Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2B136

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N27269 · BOEING 737 MAX 8 · operated by UNITED AIRLINES INC

Hex
A2B136
Octal
50530466
Decimal
10,662,198
Country
US
Tail
N27269
Type
B38M
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
454
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S A2B136.

Country allocation

The ICAO 24-bit address A2B136 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
UAL205 - 8 2026-06-18
UAL508 United Airlines 6 2026-06-15
UAL2389 - 6 2026-06-22
UAL559 - 5 2026-06-19
UAL504 United Airlines 5 2026-04-30
UAL2192 United Airlines 5 2026-05-15
UAL1603 - 5 2026-06-29
UAL674 - 4 2026-07-08
UAL571 United Airlines 4 2026-07-20
UAL359 - 4 2026-06-23
UAL1901 - 4 2026-07-17
UAL1137 - 4 2026-07-17
UAL1108 - 4 2026-07-08
UAL834 United Airlines 3 2026-07-26
UAL783 United Airlines 3 2026-04-17
UAL700 United Airlines 3 2026-05-23
UAL643 United Airlines 3 2026-05-24
UAL593 United Airlines 3 2026-07-25
UAL564 United Airlines 3 2026-07-21
UAL560 United Airlines 3 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2415 SNA → IAH Jul 26, 19:35 UTCJul 26, 20:45 UTC1h 10m
2026-07-26 UAL2616 ATL → EWR Jul 26, 16:15 UTCJul 26, 17:45 UTC1h 30m
2026-07-26 UAL834 SFO → PIT Jul 26, 08:10 UTCJul 26, 13:40 UTC5h 30m
2026-07-25 UAL2073 DEN → SFO Jul 25, 22:07 UTCJul 26, 05:05 UTC6h 58m
2026-07-25 UAL2073 DEN → SFO Jul 25, 22:10 UTCJul 26, 05:10 UTC7h 0m
2026-07-25 UAL593 EWR → BOS Jul 25, 01:35 UTCJul 25, 19:50 UTC18h 15m
2026-07-24 UAL593 EWR → BOS Jul 24, 23:35 UTCJul 25, 19:50 UTC20h 15m
2026-07-24 UAL593 EWR → BOS Jul 24, 23:15 UTCJul 25, 19:50 UTC20h 35m
2026-07-24 UAL1455 EWR → MIA Jul 24, 19:25 UTCJul 24, 21:40 UTC2h 15m
2026-07-24 UAL1454 IAH → NAS Jul 24, 15:20 UTCJul 24, 17:30 UTC2h 10m
2026-07-23 UAL2674 BNA → EWR Jul 23, 21:15 UTCJul 24, 00:40 UTC3h 25m
2026-07-23 UAL2133 EWR → RSW Jul 23, 13:25 UTCJul 23, 16:30 UTC3h 5m
2026-07-22 UAL2162 ORD → PHL Jul 22, 17:50 UTCJul 22, 20:00 UTC2h 10m
2026-07-22 UAL2162 ORD → PHL Jul 22, 17:27 UTCJul 22, 19:59 UTC2h 32m
2026-07-22 UAL1956 JAX → EWR Jul 22, 03:20 UTCJul 22, 05:25 UTC2h 5m
2026-07-21 UAL2208 - Jul 21, 18:10 UTCJul 21, 22:45 UTC4h 35m
2026-07-21 UAL1443 IAD → STT Jul 21, 12:33 UTCJul 21, 15:55 UTC3h 22m
2026-07-21 UAL1443 IAD → STT Jul 21, 12:25 UTCJul 21, 16:05 UTC3h 40m
2026-07-21 UAL564 BOS → ORD Jul 21, 06:05 UTCJul 21, 10:00 UTC3h 55m
2026-07-21 UAL2429 BDL → ORD Jul 21, 02:30 UTCJul 21, 04:15 UTC1h 45m
