Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3EEB0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N35204 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
A3EEB0
Octal
50767260
Decimal
10,743,472
Country
US
Tail
N35204
Type
B738
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
475
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S A3EEB0.

Country allocation

The ICAO 24-bit address A3EEB0 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
UAL1359 United Airlines 6 2026-07-20
UAL2768 - 5 2026-07-06
UAL2652 United Airlines 5 2026-06-14
UAL1049 United Airlines 5 2026-04-17
UAL514 United Airlines 4 2026-07-23
UAL476 United Airlines 4 2026-07-23
UAL456 - 4 2026-06-30
UAL2809 - 4 2026-07-05
UAL275 United Airlines 4 2026-05-25
UAL1919 - 4 2026-06-26
UAL1799 United Airlines 4 2026-07-21
UAL1601 United Airlines 4 2026-06-11
UAL1600 United Airlines 4 2026-06-11
UAL1491 United Airlines 4 2026-05-12
UAL669 - 3 2026-07-15
UAL631 - 3 2026-07-20
UAL596 United Airlines 3 2026-07-25
UAL488 United Airlines 3 2026-04-21
UAL467 - 3 2026-06-17
UAL2857 - 3 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2844 BWI → ORD Jul 26, 18:55 UTCJul 26, 21:00 UTC2h 5m
2026-07-26 UAL1862 ORD → PUJ Jul 26, 13:45 UTCJul 26, 17:10 UTC3h 25m
2026-07-26 UAL1862 ORD → PUJ Jul 26, 13:52 UTCJul 26, 16:52 UTC3h 0m
2026-07-26 UAL768 RDU → EWR Jul 26, 01:40 UTCJul 26, 05:15 UTC3h 35m
2026-07-25 UAL326 ORD → IAD Jul 25, 21:05 UTCJul 25, 23:45 UTC2h 40m
2026-07-25 UAL596 IAD → EWR Jul 25, 16:05 UTCJul 25, 19:35 UTC3h 30m
2026-07-25 UAL687 EWR → IAH Jul 25, 13:20 UTCJul 25, 14:05 UTC45m
2026-07-25 UAL687 EWR → IAH Jul 25, 13:17 UTCJul 25, 14:01 UTC44m
2026-07-25 UAL8153 MYR → EWR Jul 25, 01:25 UTCJul 25, 01:55 UTC30m
2026-07-24 UAL475 EWR → MCO Jul 24, 21:25 UTCJul 24, 23:40 UTC2h 15m
2026-07-24 UAL1029 LAX → DEN Jul 24, 17:40 UTCJul 24, 19:55 UTC2h 15m
2026-07-24 UAL2493 PDX → DEN Jul 24, 12:20 UTCJul 24, 15:45 UTC3h 25m
2026-07-24 UAL1534 EWR → FLL Jul 24, 00:30 UTCJul 24, 03:20 UTC2h 50m
2026-07-23 UAL514 AUS → EWR Jul 23, 20:30 UTCJul 23, 22:10 UTC1h 40m
2026-07-23 UAL514 AUS → EWR Jul 23, 20:26 UTCJul 23, 22:08 UTC1h 42m
2026-07-23 UAL476 SFO → ORD Jul 23, 17:30 UTCJul 23, 18:50 UTC1h 20m
2026-07-23 UAL476 SFO → ORD Jul 23, 17:37 UTCJul 23, 18:47 UTC1h 10m
2026-07-23 UAL2853 DEN → EWR Jul 23, 14:05 UTCJul 23, 15:50 UTC1h 45m
2026-07-23 UAL2853 DEN → EWR Jul 23, 14:05 UTCJul 23, 15:46 UTC1h 41m
2026-07-23 UAL2819 DEN → SAT Jul 23, 00:10 UTCJul 23, 01:50 UTC1h 40m
2026-07-22 UAL1953 YYC → DEN Jul 22, 19:41 UTCJul 22, 21:48 UTC2h 7m
