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 : 586
SWA/WN - Southwest Airlines : 384
AAL/AA - American Airlines : 188
ASH/YV - Mesa Airlines : 165
DAL/DL - Delta Air Lines : 127
UCA/C5 - CommutAir : 123
SKW/OO - SkyWest : 98
NKS/NK - Spirit Airlines : 65
EJA/1I - NetJets : 54
JBU/B6 - JetBlue Airways : 32
FDX/FX - Federal Express : 29
LXJ/ - Flexjet : 23
VOI/Y4 - Volaris : 22
ASA/AS - Alaska Airlines : 20
AMX/AM - AeroMéxico : 18
UPS/5X - United Parcel Service : 18
ACA/AC - Air Canada : 15
VIV/VB - Aeroenlaces Nacionales : 15
ATN/8C - Air Transport International : 14
FFT/F9 - Frontier Airlines : 14
WJA/WS - WestJet : 13
ENY/MQ - Envoy Air : 13
VTM/ - Aeronaves TSM : 10
SLI/5D - AeroMexico Connect : 9
TAI/TA - Taca International Airlines : 8
JSX/XE - JSX : 8
JIA/OH - PSA Airlines : 7
CJT/W8 - Cargojet Airways : 6
EJM/ - Executive Jet Management : 6
JUS/U7 - USA Jet Airlines : 6
GTI/5Y - Atlas Air : 5
RPA/RW - Republic Airlines : 5
SCX/SY - Sun Country Airlines : 5
AFR/AF - Air France : 4
DLH/LH - Lufthansa : 4
JTL/ - Jet Linx Aviation : 4
ABX/GB - ABX Air : 3
LET/ - Aerolineas Ejecutivas : 3
BAW/BA - British Airways : 3
FRG/ - Freight Runners Express : 3
THY/TK - Turkish Airlines : 3
EDV/9E - Endeavor Air : 3
CNS/ - Cobalt Air : 3
TWY/ - Sunset Aviation, LLC : 3
AAY/G4 - Allegiant Air : 2
ANA/NH - All Nippon Airways : 2
XAA/ - Aeronautical Radio Inc : 2
TAA/ - Aeroservicios de La Costa : 2
CLX/CV - Cargolux : 2
CMP/CM - Copa Airlines : 2
EVA/BR - EVA Air : 2
UAE/EK - Emirates : 2
KLM/KL - KLM Royal Dutch Airlines : 2
GEC/LH - Lufthansa Cargo : 2
QTR/QR - Qatar Airways : 2
LBQ/ - Quest Diagnostics : 2
RAX/ - Royal Air Freight : 2
XSR/ - Executive AirShare : 2
FFL/ - ForeFlight : 2
CNV/ - US Navy Air Logistics Office : 2
AJT/M6 - Amerijet International : 1
AMF/A8 - Ameriflight : 1
CYO/ - Air Transport : 1
SCM/ - American Jet International : 1
DCM/ - FLTPLAN : 1
JNY/ - Jenney Beechcraft : 1
SCW/ - Malmo Aviation : 1
SCW/TF - Malmö Aviation : 1
PAT/ - Department of the Army, Priority Air Transport : 1
NCR/N8 - National Air Cargo : 1
JAS/ - Jet Aviation Flight Services : 1
CWG/ - Wing Aviation : 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.