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 : 625
SWA/WN - Southwest Airlines : 369
AAL/AA - American Airlines : 184
ASH/YV - Mesa Airlines : 165
UCA/C5 - CommutAir : 137
DAL/DL - Delta Air Lines : 132
SKW/OO - SkyWest : 95
NKS/NK - Spirit Airlines : 59
EJA/1I - NetJets : 46
JBU/B6 - JetBlue Airways : 35
UPS/5X - United Parcel Service : 29
LXJ/ - Flexjet : 23
FDX/FX - Federal Express : 23
VTM/ - Aeronaves TSM : 20
ASA/AS - Alaska Airlines : 19
ACA/AC - Air Canada : 18
VOI/Y4 - Volaris : 16
WJA/WS - WestJet : 16
ATN/8C - Air Transport International : 14
AMX/AM - AeroMéxico : 11
FFT/F9 - Frontier Airlines : 11
VIV/VB - Aeroenlaces Nacionales : 10
SLI/5D - AeroMexico Connect : 9
ENY/MQ - Envoy Air : 9
RPA/RW - Republic Airlines : 7
CJT/W8 - Cargojet Airways : 6
EJM/ - Executive Jet Management : 6
THY/TK - Turkish Airlines : 6
TAI/TA - Taca International Airlines : 6
RDK/ - Memorial Hermann Hospital System : 6
JSX/XE - JSX : 6
TWY/ - Sunset Aviation, LLC : 6
GTI/5Y - Atlas Air : 5
LET/ - Aerolineas Ejecutivas : 5
JIA/OH - PSA Airlines : 5
AFR/AF - Air France : 4
CMP/CM - Copa Airlines : 4
JTL/ - Jet Linx Aviation : 4
AAY/G4 - Allegiant Air : 3
ABX/GB - ABX Air : 3
BYA/ - Berry Aviation : 3
QTR/QR - Qatar Airways : 3
RAX/ - Royal Air Freight : 3
JUS/U7 - USA Jet Airlines : 3
XSR/ - Executive AirShare : 3
EDV/9E - Endeavor Air : 3
CWG/ - Wing Aviation : 3
FFL/ - ForeFlight : 3
CAP/ - Civil Air Patrol : 3
CNS/ - Cobalt Air : 3
AJT/M6 - Amerijet International : 2
AMF/A8 - Ameriflight : 2
ANA/NH - All Nippon Airways : 2
ANZ/NZ - Air New Zealand : 2
AVA/AV - Avianca - Aerovias Nacionales de Colombia : 2
BAW/BA - British Airways : 2
EVA/BR - EVA Air : 2
KLM/KL - KLM Royal Dutch Airlines : 2
DLH/LH - Lufthansa : 2
LBQ/ - Quest Diagnostics : 2
SCX/SY - Sun Country Airlines : 2
AJI/ - Ameristar Jet Charter : 1
XAA/ - Aeronautical Radio Inc : 1
CYO/ - Air Transport : 1
SCM/ - American Jet International : 1
TAA/ - Aeroservicios de La Costa : 1
CLX/CV - Cargolux : 1
CAL/CI - China Airlines : 1
UAE/EK - Emirates : 1
EAL/EA - European Air Express : 1
DCM/ - FLTPLAN : 1
HER/UD - Hex'Air : 1
IBE/IB - Iberia Airlines : 1
GEC/LH - Lufthansa Cargo : 1
SCW/ - Malmo Aviation : 1
SCW/TF - Malmö Aviation : 1
POE/PD - Porter Airlines : 1
PAT/ - Department of the Army, Priority Air Transport : 1
USC/ - US Check Airlines : 1
YEL/YE - Yellowtail : 1
ROU/RV - Air Canada Rouge : 1
FWK/ - Flightworks : 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.