Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2FBEC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N29124 · BOEING 757-200 · operated by UNITED AIRLINES INC

Hex
A2FBEC
Octal
50575754
Decimal
10,681,324
Country
US
Tail
N29124
Type
B752
Broadcasting now · callsign UAL118 · 29,900 ft
Flights observed
285
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:35 UTC

Current position

A2FBEC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A2FBEC 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
UAL979 United Airlines 8 2026-05-27
UAL2434 - 8 2026-07-07
UAL2115 - 8 2026-07-09
UAL1758 United Airlines 8 2026-07-26
UAL1343 - 8 2026-06-30
UAL310 United Airlines 6 2026-05-30
UAL2626 - 6 2026-06-30
UAL238 - 6 2026-07-16
UAL2301 United Airlines 6 2026-06-09
UAL1759 United Airlines 6 2026-07-24
UAL1700 - 6 2026-07-06
UAL978 United Airlines 5 2026-05-27
UAL419 - 5 2026-07-02
UAL311 United Airlines 5 2026-05-30
UAL2743 - 5 2026-06-20
UAL271 - 5 2026-07-13
UAL2641 United Airlines 5 2026-07-05
UAL2227 - 5 2026-06-29
UAL2127 - 5 2026-07-07
UAL145 - 5 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1758 DEN → KOA Jul 26, 18:25 UTCJul 26, 20:35 UTC2h 10m
2026-07-25 UAL663 DEN → ABQ Jul 25, 20:05 UTCJul 25, 23:40 UTC3h 35m
2026-07-25 UAL1403 JAX → EWR Jul 25, 13:15 UTCJul 25, 18:00 UTC4h 45m
2026-07-25 UAL712 ORD → DEL Jul 25, 00:20 UTCJul 25, 05:30 UTC5h 10m
2026-07-24 UAL1283 EWR → ATL Jul 24, 19:05 UTCJul 24, 22:05 UTC3h 0m
2026-07-24 UAL1759 LGA → IAH Jul 24, 09:35 UTCJul 24, 12:10 UTC2h 35m
2026-07-24 UAL1759 LGA → IAH Jul 24, 06:05 UTCJul 24, 06:20 UTC15m
2026-07-23 UAL1758 DEN → KOA Jul 23, 18:40 UTCJul 23, 20:45 UTC2h 5m
2026-07-23 UAL1758 DEN → KOA Jul 23, 18:38 UTCJul 24, 01:29 UTC6h 51m
2026-07-23 UAL1759 LGA → IAH Jul 23, 10:05 UTCJul 23, 12:10 UTC2h 5m
2026-07-23 UAL1759 LGA → IAH Jul 23, 06:00 UTCJul 23, 06:10 UTC10m
2026-07-23 UAL1758 DEN → KOA Jul 23, 01:20 UTCJul 23, 01:30 UTC10m
2026-07-22 UAL1758 DEN → KOA Jul 22, 18:30 UTCJul 22, 20:40 UTC2h 10m
2026-07-22 UAL2308 IAH → SJC Jul 22, 10:20 UTCJul 22, 12:00 UTC1h 40m
2026-07-21 UAL2307 DEN → LIH Jul 21, 18:20 UTCJul 22, 01:30 UTC7h 10m
2026-07-21 UAL1759 LGA → IAH Jul 21, 10:10 UTCJul 21, 12:25 UTC2h 15m
2026-07-21 UAL1759 LGA → IAH Jul 21, 06:10 UTCJul 21, 06:20 UTC10m
2026-07-21 UAL1758 DEN → KOA Jul 21, 02:10 UTCJul 21, 02:20 UTC10m
2026-07-20 UAL1758 DEN → KOA Jul 20, 19:25 UTCJul 20, 21:45 UTC2h 20m
2026-07-17 UAL663 DEN → ABQ Jul 17, 20:55 UTCJul 18, 00:19 UTC3h 25m
2026-07-17 UAL239 - Jul 17, 08:15 UTCJul 17, 15:20 UTC7h 5m
