Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0E6C6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N15712 · BOEING 737-700 · operated by UNITED AIRLINES INC

Hex
A0E6C6
Octal
50163306
Decimal
10,544,838
Country
US
Tail
N15712
Type
B737
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
434
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S A0E6C6.

Country allocation

The ICAO 24-bit address A0E6C6 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
UAL752 - 7 2026-06-25
UAL661 United Airlines 7 2026-07-24
UAL2848 United Airlines 6 2026-07-19
UAL1852 United Airlines 6 2026-06-13
UAL1304 - 6 2026-07-06
UAL2243 United Airlines 5 2026-07-26
UAL1690 United Airlines 5 2026-07-24
UAL1513 United Airlines 5 2026-07-17
UAL1288 United Airlines 5 2026-07-26
UAL777 United Airlines 4 2026-05-25
UAL654 - 4 2026-06-25
UAL425 United Airlines 4 2026-05-12
UAL2453 United Airlines 4 2026-06-14
UAL2256 United Airlines 4 2026-07-02
UAL2071 - 4 2026-06-19
UAL1859 - 4 2026-06-30
UAL1798 United Airlines 4 2026-05-03
UAL1785 United Airlines 4 2026-05-02
UAL1324 - 4 2026-07-20
UAL1106 United Airlines 4 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1069 SFO → LAX Jul 26, 19:40 UTCJul 26, 20:30 UTC50m
2026-07-26 UAL1288 OGG → SFO Jul 26, 14:10 UTCJul 26, 17:40 UTC3h 30m
2026-07-26 UAL2243 SFO → EUG Jul 26, 03:20 UTCJul 26, 06:55 UTC3h 36m
2026-07-25 UAL541 UVF → ORD Jul 25, 17:25 UTCJul 25, 22:40 UTC5h 15m
2026-07-25 UAL449 ORD → PHL Jul 25, 15:40 UTCJul 25, 15:50 UTC10m
2026-07-25 UAL449 ORD → PHL Jul 25, 11:45 UTCJul 25, 12:25 UTC40m
2026-07-25 UAL2186 EWR → MSY Jul 25, 04:30 UTCJul 25, 09:05 UTC4h 35m
2026-07-24 UAL1690 EWR → PBI Jul 24, 21:20 UTCJul 25, 02:30 UTC5h 10m
2026-07-24 UAL661 ORD → EWR Jul 24, 14:05 UTCJul 24, 18:50 UTC4h 45m
2026-07-24 UAL308 ATL → EWR Jul 24, 01:40 UTCJul 24, 05:20 UTC3h 40m
2026-07-23 UAL2059 SFO → EWR Jul 23, 22:00 UTCJul 23, 23:30 UTC1h 30m
2026-07-23 UAL2059 SFO → EWR Jul 23, 22:06 UTCJul 23, 23:28 UTC1h 22m
2026-07-23 UAL1239 EWR → RDU Jul 23, 19:20 UTCJul 23, 20:35 UTC1h 15m
2026-07-23 UAL1288 OGG → SFO Jul 23, 14:10 UTCJul 23, 17:35 UTC3h 25m
2026-07-23 UAL2243 SFO → EUG Jul 23, 02:30 UTCJul 23, 06:10 UTC3h 40m
2026-07-22 UAL1316 EWR → MIA Jul 22, 22:45 UTCJul 23, 01:00 UTC2h 15m
2026-07-22 UAL2844 BWI → ORD Jul 22, 19:10 UTCJul 22, 21:20 UTC2h 10m
2026-07-22 UAL1502 EWR → ORD Jul 22, 14:15 UTCJul 22, 16:50 UTC2h 35m
2026-07-22 UAL1710 JAX → ORD Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-21 UAL630 BUF → ORD Jul 21, 23:50 UTCJul 22, 01:40 UTC1h 50m
