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 : 614
SWA/WN - Southwest Airlines : 426
AAL/AA - American Airlines : 171
ASH/YV - Mesa Airlines : 168
UCA/C5 - CommutAir : 132
DAL/DL - Delta Air Lines : 114
SKW/OO - SkyWest : 102
NKS/NK - Spirit Airlines : 74
FFT/F9 - Frontier Airlines : 41
EJA/1I - NetJets : 25
AMX/AM - AeroMéxico : 21
ENY/MQ - Envoy Air : 20
VIV/VB - Aeroenlaces Nacionales : 17
VOI/Y4 - Volaris : 17
FDX/FX - Federal Express : 15
JBU/B6 - JetBlue Airways : 15
AAY/G4 - Allegiant Air : 12
LXJ/ - Flexjet : 12
ACA/AC - Air Canada : 11
UPS/5X - United Parcel Service : 11
SLI/5D - AeroMexico Connect : 9
ASA/AS - Alaska Airlines : 9
SCX/SY - Sun Country Airlines : 9
ATN/8C - Air Transport International : 8
CJT/W8 - Cargojet Airways : 7
THY/TK - Turkish Airlines : 6
TAI/TA - Taca International Airlines : 6
JSX/XE - JSX : 6
VTM/ - Aeronaves TSM : 5
BAW/BA - British Airways : 5
WJA/WS - WestJet : 5
CMP/CM - Copa Airlines : 4
HAL/HA - Hawaiian Airlines : 4
JTL/ - Jet Linx Aviation : 4
ABX/GB - ABX Air : 3
AFR/AF - Air France : 3
GTI/5Y - Atlas Air : 3
UAE/EK - Emirates : 3
EJM/ - Executive Jet Management : 3
RPA/RW - Republic Airlines : 3
ANA/NH - All Nippon Airways : 2
AVA/AV - Avianca - Aerovias Nacionales de Colombia : 2
XAA/ - Aeronautical Radio Inc : 2
SCM/ - American Jet International : 2
CLX/CV - Cargolux : 2
EVA/BR - EVA Air : 2
DCM/ - FLTPLAN : 2
FRG/ - Freight Runners Express : 2
DLH/LH - Lufthansa : 2
XSR/ - Executive AirShare : 2
EDV/9E - Endeavor Air : 2
CWG/ - Wing Aviation : 2
TWY/ - Sunset Aviation, LLC : 2
NGF/ - Angel Flight America : 1
LET/ - Aerolineas Ejecutivas : 1
KLM/KL - KLM Royal Dutch Airlines : 1
JIA/OH - PSA Airlines : 1
QFA/QF - Qantas : 1
QTR/QR - Qatar Airways : 1
LBQ/ - Quest Diagnostics : 1
TPA/QT - TAMPA : 1
USC/ - US Check Airlines : 1
YEL/YE - Yellowtail : 1
NCR/N8 - National Air Cargo : 1
JAS/ - Jet Aviation Flight Services : 1
ASP/SP - Aspen Airways : 1
CAP/ - Civil Air Patrol : 1
ACW/ - SERVICIOS AEREOS ACROSS, S.A. DE C.V. : 1
SIS/ - Scott Aviation, LLC : 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.