Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2B12D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27260 · BOEING 737 MAX 8 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A2B12D
Octal
50530455
Decimal
10,662,189
Country
US
Tail
N27260
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
402
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A2B12D.

Country allocation

The ICAO 24-bit address A2B12D 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
UAL1272 - 5 2026-06-24
UAL1271 - 5 2026-06-24
UAL608 United Airlines 4 2026-05-23
UAL417 United Airlines 4 2026-05-16
UAL359 United Airlines 4 2026-05-12
UAL2664 - 4 2026-06-21
UAL2312 - 4 2026-06-27
UAL2057 United Airlines 4 2026-05-07
UAL2036 - 4 2026-07-11
UAL1749 - 4 2026-06-26
UAL1008 United Airlines 4 2026-06-11
UAL840 United Airlines 3 2026-05-21
UAL540 - 3 2026-06-24
UAL477 United Airlines 3 2026-05-22
UAL474 United Airlines 3 2026-05-12
UAL418 United Airlines 3 2026-05-17
UAL2859 - 3 2026-07-12
UAL267 United Airlines 3 2026-05-26
UAL2446 United Airlines 3 2026-04-14
UAL2313 United Airlines 3 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL1541 AUS → DEN Jul 14, 18:10 UTCJul 14, 20:00 UTC1h 50m
2026-07-14 UAL456 DEN → AUS Jul 14, 14:10 UTCJul 14, 15:50 UTC1h 40m
2026-07-14 UAL2041 MSP → DEN Jul 14, 10:45 UTCJul 14, 12:15 UTC1h 30m
2026-07-14 UAL2076 DEN → MSP Jul 14, 01:05 UTCJul 14, 02:35 UTC1h 30m
2026-07-13 UAL296 - Jul 13, 21:30 UTCJul 13, 23:10 UTC1h 40m
2026-07-13 UAL296 PVR → DEN Jul 13, 20:09 UTCJul 13, 23:04 UTC2h 55m
2026-07-13 UAL2257 DEN → PVR Jul 13, 15:56 UTCJul 13, 18:17 UTC2h 21m
2026-07-13 UAL2257 - Jul 13, 15:40 UTCJul 13, 16:50 UTC1h 10m
2026-07-13 UAL687 - Jul 13, 13:35 UTCJul 13, 14:15 UTC40m
2026-07-13 UAL8190 - Jul 13, 02:15 UTCJul 13, 02:50 UTC35m
2026-07-12 UAL400 - Jul 12, 21:05 UTCJul 13, 00:10 UTC3h 5m
2026-07-12 UAL2030 DEN → RIC Jul 12, 16:11 UTCJul 12, 19:38 UTC3h 27m
2026-07-12 UAL2030 - Jul 12, 16:15 UTCJul 12, 19:35 UTC3h 20m
2026-07-12 UAL1584 SNA → SFO Jul 12, 14:25 UTCJul 12, 14:45 UTC20m
2026-07-12 UAL1584 SNA → SFO Jul 12, 13:22 UTCJul 12, 14:45 UTC1h 23m
2026-07-12 UAL2859 - Jul 12, 01:50 UTCJul 12, 02:05 UTC15m
2026-07-11 UAL1698 EWR → DEN Jul 11, 12:35 UTCJul 11, 22:55 UTC10h 20m
2026-07-11 UAL2036 - Jul 11, 01:55 UTCJul 11, 02:55 UTC1h 0m
2026-07-10 UAL2036 - Jul 10, 23:25 UTCJul 10, 23:40 UTC15m
2026-07-10 UAL1339 - Jul 10, 21:25 UTCJul 10, 21:45 UTC20m
2026-07-10 UAL1339 - Jul 10, 16:15 UTCJul 10, 19:45 UTC3h 30m