2026-07-20 UAL2823 IAD → EWR Jul 20, 23:50 UTCJul 21, 00:55 UTC1h 5m
2026-07-20 UAL571 AUS → SFO Jul 20, 19:35 UTCJul 20, 20:40 UTC1h 5m
2026-07-20 UAL369 DCA → SFO Jul 20, 13:10 UTCJul 20, 18:00 UTC4h 50m
2026-07-19 UAL2386 EWR → TPA Jul 19, 21:50 UTCJul 20, 02:25 UTC4h 35m
2026-07-19 UAL267 BOS → DEN Jul 19, 13:45 UTCJul 19, 18:55 UTC5h 10m
2026-07-19 UAL2854 EWR → BZN Jul 19, 06:50 UTCJul 19, 11:45 UTC4h 55m
2026-07-19 UAL628 - Jul 19, 04:00 UTCJul 19, 05:00 UTC1h 0m
2026-07-19 UAL628 OGG → SFO Jul 19, 00:34 UTCJul 19, 04:55 UTC4h 21m
2026-07-18 UAL573 DEN → SFO Jul 18, 18:30 UTCJul 18, 19:05 UTC35m
2026-07-18 UAL1372 LAX → SFO Jul 18, 15:55 UTCJul 18, 16:50 UTC55m
2026-07-18 UAL2220 - Jul 18, 12:05 UTCJul 18, 12:50 UTC45m
2026-07-18 UAL2220 OGG → LAX Jul 18, 08:10 UTCJul 18, 12:46 UTC4h 36m
2026-07-18 UAL2221 - Jul 18, 00:25 UTCJul 18, 01:00 UTC35m
2026-07-18 UAL2221 LAX → OGG Jul 18, 00:21 UTCJul 18, 05:44 UTC5h 23m
2026-07-17 UAL2184 - Jul 17, 21:55 UTCJul 17, 22:40 UTC45m
2026-07-17 UAL1524 - Jul 17, 17:30 UTCJul 17, 20:10 UTC2h 40m
2026-07-17 UAL1901 - Jul 17, 14:15 UTCJul 17, 14:50 UTC35m
2026-07-17 UAL1901 - Jul 17, 12:30 UTCJul 17, 12:40 UTC10m
2026-07-17 UAL1137 - Jul 17, 06:25 UTCJul 17, 09:15 UTC2h 50m
2026-07-17 UAL1137 LAX → GUA Jul 17, 06:11 UTCJul 17, 10:48 UTC4h 37m
2026-07-16 UAL1296 - Jul 16, 23:20 UTCJul 17, 04:14 UTC4h 55m
2026-07-16 UAL1295 - Jul 16, 16:09 UTCJul 16, 21:19 UTC5h 10m
2026-07-16 UAL1612 - Jul 16, 08:25 UTCJul 16, 13:15 UTC4h 50m
2026-07-16 UAL1104 - Jul 16, 00:35 UTCJul 16, 05:45 UTC5h 10m
2026-07-16 UAL1104 LAX → LIH Jul 16, 00:31 UTCJul 16, 05:55 UTC5h 24m
2026-07-15 UAL2146 - Jul 15, 19:30 UTCJul 15, 22:00 UTC2h 30m
2026-07-15 UAL1914 IAD → YVR Jul 15, 12:40 UTCJul 15, 17:30 UTC4h 50m
2026-07-15 UAL641 ATL → IAD Jul 15, 09:55 UTCJul 15, 11:25 UTC1h 30m
2026-07-14 UAL2081 IAD → ATL Jul 14, 21:35 UTCJul 14, 23:00 UTC1h 24m
2026-07-14 UAL1567 MEX → IAD Jul 14, 14:55 UTCJul 14, 19:05 UTC4h 10m

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 N27269 page for operator, model, and routing details .

Mode-S A2B136 frequently asked

What is Mode-S code A2B136?
A2B136 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N27269.
Where is Mode-S A2B136 registered?
Mode-S code A2B136 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 A2B136 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2B136, octal 50530466, decimal 10,662,198.
What flights does A2B136 operate?
Mode-S A2B136 has broadcast 20 distinct callsigns, including UAL205, UAL508, UAL2389, UAL559, UAL504.