Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2BBCC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27526 · BOEING 737 MAX 9 · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A2BBCC
Octal
50535714
Decimal
10,664,908
Country
US
Tail
N27526
Type
B39M
No current signal · last broadcast Jul 26, 20:15 UTC
Flights observed
432
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:15 UTC

Last known position

Most recent position reported by Mode-S A2BBCC.

Country allocation

The ICAO 24-bit address A2BBCC 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
UAL2223 - 5 2026-07-03
UAL2025 United Airlines 5 2026-05-27
UAL1042 United Airlines 5 2026-04-19
UAL668 United Airlines 4 2026-06-10
UAL1922 - 4 2026-07-11
UAL1556 United Airlines 4 2026-06-10
UAL1471 - 4 2026-06-23
UAL1039 United Airlines 4 2026-06-08
UAL795 United Airlines 3 2026-05-11
UAL694 United Airlines 3 2026-05-29
UAL308 - 3 2026-07-15
UAL279 United Airlines 3 2026-07-22
UAL2622 - 3 2026-07-14
UAL2489 - 3 2026-06-22
UAL2418 United Airlines 3 2026-06-12
UAL1644 United Airlines 3 2026-05-20
UAL1472 - 3 2026-06-23
UAL1043 United Airlines 3 2026-04-19
UAL8182 - 2 2026-07-15
UAL8175 United Airlines 2 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1260 SNA → SFO Jul 26, 19:35 UTCJul 26, 20:15 UTC40m
2026-07-26 UAL2855 EWR → SFO Jul 26, 12:30 UTCJul 26, 17:20 UTC4h 50m
2026-07-26 UAL1730 IAD → SEA Jul 26, 06:25 UTCJul 26, 10:50 UTC4h 26m
2026-07-25 UAL1103 DEN → BOS Jul 25, 21:30 UTCJul 25, 21:50 UTC20m
2026-07-25 UAL1103 DEN → BOS Jul 25, 21:36 UTCJul 26, 02:10 UTC4h 34m
2026-07-25 UAL1798 IAH → PHX Jul 25, 14:10 UTCJul 25, 19:30 UTC5h 20m
2026-07-24 UAL2755 LAX → SFO Jul 24, 23:55 UTCJul 25, 02:40 UTC2h 45m
2026-07-24 UAL2086 EWR → ATL Jul 24, 19:10 UTCJul 24, 21:00 UTC1h 50m
2026-07-24 UAL2086 EWR → ATL Jul 24, 19:14 UTCJul 24, 22:11 UTC2h 57m
2026-07-24 UAL1734 SAN → SFO Jul 24, 12:45 UTCJul 24, 17:25 UTC4h 40m
2026-07-23 UAL1270 ORD → PUJ Jul 23, 14:05 UTCJul 23, 23:05 UTC9h 0m
2026-07-22 UAL403 LAX → ITO Jul 22, 20:45 UTCJul 22, 23:40 UTC2h 55m
2026-07-22 UAL279 CLT → EWR Jul 22, 16:35 UTCJul 22, 19:05 UTC2h 30m
2026-07-21 UAL1667 CUN → ORD Jul 21, 21:05 UTCJul 22, 00:45 UTC3h 40m
2026-07-21 UAL1659 JAX → EWR Jul 21, 16:10 UTCJul 21, 19:25 UTC3h 15m
2026-07-21 UAL490 - Jul 21, 11:20 UTCJul 21, 12:35 UTC1h 15m
2026-07-21 UAL457 BWI → SFO Jul 21, 03:45 UTCJul 21, 04:30 UTC45m
2026-07-20 UAL352 IAD → BOS Jul 20, 23:35 UTCJul 21, 01:35 UTC2h 0m
2026-07-20 UAL1520 MCO → DEN Jul 20, 17:10 UTCJul 20, 20:25 UTC3h 15m
2026-07-20 UAL2321 SFO → EWR Jul 20, 12:15 UTCJul 20, 15:30 UTC3h 15m
