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 : 615
SWA/WN - Southwest Airlines : 357
AAL/AA - American Airlines : 185
ASH/YV - Mesa Airlines : 159
DAL/DL - Delta Air Lines : 117
UCA/C5 - CommutAir : 116
SKW/OO - SkyWest : 78
NKS/NK - Spirit Airlines : 60
JBU/B6 - JetBlue Airways : 28
EJA/1I - NetJets : 27
ASA/AS - Alaska Airlines : 22
VOI/Y4 - Volaris : 22
FFT/F9 - Frontier Airlines : 19
VIV/VB - Aeroenlaces Nacionales : 18
WJA/WS - WestJet : 18
ACA/AC - Air Canada : 16
VTM/ - Aeronaves TSM : 16
ENY/MQ - Envoy Air : 15
LXJ/ - Flexjet : 14
ATN/8C - Air Transport International : 11
SLI/5D - AeroMexico Connect : 10
AMX/AM - AeroMéxico : 10
FDX/FX - Federal Express : 9
UPS/5X - United Parcel Service : 9
TAI/TA - Taca International Airlines : 8
GTI/5Y - Atlas Air : 7
BAW/BA - British Airways : 6
JIA/OH - PSA Airlines : 6
THY/TK - Turkish Airlines : 5
AFR/AF - Air France : 4
SCM/ - American Jet International : 4
CMP/CM - Copa Airlines : 4
QTR/QR - Qatar Airways : 4
JTL/ - Jet Linx Aviation : 4
CNS/ - Cobalt Air : 4
JSX/XE - JSX : 4
ABX/GB - ABX Air : 3
LET/ - Aerolineas Ejecutivas : 3
TSC/TS - Air Transat : 3
UAE/EK - Emirates : 3
EJM/ - Executive Jet Management : 3
KLM/KL - KLM Royal Dutch Airlines : 3
RPA/RW - Republic Airlines : 3
JUS/U7 - USA Jet Airlines : 3
EDV/9E - Endeavor Air : 3
AJT/M6 - Amerijet International : 2
ANA/NH - All Nippon Airways : 2
CJT/W8 - Cargojet Airways : 2
CLX/CV - Cargolux : 2
EVA/BR - EVA Air : 2
DCM/ - FLTPLAN : 2
FRG/ - Freight Runners Express : 2
CKS/K4 - Kalitta Air : 2
DLH/LH - Lufthansa : 2
SCX/SY - Sun Country Airlines : 2
XSR/ - Executive AirShare : 2
NCR/N8 - National Air Cargo : 2
RDK/ - Memorial Hermann Hospital System : 2
FFL/ - ForeFlight : 2
CNV/ - US Navy Air Logistics Office : 2
AJI/ - Ameristar Jet Charter : 1
ANZ/NZ - Air New Zealand : 1
CYO/ - Air Transport : 1
BYA/ - Berry Aviation : 1
CAY/KX - Cayman Airways : 1
VTS/ - Everts Air Alaska/Everts Air Cargo : 1
KFS/ - Kalitta Charters : 1
GEC/LH - Lufthansa Cargo : 1
OAE/OY - Omni Air International : 1
POE/PD - Porter Airlines : 1
QFA/QF - Qantas : 1
LBQ/ - Quest Diagnostics : 1
BOX/3S - Aerologic : 1
JAS/ - Jet Aviation Flight Services : 1
CWG/ - Wing Aviation : 1
TWY/ - Sunset Aviation, LLC : 1
ACW/ - SERVICIOS AEREOS ACROSS, S.A. DE C.V. : 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.