My tracking of nearby ADSB-out aircraft using my local AWACS server.
Being within the KIAH Mode-C ring, all planes are required to have a squawkable transponder for the primary ATC radar.
Unfortunately, most of these planes are invisible without the 1090MHz transponder which allows for a MLAT(multi-lateration)
calculation with multiple base stations. Sometimes an ADSB-IN aircraft is flying nearby which will activate
a ADSB-R (rebroadcast). The traffic within several miles and within 5000' of the aircraft will be rebroadcast meaning
that my AWACS system can now see the ground traffic at major airports as well as random signatures for the remainder of
the transponder only flights.
UAL/UA - United Airlines : 597
SWA/WN - Southwest Airlines : 465
AAL/AA - American Airlines : 192
ASH/YV - Mesa Airlines : 176
UCA/C5 - CommutAir : 130
DAL/DL - Delta Air Lines : 126
SKW/OO - SkyWest : 123
NKS/NK - Spirit Airlines : 80
FFT/F9 - Frontier Airlines : 45
EJA/1I - NetJets : 35
ENY/MQ - Envoy Air : 23
VOI/Y4 - Volaris : 19
AMX/AM - AeroMéxico : 18
LXJ/ - Flexjet : 16
SLI/5D - AeroMexico Connect : 15
VIV/VB - Aeroenlaces Nacionales : 15
JBU/B6 - JetBlue Airways : 15
AAY/G4 - Allegiant Air : 14
ACA/AC - Air Canada : 13
ASA/AS - Alaska Airlines : 13
FDX/FX - Federal Express : 13
ATN/8C - Air Transport International : 11
UPS/5X - United Parcel Service : 11
SCX/SY - Sun Country Airlines : 8
ABX/GB - ABX Air : 7
CJT/W8 - Cargojet Airways : 7
VTM/ - Aeronaves TSM : 6
WJA/WS - WestJet : 6
TAI/TA - Taca International Airlines : 6
JSX/XE - JSX : 6
BAW/BA - British Airways : 5
EJM/ - Executive Jet Management : 5
THY/TK - Turkish Airlines : 5
EDV/9E - Endeavor Air : 5
SCM/ - American Jet International : 4
JIA/OH - PSA Airlines : 4
FFL/ - ForeFlight : 4
CMP/CM - Copa Airlines : 3
UAE/EK - Emirates : 3
HAL/HA - Hawaiian Airlines : 3
KLM/KL - KLM Royal Dutch Airlines : 3
DLH/LH - Lufthansa : 3
AFR/AF - Air France : 2
ANA/NH - All Nippon Airways : 2
AVA/AV - Avianca - Aerovias Nacionales de Colombia : 2
BYA/ - Berry Aviation : 2
CPA/CX - Cathay Pacific : 2
EVA/BR - EVA Air : 2
PAT/ - Department of the Army, Priority Air Transport : 2
QTR/QR - Qatar Airways : 2
NCR/N8 - National Air Cargo : 2
CWG/ - Wing Aviation : 2
ANZ/NZ - Air New Zealand : 1
CYO/ - Air Transport : 1
GTI/5Y - Atlas Air : 1
CLX/CV - Cargolux : 1
FRG/ - Freight Runners Express : 1
HER/UD - Hex'Air : 1
CKS/K4 - Kalitta Air : 1
GEC/LH - Lufthansa Cargo : 1
SCW/ - Malmo Aviation : 1
SCW/TF - Malmö Aviation : 1
LBQ/ - Quest Diagnostics : 1
RPA/RW - Republic Airlines : 1
YEL/YE - Yellowtail : 1
TWY/ - Sunset Aviation, LLC : 1
Since it's more expensive to add ADSB-in capability and not required by the FAA many planes don't have this.
Fortunately, using almost the same setup as my home AWACS system Stratux
can supplement your electronic flight bag. I'm currently using Avare
with the external i/o plugin to connect to the
homebuilt stratux.