2026-07-22 UAL1953 YYC → DEN Jul 22, 19:40 UTCJul 22, 21:50 UTC2h 10m
2026-07-22 UAL1832 CUN → IAH Jul 22, 13:20 UTCJul 22, 18:00 UTC4h 40m
2026-07-21 UAL2382 IAH → PHL Jul 21, 20:50 UTCJul 22, 01:30 UTC4h 40m
2026-07-21 UAL1799 MIA → EWR Jul 21, 16:20 UTCJul 21, 18:55 UTC2h 35m
2026-07-21 UAL434 EWR → IAH Jul 21, 11:05 UTCJul 21, 13:05 UTC2h 0m
2026-07-21 UAL434 EWR → IAH Jul 21, 11:00 UTCJul 21, 13:08 UTC2h 8m
2026-07-21 UAL1469 DFW → IAH Jul 21, 00:00 UTCJul 21, 02:05 UTC2h 5m
2026-07-20 UAL1360 IAD → RSW Jul 20, 20:00 UTCJul 20, 22:00 UTC2h 0m
2026-07-20 UAL1488 - Jul 20, 16:30 UTCJul 20, 18:25 UTC1h 55m
2026-07-20 UAL1488 CLE → MCO Jul 20, 16:30 UTCJul 20, 18:16 UTC1h 46m
2026-07-20 UAL544 LAX → SFO Jul 20, 12:50 UTCJul 20, 15:15 UTC2h 25m
2026-07-20 UAL631 - Jul 20, 07:20 UTCJul 20, 11:15 UTC3h 55m
2026-07-20 UAL1359 IAH → EWR Jul 20, 05:30 UTCJul 20, 05:35 UTC5m
2026-07-20 UAL1359 IAH → EWR Jul 20, 01:15 UTCJul 20, 05:35 UTC4h 20m
2026-07-20 UAL1359 IAH → EWR Jul 20, 01:23 UTCJul 20, 05:14 UTC3h 51m
2026-07-19 UAL2724 LAS → SFO Jul 19, 20:00 UTCJul 19, 22:15 UTC2h 15m
2026-07-19 UAL2724 LAS → SFO Jul 19, 15:10 UTCJul 19, 17:35 UTC2h 25m
2026-07-18 UAL2067 IAH → LGA Jul 18, 17:55 UTCJul 18, 20:20 UTC2h 25m
2026-07-18 UAL2067 IAH → LGA Jul 18, 17:53 UTCJul 18, 20:17 UTC2h 24m
2026-07-18 UAL715 - Jul 18, 13:20 UTCJul 18, 16:05 UTC2h 45m
2026-07-18 UAL8210 SFO → CLE Jul 18, 06:05 UTCJul 18, 10:20 UTC4h 15m
2026-07-18 UAL1267 LAS → SFO Jul 18, 03:35 UTCJul 18, 04:45 UTC1h 10m
2026-07-18 UAL2338 PSP → SFO Jul 18, 00:00 UTCJul 18, 01:25 UTC1h 25m
2026-07-17 UAL2155 - Jul 17, 21:00 UTCJul 17, 22:00 UTC1h 0m
2026-07-17 UAL2383 PHL → DEN Jul 17, 18:00 UTCJul 17, 18:55 UTC55m
2026-07-17 UAL2383 PHL → DEN Jul 17, 18:07 UTCJul 17, 19:11 UTC1h 4m
2026-07-17 UAL2853 - Jul 17, 14:00 UTCJul 17, 16:00 UTC2h 0m
2026-07-17 UAL2819 - Jul 17, 00:10 UTCJul 17, 02:15 UTC2h 5m
2026-07-16 UAL2350 - Jul 16, 20:29 UTCJul 16, 22:19 UTC1h 50m

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 N35204 page for operator, model, and routing details .

Mode-S A3EEB0 frequently asked

What is Mode-S code A3EEB0?
A3EEB0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N35204.
Where is Mode-S A3EEB0 registered?
Mode-S code A3EEB0 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 A3EEB0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3EEB0, octal 50767260, decimal 10,743,472.
What flights does A3EEB0 operate?
Mode-S A3EEB0 has broadcast 20 distinct callsigns, including UAL1359, UAL2768, UAL2652, UAL1049, UAL514.