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 : 572
SWA/WN - Southwest Airlines : 406
ASH/YV - Mesa Airlines : 178
AAL/AA - American Airlines : 147
UCA/C5 - CommutAir : 103
DAL/DL - Delta Air Lines : 102
NKS/NK - Spirit Airlines : 64
SKW/OO - SkyWest : 63
ENY/MQ - Envoy Air : 44
EJA/1I - NetJets : 41
JBU/B6 - JetBlue Airways : 31
FDX/FX - Federal Express : 30
UPS/5X - United Parcel Service : 20
FFT/F9 - Frontier Airlines : 19
SLI/5D - AeroMexico Connect : 16
AMX/AM - AeroMéxico : 15
JSX/XE - JSX : 14
ACA/AC - Air Canada : 13
VIV/VB - Aeroenlaces Nacionales : 13
ASA/AS - Alaska Airlines : 11
VOI/Y4 - Volaris : 11
ATN/8C - Air Transport International : 10
GTI/5Y - Atlas Air : 10
LXJ/ - Flexjet : 9
CJT/W8 - Cargojet Airways : 9
WJA/WS - WestJet : 6
SCM/ - American Jet International : 5
QTR/QR - Qatar Airways : 5
CWG/ - Wing Aviation : 5
JTL/ - Jet Linx Aviation : 5
VTM/ - Aeronaves TSM : 4
LET/ - Aerolineas Ejecutivas : 4
RAX/ - Royal Air Freight : 4
SCX/SY - Sun Country Airlines : 4
SWQ/ - Swift Air (Interstate Equipment Leasing) : 4
JUS/U7 - USA Jet Airlines : 4
TWY/ - Sunset Aviation, LLC : 4
AFR/AF - Air France : 3
BAW/BA - British Airways : 3
BYA/ - Berry Aviation : 3
CMP/CM - Copa Airlines : 3
UAE/EK - Emirates : 3
THY/TK - Turkish Airlines : 3
EDV/9E - Endeavor Air : 3
CNS/ - Cobalt Air : 3
ABX/GB - ABX Air : 2
ANA/NH - All Nippon Airways : 2
ANZ/NZ - Air New Zealand : 2
EVA/BR - EVA Air : 2
KLM/KL - KLM Royal Dutch Airlines : 2
LRC/LR - LACSA : 2
DLH/LH - Lufthansa : 2
SIA/SQ - Singapore Airlines : 2
XSR/ - Executive AirShare : 2
TAI/TA - Taca International Airlines : 2
ASP/SP - Aspen Airways : 2
FTH/ - Mountain Aviation : 2
ACW/ - SERVICIOS AEREOS ACROSS, S.A. DE C.V. : 2
CNV/ - US Navy Air Logistics Office : 2
TNO/ - Aerotransporte de Carga Union : 1
AMF/A8 - Ameriflight : 1
NGF/ - Angel Flight America : 1
TSC/TS - Air Transat : 1
CLX/CV - Cargolux : 1
CAL/CI - China Airlines : 1
EJM/ - Executive Jet Management : 1
CKS/K4 - Kalitta Air : 1
JIA/OH - PSA Airlines : 1
QFA/QF - Qantas : 1
LBQ/ - Quest Diagnostics : 1
RPA/RW - Republic Airlines : 1
FFL/ - ForeFlight : 1
CAP/ - Civil Air Patrol : 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.