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 : 536
SWA/WN - Southwest Airlines : 384
AAL/AA - American Airlines : 184
ASH/YV - Mesa Airlines : 166
UCA/C5 - CommutAir : 115
DAL/DL - Delta Air Lines : 114
SKW/OO - SkyWest : 98
NKS/NK - Spirit Airlines : 61
EJA/1I - NetJets : 45
FDX/FX - Federal Express : 25
FFT/F9 - Frontier Airlines : 25
UPS/5X - United Parcel Service : 23
JBU/B6 - JetBlue Airways : 22
ENY/MQ - Envoy Air : 22
AMX/AM - AeroMéxico : 20
LXJ/ - Flexjet : 19
VOI/Y4 - Volaris : 18
WJA/WS - WestJet : 16
ACA/AC - Air Canada : 14
VIV/VB - Aeroenlaces Nacionales : 12
ASA/AS - Alaska Airlines : 11
ATN/8C - Air Transport International : 11
SLI/5D - AeroMexico Connect : 9
CJT/W8 - Cargojet Airways : 7
SCX/SY - Sun Country Airlines : 6
TAI/TA - Taca International Airlines : 6
JSX/XE - JSX : 6
BAW/BA - British Airways : 5
LET/ - Aerolineas Ejecutivas : 4
HAL/HA - Hawaiian Airlines : 4
THY/TK - Turkish Airlines : 4
JTL/ - Jet Linx Aviation : 4
FFL/ - ForeFlight : 4
ABX/GB - ABX Air : 3
EJM/ - Executive Jet Management : 3
KLM/KL - KLM Royal Dutch Airlines : 3
JIA/OH - PSA Airlines : 3
CWG/ - Wing Aviation : 3
TWY/ - Sunset Aviation, LLC : 3
ANA/NH - All Nippon Airways : 2
ANZ/NZ - Air New Zealand : 2
CYO/ - Air Transport : 2
EVA/BR - EVA Air : 2
UAE/EK - Emirates : 2
VTS/ - Everts Air Alaska/Everts Air Cargo : 2
DCM/ - FLTPLAN : 2
DLH/LH - Lufthansa : 2
OAE/OY - Omni Air International : 2
QTR/QR - Qatar Airways : 2
SWG/WG - Sunwing Airlines : 2
RDK/ - Memorial Hermann Hospital System : 2
AAY/G4 - Allegiant Air : 1
AFR/AF - Air France : 1
AJI/ - Ameristar Jet Charter : 1
AMF/A8 - Ameriflight : 1
VTM/ - Aeronaves TSM : 1
JZA/QK - Air Canada Jazz : 1
SCM/ - American Jet International : 1
TSC/TS - Air Transat : 1
CMP/CM - Copa Airlines : 1
EMD/ - Eaglemed (Ballard Aviation) : 1
FLC/ - FINFO Flight Inspection Aircraft : 1
GEC/LH - Lufthansa Cargo : 1
LBQ/ - Quest Diagnostics : 1
RAX/ - Royal Air Freight : 1
JUS/U7 - USA Jet Airlines : 1
TYS/YO - TransHolding System : 1
XSR/ - Executive AirShare : 1
BOX/3S - Aerologic : 1
KAY/ - K5 Aviation GmbH : 1
CNS/ - Cobalt Air : 1
FTH/ - Mountain Aviation : 1
ACW/ - SERVICIOS AEREOS ACROSS, S.A. DE C.V. : 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.