2026-07-16 UAL238 - Jul 16, 23:15 UTCJul 17, 05:25 UTC6h 10m
2026-07-16 UAL139 - Jul 16, 11:10 UTCJul 16, 16:30 UTC5h 20m
2026-07-16 UAL139 KEF → EWR Jul 16, 11:19 UTCJul 16, 16:33 UTC5h 14m
2026-07-16 UAL138 - Jul 16, 07:10 UTCJul 16, 07:25 UTC15m
2026-07-16 UAL138 - Jul 16, 02:40 UTCJul 16, 04:10 UTC1h 30m
2026-07-15 UAL274 SFO → EWR Jul 15, 19:00 UTCJul 16, 00:15 UTC5h 15m
2026-07-15 UAL1095 IAD → SFO Jul 15, 10:50 UTCJul 15, 15:45 UTC4h 55m
2026-07-14 UAL399 - Jul 14, 11:40 UTCJul 14, 17:30 UTC5h 50m
2026-07-14 UAL138 EWR → KEF Jul 14, 01:45 UTCJul 14, 06:28 UTC4h 43m
2026-07-14 UAL138 - Jul 14, 01:30 UTCJul 14, 06:35 UTC5h 5m
2026-07-13 UAL271 - Jul 13, 13:35 UTCJul 13, 19:55 UTC6h 20m
2026-07-13 UAL270 - Jul 13, 06:05 UTCJul 13, 11:50 UTC5h 45m
2026-07-12 UAL2248 SFO → EWR Jul 12, 22:35 UTCJul 13, 03:40 UTC5h 5m
2026-07-12 UAL648 EWR → SFO Jul 12, 15:01 UTCJul 12, 20:05 UTC5h 5m
2026-07-11 UAL239 OPO → EWR Jul 11, 08:20 UTCJul 11, 15:35 UTC7h 15m
2026-07-10 UAL238 EWR → OPO Jul 10, 23:18 UTCJul 11, 05:49 UTC6h 31m
2026-07-10 UAL238 - Jul 10, 23:35 UTCJul 11, 05:55 UTC6h 20m
2026-07-10 UAL316 DUB → EWR Jul 10, 13:10 UTCJul 10, 20:15 UTC7h 5m
2026-07-10 UAL317 EWR → DUB Jul 10, 03:55 UTCJul 10, 09:55 UTC6h 0m
2026-07-10 UAL317 EWR → DUB Jul 10, 03:58 UTCJul 10, 09:45 UTC5h 47m
2026-07-09 UAL274 OAK → EWR Jul 9, 21:55 UTCJul 10, 02:20 UTC4h 25m
2026-07-09 UAL2115 - Jul 9, 10:15 UTCJul 9, 16:00 UTC5h 45m
2026-07-07 UAL2127 - Jul 7, 17:35 UTCJul 7, 22:30 UTC4h 55m
2026-07-07 UAL2434 EWR → LAX Jul 7, 10:10 UTCJul 7, 15:10 UTC5h 0m
2026-07-07 UAL2434 EWR → LAX Jul 7, 10:19 UTCJul 7, 15:02 UTC4h 43m
2026-07-06 UAL2248 - Jul 6, 22:35 UTCJul 7, 03:40 UTC5h 5m
2026-07-06 UAL648 - Jul 6, 15:15 UTCJul 6, 21:05 UTC5h 50m
2026-07-06 UAL1700 - Jul 6, 01:10 UTCJul 6, 06:20 UTC5h 10m
2026-07-05 UAL2641 SFO → SAN Jul 5, 01:05 UTCJul 5, 06:45 UTC5h 40m

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 N29124 page for operator, model, and routing details .

Mode-S A2FBEC frequently asked

What is Mode-S code A2FBEC?
A2FBEC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N29124.
Where is Mode-S A2FBEC registered?
Mode-S code A2FBEC 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 A2FBEC broadcasting right now?
Yes. Mode-S A2FBEC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2FBEC, octal 50575754, decimal 10,681,324.
What flights does A2FBEC operate?
Mode-S A2FBEC has broadcast 20 distinct callsigns, including UAL979, UAL2434, UAL2115, UAL1758, UAL1343.