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 : 618
SWA/WN - Southwest Airlines : 524
AAL/AA - American Airlines : 281
DAL/DL - Delta Air Lines : 202
ASH/YV - Mesa Airlines : 188
UCA/C5 - CommutAir : 107
NKS/NK - Spirit Airlines : 98
SKW/OO - SkyWest : 98
EJA/1I - NetJets : 53
FFT/F9 - Frontier Airlines : 50
JBU/B6 - JetBlue Airways : 49
ENY/MQ - Envoy Air : 48
FDX/FX - Federal Express : 43
ASA/AS - Alaska Airlines : 25
ACA/AC - Air Canada : 18
LXJ/ - Flexjet : 18
VOI/Y4 - Volaris : 18
UPS/5X - United Parcel Service : 17
VIV/VB - Aeroenlaces Nacionales : 16
AAY/G4 - Allegiant Air : 15
WJA/WS - WestJet : 15
AMX/AM - AeroMéxico : 13
VTM/ - Aeronaves TSM : 12
GTI/5Y - Atlas Air : 12
SLI/5D - AeroMexico Connect : 11
ATN/8C - Air Transport International : 9
JSX/XE - JSX : 9
CJT/W8 - Cargojet Airways : 8
ABX/GB - ABX Air : 7
SCX/SY - Sun Country Airlines : 7
BAW/BA - British Airways : 6
JIA/OH - PSA Airlines : 6
JTL/ - Jet Linx Aviation : 5
SCM/ - American Jet International : 4
TSC/TS - Air Transat : 4
CMP/CM - Copa Airlines : 4
RPA/RW - Republic Airlines : 4
JUS/U7 - USA Jet Airlines : 4
CWG/ - Wing Aviation : 4
ASN/ - RS SERVICIOS DE TELEDETECCION : 4
CYO/ - Air Transport : 3
UAE/EK - Emirates : 3
EJM/ - Executive Jet Management : 3
SWG/WG - Sunwing Airlines : 3
THY/TK - Turkish Airlines : 3
EDV/9E - Endeavor Air : 3
TAI/TA - Taca International Airlines : 3
CAP/ - Civil Air Patrol : 3
CNS/ - Cobalt Air : 3
AFR/AF - Air France : 2
ANA/NH - All Nippon Airways : 2
ANZ/NZ - Air New Zealand : 2
BYA/ - Berry Aviation : 2
CLX/CV - Cargolux : 2
EVA/BR - EVA Air : 2
DCM/ - FLTPLAN : 2
KLM/KL - KLM Royal Dutch Airlines : 2
DLH/LH - Lufthansa : 2
SCW/ - Malmo Aviation : 2
SCW/TF - Malmö Aviation : 2
PAT/ - Department of the Army, Priority Air Transport : 2
QTR/QR - Qatar Airways : 2
SIA/SQ - Singapore Airlines : 2
ROU/RV - Air Canada Rouge : 2
RDK/ - Memorial Hermann Hospital System : 2
TWY/ - Sunset Aviation, LLC : 2
TNO/ - Aerotransporte de Carga Union : 1
NGF/ - Angel Flight America : 1
LET/ - Aerolineas Ejecutivas : 1
TAA/ - Aeroservicios de La Costa : 1
CAL/CI - China Airlines : 1
EAL/EA - European Air Express : 1
VTS/ - Everts Air Alaska/Everts Air Cargo : 1
GEC/LH - Lufthansa Cargo : 1
LBQ/ - Quest Diagnostics : 1
RAX/ - Royal Air Freight : 1
XOJ/ - Xojet : 1
XSR/ - Executive AirShare : 1
BOX/3S - Aerologic : 1
SBE/ - World Class Aviation : 1
FFL/ - ForeFlight : 1
FTH/ - Mountain Aviation : 1
ACW/ - SERVICIOS AEREOS ACROSS, S.A. DE C.V. : 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.