"The Hex Holes" -- Latest List Unknown Mode-S Addresses - 1 Dec 2015 Update

For years in my former Monitoring Times Milcom column, I documented 225-400 MHz UHF spectrum holes (see page above for latest spectrum hole).

Now I have discovered what appears to be holes in DoD Mode-S addresses. These aircraft are flying, but there never seems to be any tie-ups. One can speculate that they are covert aircraft, sensitive mission aircraft, temp mission addresses, aerial refueling tankers on SpecOps missions, etc. Some of the addresses in and around the addresses below have been tie-up with SpecOps aircraft, and FEST aircraft. Bottom line: these Mode-S addresses are ones to watch real close. I will call this list from now on the "Hex Hole" list. Catchy huh!

In future ipdates to this blog I will share those Mode-S address "hex holes"  below that have been discovered on our Btown box and from others that have Mode-S boxes worldwide. If you discover a tie up for any of these Mode-S addresses or you have a new "hex hole" you want to share, please drop us an email at the address in the masthead. For right now please limit these "hex holes" to the US Military/Government series of hex codes (roughly between ADFC60 and prior to AFFFF0).

Latest Hex Hole List 1 Dec 2015

Here is the latest "hex hole" list that I have in my database. Some of these may be new aircraft series just now testing or coming off the production line and some may be, well let's just say -- we don't know. Any tie ups would be sincerely appreciated.

ADFC00  ADFD14-ADFD1F ADFD2F ADFD3F ADFD40 ADFD41 ADFD60-ADFD64  ADFD67-ADFD69  ADFDAA  ADFDAB  ADFDAD  ADFDAE 

ADFDB0  ADFDB2  ADFDBC  ADFDBD  ADFDE5  ADFDF6  ADFDF7  ADFDFB
ADFDFC  ADFE01-ADFE05 ADFE08 ADFE09 ADFE0B ADFE28  ADFE2C  ADFE30  ADFE38  ADFE39  ADFE3A  ADFE50  ADFE58  ADFEAF  ADFEB0-ADFEB2  ADFEE3  ADFEE5  ADFEF0  ADFEF9  ADFF02  AE0103  AE01A2  AE01A3 AE01A5-AE01A9  AE028A  AE040C  AE042F  AE0431  AE0432  AE0435  AE043B  AE043D  AE043E  AE043F AE0440  AE0441  AE0445  AE0447  AE0448  AE08CE  AE06D1  AE075B  AE0797  AE083F  AE0946-AE0948  AE097F  AE09B3

AE09C8  AE0A59  AE0AA6  AE0AAA  AE0AB3  AE0AB6  AE0ABA  AE0B18
AE0B1B  AE0B1D  AE0B87  AE0B94  AE0BA8  AE0D08  AE0D0E  AE0D21
AE0D5B  AE0D62  AE0D6A  AE0D6E  AE0DF7  AE0E2C  AE0ED4  AE0FF4
AE104E  AE1055  AE115F  AE11CE  AE11CF  AE11D1  AE11D4  AE11F1  AE11F3-AE11F5  AE11F9  AE120D  AE1243  AE1249  AE13CD  AE13D3  AE13DE  AE14D5-AE14D7  AE14E1  AE1514  AE168C  AE171E  AE171F  AE1766  AE1780  AE1887  AE1898  AE1A40  AE1B05  AE1B12  AE1C11  AE1CAC  AE1CB0  AE1CB3  AE1CB4  AE1CCE  AE1CE8  AE1DCE  AE1DD8 

AE1DDC  AE1DE4  AE1DF3  AE1E2A  AE1E69  AE1EFA  AE1F1F  AE205C  AE21E0  AE261C  AE261F  AE2623  AE2654  AE2776  AE277A  AE277E
AE278D  AE278F  AE2792  AE279A  AE27BC  AE2939  AE2BDA  AE2BDC
AE2BE6  AE2FD6  AE2FD9  AE35F9  AE3925  AE42CE  AE4403  AE47A2
AE47DB  AE4830  AE49BE  AE49F2  AE49F6  AE49F7  AE49F9  AE49FD
AE4A01  AE4A02  AE4A04  AE4A05  AE4A2D  AE4A85  AE4AB5  AE4BEF
AE4D35  AE4D51  AE4D55  AE4D56  AE4D60-AE4D65  AE4D6D-AE4D6F
AE4D9A AE4DD0-AE4DDC  AE4DDE  AE4DDF  AE4E2E  AE4E8C  AE4F1E
AE4F20  AE4F21  AE4F26  AE4F28  AE4F2C  AE4F2D AE4F30  AE4F34  AE4F38
AE4F3F  AE4F41  AE4F42  AE4F53  AE4F6F  AE4F7A  AE4F80  AE4F82  AE4F83
AE4F86  AE4F8F  AE4F90  AE4F92  AE4F96  AE4F9C  AE4FA6  AE4FAA  AE4FAB  AE4FAF  AE4FB1  AE4FBF  AE4FC3  AE4FCB  AE4FCD  AE5133
AE5208  AE5238  AE52C7  AE5316  AE531C  AE531D  AE5355  AE53B0  AE53D2
AE53FB  AE5412  AE5422  AE5477  AE5480  AE54B5  AE54C2  AE54C4  AE54C9  AE571F  AE5737  AE5738  AE573B  AE573D  AE5744  AE578D
AE578E  AE57B3  AE58C0  AE58D1  AE58DE  AE58E0-AE58E2  AE58E4-AE58E6  AE58ED  AE5962  AE596D  AE596E  AE598E  AE5997-AE5999   AE599B-AE599D  AE599F  AE5A37  AE5B44  AE5B49  AE5BCA  AE5C14-AE5C16  AE5EE7  AE6200  AE6424  AE65E1  AE702E  AE8034  AE8582  AE89B0  AE89B1  AE9793   AE99FB  AF1983