2026-07-21 UAL630 BUF → ORD Jul 21, 23:30 UTCJul 21, 23:45 UTC15m
2026-07-21 UAL2485 ORD → DEN Jul 21, 20:25 UTCJul 21, 22:00 UTC1h 35m
2026-07-21 UAL2612 EWR → PHX Jul 21, 00:10 UTCJul 21, 18:25 UTC18h 15m
2026-07-20 UAL8213 IAH → TPA Jul 20, 19:55 UTCJul 20, 22:45 UTC2h 50m
2026-07-20 UAL1418 SFO → DEN Jul 20, 14:45 UTCJul 20, 17:20 UTC2h 35m
2026-07-20 UAL1343 - Jul 20, 10:20 UTCJul 20, 12:35 UTC2h 15m
2026-07-20 UAL1324 EWR → SRQ Jul 20, 02:20 UTCJul 20, 04:40 UTC2h 20m
2026-07-20 UAL1324 EWR → SRQ Jul 20, 01:57 UTCJul 20, 04:39 UTC2h 42m
2026-07-19 UAL2848 DOM → EWR Jul 19, 21:15 UTCJul 19, 23:50 UTC2h 35m
2026-07-19 UAL2848 DOM → EWR Jul 19, 21:16 UTCJul 19, 23:48 UTC2h 32m
2026-07-19 UAL1884 - Jul 19, 17:40 UTCJul 19, 19:30 UTC1h 50m
2026-07-19 UAL661 - Jul 19, 14:05 UTCJul 19, 15:20 UTC1h 15m
2026-07-18 UAL661 - Jul 18, 18:15 UTCJul 18, 23:00 UTC4h 45m
2026-07-17 UAL1690 EWR → PBI Jul 17, 23:30 UTCJul 18, 04:35 UTC5h 6m
2026-07-17 UAL1690 EWR → PBI Jul 17, 23:15 UTCJul 18, 04:34 UTC5h 19m
2026-07-17 UAL1513 IAH → SFO Jul 17, 18:44 UTCJul 17, 21:20 UTC2h 35m
2026-07-17 UAL1418 SFO → DEN Jul 17, 14:30 UTCJul 17, 16:59 UTC2h 30m
2026-07-17 UAL1343 - Jul 17, 10:20 UTCJul 17, 12:40 UTC2h 20m
2026-07-17 UAL1324 EWR → SRQ Jul 17, 01:00 UTCJul 17, 03:25 UTC2h 25m
2026-07-16 UAL2848 - Jul 16, 21:00 UTCJul 16, 22:59 UTC2h 0m
2026-07-16 UAL2848 BNA → EWR Jul 16, 20:51 UTCJul 16, 22:58 UTC2h 7m
2026-07-16 UAL1884 EWR → BNA Jul 16, 17:20 UTCJul 16, 18:59 UTC1h 40m
2026-07-10 UAL554 - Jul 10, 04:00 UTCJul 10, 05:10 UTC1h 10m
2026-07-10 UAL554 CLE → EWR Jul 10, 03:56 UTCJul 10, 05:15 UTC1h 19m
2026-07-10 UAL8111 EWR → CLE Jul 10, 00:50 UTCJul 10, 01:55 UTC1h 5m
2026-07-09 UAL1513 - Jul 9, 19:20 UTCJul 9, 22:55 UTC3h 35m
2026-07-09 UAL1418 - Jul 9, 15:15 UTCJul 9, 17:45 UTC2h 30m
2026-07-09 UAL1343 - Jul 9, 10:05 UTCJul 9, 12:25 UTC2h 20m
2026-07-09 UAL1324 EWR → SRQ Jul 9, 01:40 UTCJul 9, 04:00 UTC2h 20m
2026-07-08 UAL554 - Jul 8, 23:15 UTCJul 9, 00:15 UTC1h 0m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N15712 page for operator, model, and routing details .

Mode-S A0E6C6 frequently asked

What is Mode-S code A0E6C6?
A0E6C6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N15712.
Where is Mode-S A0E6C6 registered?
Mode-S code A0E6C6 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A0E6C6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0E6C6, octal 50163306, decimal 10,544,838.
What flights does A0E6C6 operate?
Mode-S A0E6C6 has broadcast 20 distinct callsigns, including UAL752, UAL661, UAL2848, UAL1852, UAL1304.