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 : 569
SWA/WN - Southwest Airlines : 419
ASH/YV - Mesa Airlines : 195
AAL/AA - American Airlines : 188
DAL/DL - Delta Air Lines : 140
UCA/C5 - CommutAir : 120
SKW/OO - SkyWest : 86
NKS/NK - Spirit Airlines : 47
EJA/1I - NetJets : 39
FDX/FX - Federal Express : 31
UPS/5X - United Parcel Service : 28
VOI/Y4 - Volaris : 21
LXJ/ - Flexjet : 18
FFT/F9 - Frontier Airlines : 18
AMX/AM - AeroMéxico : 15
JBU/B6 - JetBlue Airways : 15
ENY/MQ - Envoy Air : 15
ACA/AC - Air Canada : 14
ASA/AS - Alaska Airlines : 13
ATN/8C - Air Transport International : 12
VIV/VB - Aeroenlaces Nacionales : 9
VTM/ - Aeronaves TSM : 8
CJT/W8 - Cargojet Airways : 8
JIA/OH - PSA Airlines : 8
JSX/XE - JSX : 8
SLI/5D - AeroMexico Connect : 5
GTI/5Y - Atlas Air : 5
RPA/RW - Republic Airlines : 5
SCX/SY - Sun Country Airlines : 5
JUS/U7 - USA Jet Airlines : 5
WJA/WS - WestJet : 5
ABX/GB - ABX Air : 4
HAL/HA - Hawaiian Airlines : 4
DLH/LH - Lufthansa : 4
TAI/TA - Taca International Airlines : 4
AFR/AF - Air France : 3
LET/ - Aerolineas Ejecutivas : 3
SCM/ - American Jet International : 3
KLM/KL - KLM Royal Dutch Airlines : 3
EDV/9E - Endeavor Air : 3
FFL/ - ForeFlight : 3
ANA/NH - All Nippon Airways : 2
ANZ/NZ - Air New Zealand : 2
XAA/ - Aeronautical Radio Inc : 2
BAW/BA - British Airways : 2
EVA/BR - EVA Air : 2
UAE/EK - Emirates : 2
EJM/ - Executive Jet Management : 2
QTR/QR - Qatar Airways : 2
THY/TK - Turkish Airlines : 2
CWG/ - Wing Aviation : 2
RDK/ - Memorial Hermann Hospital System : 2
TWY/ - Sunset Aviation, LLC : 2
AJI/ - Ameristar Jet Charter : 1
AMF/A8 - Ameriflight : 1
ARF/GV - Aero Flight : 1
CYO/ - Air Transport : 1
BYA/ - Berry Aviation : 1
CMP/CM - Copa Airlines : 1
EAL/EA - European Air Express : 1
LBQ/ - Quest Diagnostics : 1
RAX/ - Royal Air Freight : 1
JAS/ - Jet Aviation Flight Services : 1
JTL/ - Jet Linx Aviation : 1
CNS/ - Cobalt Air : 1
CNV/ - US Navy Air Logistics Office : 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.