2026-07-10 UAL1584 SNA → SFO Jul 10, 13:35 UTCJul 10, 14:00 UTC25m
2026-07-10 UAL2859 - Jul 10, 02:05 UTCJul 10, 02:20 UTC15m
2026-07-10 UAL2859 DEN → EGE Jul 10, 02:05 UTCJul 10, 02:27 UTC22m
2026-07-09 UAL1368 - Jul 9, 20:45 UTCJul 10, 00:20 UTC3h 35m
2026-07-09 UAL1368 - Jul 9, 18:30 UTCJul 9, 18:40 UTC10m
2026-07-09 UAL1368 SJU → DEN Jul 9, 18:28 UTCJul 10, 00:11 UTC5h 43m
2026-07-09 UAL2021 - Jul 9, 16:50 UTCJul 9, 17:15 UTC25m
2026-07-09 UAL2021 IAD → SJU Jul 9, 12:52 UTCJul 9, 17:11 UTC4h 19m
2026-07-09 UAL2021 - Jul 9, 13:05 UTCJul 9, 15:05 UTC2h 0m
2026-07-09 UAL572 ANC → IAD Jul 9, 05:03 UTCJul 9, 11:33 UTC6h 30m
2026-07-09 UAL572 ANC → IAD Jul 9, 04:55 UTCJul 9, 11:35 UTC6h 40m
2026-07-08 UAL280 DEN → ANC Jul 8, 17:40 UTCJul 8, 22:45 UTC5h 5m
2026-07-08 UAL690 - Jul 8, 13:05 UTCJul 8, 15:45 UTC2h 40m
2026-07-07 UAL2476 SAN → DEN Jul 7, 20:30 UTCJul 7, 22:55 UTC2h 25m
2026-07-07 UAL2285 SMF → DEN Jul 7, 15:55 UTCJul 7, 17:50 UTC1h 55m
2026-07-07 UAL1302 - Jul 7, 07:40 UTCJul 7, 08:05 UTC25m
2026-07-07 UAL2799 - Jul 7, 01:55 UTCJul 7, 05:55 UTC4h 0m
2026-07-06 UAL1902 - Jul 6, 18:50 UTCJul 6, 22:45 UTC3h 55m
2026-07-06 UAL1257 DEN → LGA Jul 6, 12:10 UTCJul 6, 17:25 UTC5h 15m
2026-07-05 UAL2213 LAX → EWR Jul 5, 21:33 UTCJul 5, 23:47 UTC2h 14m
2026-07-05 UAL2213 LAX → EWR Jul 5, 21:30 UTCJul 5, 23:50 UTC2h 20m
2026-07-05 UAL1518 ORF → EWR Jul 5, 18:55 UTCJul 5, 20:00 UTC1h 5m
2026-07-05 UAL1518 ORF → EWR Jul 5, 18:37 UTCJul 5, 19:51 UTC1h 14m
2026-07-04 UAL1699 DEN → ORF Jul 4, 16:10 UTCJul 5, 03:00 UTC10h 50m
2026-07-04 UAL2614 ANC → DEN Jul 4, 07:25 UTCJul 4, 12:00 UTC4h 35m
2026-07-03 UAL2073 IAD → ANC Jul 3, 22:25 UTCJul 4, 05:20 UTC6h 55m
2026-07-03 UAL2463 SEA → IAD Jul 3, 15:35 UTCJul 3, 20:10 UTC4h 35m
2026-07-03 UAL2820 - Jul 3, 02:05 UTCJul 3, 06:05 UTC4h 0m
2026-07-02 UAL1182 - Jul 2, 23:10 UTCJul 2, 23:30 UTC20m

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 N27260 page for operator, model, and routing details .

Mode-S A2B12D frequently asked

What is Mode-S code A2B12D?
A2B12D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27260.
Where is Mode-S A2B12D registered?
Mode-S code A2B12D 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 A2B12D broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2B12D, octal 50530455, decimal 10,662,189.
What flights does A2B12D operate?
Mode-S A2B12D has broadcast 20 distinct callsigns, including UAL1272, UAL1271, UAL608, UAL417, UAL359.