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 : 499
SWA/WN - Southwest Airlines : 403
AAL/AA - American Airlines : 202
UCA/C5 - CommutAir : 135
ASH/YV - Mesa Airlines : 134
DAL/DL - Delta Air Lines : 116
SKW/OO - SkyWest : 92
NKS/NK - Spirit Airlines : 68
ENY/MQ - Envoy Air : 46
FDX/FX - Federal Express : 42
UPS/5X - United Parcel Service : 34
EJA/1I - NetJets : 27
JBU/B6 - JetBlue Airways : 25
AMX/AM - AeroMéxico : 23
FFT/F9 - Frontier Airlines : 22
VOI/Y4 - Volaris : 22
SCX/SY - Sun Country Airlines : 21
VIV/VB - Aeroenlaces Nacionales : 13
LXJ/ - Flexjet : 13
ATN/8C - Air Transport International : 11
JSX/XE - JSX : 10
ACA/AC - Air Canada : 9
VTM/ - Aeronaves TSM : 9
JZA/QK - Air Canada Jazz : 9
AJT/M6 - Amerijet International : 8
SLI/5D - AeroMexico Connect : 7
RPA/RW - Republic Airlines : 7
SWQ/ - Swift Air (Interstate Equipment Leasing) : 7
CWG/ - Wing Aviation : 6
AAY/G4 - Allegiant Air : 5
GTI/5Y - Atlas Air : 5
SCM/ - American Jet International : 5
CJT/W8 - Cargojet Airways : 5
JTL/ - Jet Linx Aviation : 5
ANA/NH - All Nippon Airways : 4
ASA/AS - Alaska Airlines : 4
BAW/BA - British Airways : 4
BYA/ - Berry Aviation : 4
DCM/ - FLTPLAN : 4
KLM/KL - KLM Royal Dutch Airlines : 4
DLH/LH - Lufthansa : 4
WJA/WS - WestJet : 4
GAJ/ - Wheels Up - Gama Aviation : 4
TAI/TA - Taca International Airlines : 4
FTH/ - Mountain Aviation : 4
ABX/GB - ABX Air : 3
LET/ - Aerolineas Ejecutivas : 3
CLX/CV - Cargolux : 3
LBQ/ - Quest Diagnostics : 3
THY/TK - Turkish Airlines : 3
FFL/ - ForeFlight : 3
AFR/AF - Air France : 2
AJI/ - Ameristar Jet Charter : 2
UAE/EK - Emirates : 2
EAL/EA - European Air Express : 2
VTS/ - Everts Air Alaska/Everts Air Cargo : 2
EJM/ - Executive Jet Management : 2
MAA/M7 - MasAir : 2
QTR/QR - Qatar Airways : 2
SWG/WG - Sunwing Airlines : 2
TOM/BY - Thomson Airways : 2
JUS/U7 - USA Jet Airlines : 2
XOJ/ - Xojet : 2
XSR/ - Executive AirShare : 2
EDV/9E - Endeavor Air : 2
DPJ/ - Wheels Up Private Jets : 2
EDG/ - Jet Edge : 2
TWY/ - Sunset Aviation, LLC : 2
TNO/ - Aerotransporte de Carga Union : 1
NGF/ - Angel Flight America : 1
XAA/ - Aeronautical Radio Inc : 1
CYO/ - Air Transport : 1
BVN/ - Baron Aviation Services : 1
CPA/CX - Cathay Pacific : 1
CMP/CM - Copa Airlines : 1
EMD/ - Eaglemed (Ballard Aviation) : 1
FRG/ - Freight Runners Express : 1
KAL/KE - Korean Air : 1
GEC/LH - Lufthansa Cargo : 1
NTW/CE - Nationwide Airlines : 1
PAT/ - Department of the Army, Priority Air Transport : 1
RAX/ - Royal Air Freight : 1
SIA/SQ - Singapore Airlines : 1
RSP/ - Jet Suite : 1
CNS/ - Cobalt Air : 1
CVK/ - CAVOK 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.