2026-07-20 UAL2433 BOS → DEN Jul 20, 00:50 UTCJul 20, 04:30 UTC3h 40m
2026-07-19 UAL2466 - Jul 19, 21:30 UTCJul 19, 23:20 UTC1h 50m
2026-07-19 UAL2825 ORD → PHL Jul 19, 16:50 UTCJul 19, 18:04 UTC1h 14m
2026-07-19 UAL2825 ORD → PHL Jul 19, 16:30 UTCJul 19, 18:25 UTC1h 55m
2026-07-19 UAL2034 - Jul 19, 13:00 UTCJul 19, 14:30 UTC1h 30m
2026-07-18 UAL1160 MBJ → ORD Jul 18, 15:20 UTCJul 19, 00:45 UTC9h 25m
2026-07-18 UAL2005 - Jul 18, 02:19 UTCJul 18, 04:20 UTC2h 1m
2026-07-17 UAL2672 - Jul 17, 20:25 UTCJul 17, 22:10 UTC1h 45m
2026-07-17 UAL2207 - Jul 17, 15:55 UTCJul 17, 17:40 UTC1h 45m
2026-07-17 UAL2038 ORD → PHL Jul 17, 13:20 UTCJul 17, 14:55 UTC1h 35m
2026-07-17 UAL661 EWR → ORD Jul 17, 02:05 UTCJul 17, 03:55 UTC1h 50m
2026-07-16 UAL2759 ORD → EWR Jul 16, 22:25 UTCJul 17, 00:20 UTC1h 55m
2026-07-16 UAL2759 ORD → EWR Jul 16, 22:04 UTCJul 17, 00:21 UTC2h 17m
2026-07-16 UAL1398 COS → ORD Jul 16, 18:25 UTCJul 16, 20:35 UTC2h 10m
2026-07-16 UAL1398 COS → ORD Jul 16, 18:28 UTCJul 16, 20:14 UTC1h 46m
2026-07-16 UAL1082 - Jul 16, 14:40 UTCJul 16, 16:35 UTC1h 55m
2026-07-16 UAL2805 STL → ORD Jul 16, 11:10 UTCJul 16, 11:54 UTC45m
2026-07-16 UAL2144 - Jul 16, 01:30 UTCJul 16, 02:20 UTC50m
2026-07-15 UAL308 PHL → ORD Jul 15, 21:20 UTCJul 15, 23:20 UTC2h 0m
2026-07-15 UAL8182 - Jul 15, 17:45 UTCJul 15, 19:25 UTC1h 40m
2026-07-15 UAL8182 ORD → PHL Jul 15, 17:29 UTCJul 15, 19:20 UTC1h 51m
2026-07-14 UAL651 - Jul 14, 23:40 UTCJul 15, 02:15 UTC2h 35m
2026-07-14 UAL2635 ORD → FLL Jul 14, 19:20 UTCJul 14, 22:00 UTC2h 40m
2026-07-14 UAL1215 SAV → ORD Jul 14, 15:35 UTCJul 14, 17:25 UTC1h 50m
2026-07-14 UAL2622 ORD → SAV Jul 14, 12:20 UTCJul 14, 14:15 UTC1h 55m
2026-07-14 UAL651 PPM → ORD Jul 14, 00:35 UTCJul 14, 03:10 UTC2h 35m
2026-07-13 UAL2635 ORD → FLL Jul 13, 20:40 UTCJul 13, 23:15 UTC2h 35m
2026-07-12 UAL545 - Jul 12, 22:05 UTCJul 12, 23:05 UTC1h 0m
2026-07-12 UAL545 CMH → ORD Jul 12, 22:07 UTCJul 12, 22:41 UTC34m
2026-07-12 UAL1069 ORD → CMH Jul 12, 19:51 UTCJul 12, 20:21 UTC30m

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 N27526 page for operator, model, and routing details .

Mode-S A2BBCC frequently asked

What is Mode-S code A2BBCC?
A2BBCC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27526.
Where is Mode-S A2BBCC registered?
Mode-S code A2BBCC 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 A2BBCC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2BBCC, octal 50535714, decimal 10,664,908.
What flights does A2BBCC operate?
Mode-S A2BBCC has broadcast 20 distinct callsigns, including UAL2223, UAL2025, UAL1042, UAL668, UAL1922.