
411.5250
411.5500
412.2250
414.3250
414.7000
414.9000 - NATIONWIDE ASSIGNMENT
415.0000 - NATIONWIDE ASSIGNMENT
415.1000 - NATIONWIDE ASSIGNMENT
415.4250
415.5500
415.7250 - NATIONWIDE ASSIGNMENT
415.8000
415.8750
416.8000 - NATIONWIDE ASSIGNMENT
417.6500
418.1000
418.1750 - NATIONWIDE ASSIGNMENT
418.2000 - NATIONWIDE ASSIGNMENT
418.2250 - NATIONWIDE ASSIGNMENT
418.2500 - NATIONWIDE ASSIGNMENT

More From Houston-Updated

Just getting ready to depart the Houston area from IAH, and found a few interesting items.

168.9250 MHz, 167.9 and 171.1750 MHz, 167.9 are both keying up with no audio, sometimes noise on the input side. Both frequencies appear to be repeater outputs, but 171.1750 MHz is giving me Close Call hits at IAH (George Bush Intercontinental Airport), so it's very near there.

Caught some simplex P-25 traffic on 414.5625 MHz, NAC 168. No idea who this might be as it was encrypted and I have nothing on this frequency being assigned to anyone.

And caught 169.3000 MHz, with a NAC of N009 several times. This is the TSA frequency that is normally used as an input to a repeater on 172.9000 MHz. However N009 appears to be used on this frequency in the simplex mode. First time I've caught this in use.

And while waiting in Terminal A for my flight, I heard an analog repeater key up with a noisy input on 172.9000 MHz, no PL tone. Yes, that is the TSA repeater frequency, but it was clearly getting keyed up in analog. The signal strength seemed to indicate that the repeater was not located at IAH, but probably near by.