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 : 550
SWA/WN - Southwest Airlines : 404
AAL/AA - American Airlines : 205
ASH/YV - Mesa Airlines : 162
DAL/DL - Delta Air Lines : 131
UCA/C5 - CommutAir : 108
SKW/OO - SkyWest : 96
NKS/NK - Spirit Airlines : 77
ENY/MQ - Envoy Air : 72
EJA/1I - NetJets : 48
JBU/B6 - JetBlue Airways : 31
FDX/FX - Federal Express : 29
VOI/Y4 - Volaris : 22
AMX/AM - AeroMéxico : 21
VTM/ - Aeronaves TSM : 20
FFT/F9 - Frontier Airlines : 20
UPS/5X - United Parcel Service : 20
VIV/VB - Aeroenlaces Nacionales : 19
LXJ/ - Flexjet : 16
ACA/AC - Air Canada : 15
ATN/8C - Air Transport International : 14
JSX/XE - JSX : 12
SWQ/ - Swift Air (Interstate Equipment Leasing) : 11
AAY/G4 - Allegiant Air : 10
GTI/5Y - Atlas Air : 9
ASA/AS - Alaska Airlines : 8
SCX/SY - Sun Country Airlines : 8
SLI/5D - AeroMexico Connect : 7
BAW/BA - British Airways : 6
CJT/W8 - Cargojet Airways : 6
EJM/ - Executive Jet Management : 6
THY/TK - Turkish Airlines : 6
WJA/WS - WestJet : 6
AJT/M6 - Amerijet International : 5
BYA/ - Berry Aviation : 5
UAE/EK - Emirates : 5
DLH/LH - Lufthansa : 5
CWG/ - Wing Aviation : 5
JIA/OH - PSA Airlines : 4
EDV/9E - Endeavor Air : 4
TAI/TA - Taca International Airlines : 4
AFR/AF - Air France : 3
ANZ/NZ - Air New Zealand : 3
LET/ - Aerolineas Ejecutivas : 3
QTR/QR - Qatar Airways : 3
JUS/U7 - USA Jet Airlines : 3
JTL/ - Jet Linx Aviation : 3
EDG/ - Jet Edge : 3
AJI/ - Ameristar Jet Charter : 2
AMF/A8 - Ameriflight : 2
ANA/NH - All Nippon Airways : 2
XAA/ - Aeronautical Radio Inc : 2
BOE/ - Boeing : 2
EVA/BR - EVA Air : 2
DCM/ - FLTPLAN : 2
KLM/KL - KLM Royal Dutch Airlines : 2
QFA/QF - Qantas : 2
LBQ/ - Quest Diagnostics : 2
RPA/RW - Republic Airlines : 2
RAX/ - Royal Air Freight : 2
SIA/SQ - Singapore Airlines : 2
VIR/VS - Virgin Atlantic Airways : 2
XSR/ - Executive AirShare : 2
FFL/ - ForeFlight : 2
CNS/ - Cobalt Air : 2
FTH/ - Mountain Aviation : 2
TWY/ - Sunset Aviation, LLC : 2
ABX/GB - ABX Air : 1
CYO/ - Air Transport : 1
RCH/MC - Air Mobility Command : 1
TAA/ - Aeroservicios de La Costa : 1
CLX/CV - Cargolux : 1
CAL/CI - China Airlines : 1
CMP/CM - Copa Airlines : 1
FRG/ - Freight Runners Express : 1
JNY/ - Jenney Beechcraft : 1
GEC/LH - Lufthansa Cargo : 1
SWG/WG - Sunwing Airlines : 1
BOX/3S - Aerologic : 1
GAJ/ - Wheels Up - Gama Aviation : 1
FWR/ - Flight Aware : 1
BBA/ - Bombardier : 1
CNV/ - US Navy Air Logistics Office : 1
STV/ - Saturn 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.