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 : 583
SWA/WN - Southwest Airlines : 411
ASH/YV - Mesa Airlines : 170
DAL/DL - Delta Air Lines : 133
AAL/AA - American Airlines : 132
UCA/C5 - CommutAir : 129
SKW/OO - SkyWest : 107
NKS/NK - Spirit Airlines : 81
FFT/F9 - Frontier Airlines : 42
EJA/1I - NetJets : 26
AMX/AM - AeroMéxico : 19
VOI/Y4 - Volaris : 18
LXJ/ - Flexjet : 16
VIV/VB - Aeroenlaces Nacionales : 15
AAY/G4 - Allegiant Air : 14
FDX/FX - Federal Express : 14
ASA/AS - Alaska Airlines : 13
SLI/5D - AeroMexico Connect : 11
ATN/8C - Air Transport International : 11
UPS/5X - United Parcel Service : 11
JBU/B6 - JetBlue Airways : 10
ENY/MQ - Envoy Air : 9
ACA/AC - Air Canada : 7
CJT/W8 - Cargojet Airways : 7
THY/TK - Turkish Airlines : 7
BAW/BA - British Airways : 6
TAI/TA - Taca International Airlines : 6
JSX/XE - JSX : 6
SCM/ - American Jet International : 5
SCX/SY - Sun Country Airlines : 5
EDV/9E - Endeavor Air : 5
GTI/5Y - Atlas Air : 4
LET/ - Aerolineas Ejecutivas : 4
HAL/HA - Hawaiian Airlines : 4
QTR/QR - Qatar Airways : 4
WJA/WS - WestJet : 4
ABX/GB - ABX Air : 3
CMP/CM - Copa Airlines : 3
UAE/EK - Emirates : 3
KLM/KL - KLM Royal Dutch Airlines : 3
DLH/LH - Lufthansa : 3
JIA/OH - PSA Airlines : 3
XSR/ - Executive AirShare : 3
ANA/NH - All Nippon Airways : 2
AVA/AV - Avianca - Aerovias Nacionales de Colombia : 2
EVA/BR - EVA Air : 2
EJM/ - Executive Jet Management : 2
PAT/ - Department of the Army, Priority Air Transport : 2
RAX/ - Royal Air Freight : 2
YEL/YE - Yellowtail : 2
CWG/ - Wing Aviation : 2
JTL/ - Jet Linx Aviation : 2
AFR/AF - Air France : 1
AJI/ - Ameristar Jet Charter : 1
ANZ/NZ - Air New Zealand : 1
ARF/GV - Aero Flight : 1
VTM/ - Aeronaves TSM : 1
CYO/ - Air Transport : 1
BYA/ - Berry Aviation : 1
CLX/CV - Cargolux : 1
DCM/ - FLTPLAN : 1
SCW/ - Malmo Aviation : 1
SCW/TF - Malmö Aviation : 1
QFA/QF - Qantas : 1
LBQ/ - Quest Diagnostics : 1
SBE/ - World Class Aviation : 1
ASP/SP - Aspen Airways : 1
FWR/ - Flight Aware : 1
CAP/ - Civil Air Patrol : 1
CNS/ - Cobalt Air : 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.