Apparatus

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sensors Mode-S transponder

A41632

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N36207 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
A41632
Octal
51013062
Decimal
10,753,586
Country
US
Tail
N36207
Type
B738
Broadcasting now · callsign UAL497 · 27,000 ft
Flights observed
437
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 17:35 UTC

Current position

A41632 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A41632 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
UAL2422 United Airlines 8 2026-07-22
UAL1765 - 6 2026-04-17
UAL590 United Airlines 5 2026-04-20
UAL673 United Airlines 4 2026-04-17
UAL637 United Airlines 4 2026-05-18
UAL622 United Airlines 4 2026-06-03
UAL2333 United Airlines 4 2026-05-16
UAL2167 - 4 2026-06-17
UAL1332 United Airlines 4 2026-06-02
UAL717 - 3 2026-07-14
UAL671 - 3 2026-06-16
UAL596 United Airlines 3 2026-06-06
UAL551 - 3 2026-07-06
UAL480 - 3 2026-07-17
UAL464 - 3 2026-07-10
UAL2849 - 3 2026-07-07
UAL2660 - 3 2026-07-16
UAL2133 United Airlines 3 2026-04-15
UAL2064 United Airlines 3 2026-05-19
UAL1793 United Airlines 3 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 UAL3855 - Jul 25, 02:55 UTCJul 25, 17:35 UTC14h 40m
2026-07-25 UAL2323 ORD → MCO Jul 25, 01:00 UTCJul 25, 01:35 UTC35m
2026-07-24 UAL1022 DEN → SAT Jul 24, 22:30 UTCJul 25, 00:10 UTC1h 40m
2026-07-24 UAL1315 EWR → FLL Jul 24, 17:00 UTCJul 24, 18:25 UTC1h 25m
2026-07-24 UAL1264 - Jul 24, 12:40 UTCJul 24, 15:10 UTC2h 30m
2026-07-24 UAL2840 GUM → SFO Jul 24, 08:10 UTCJul 24, 10:45 UTC2h 35m
2026-07-24 UAL751 EWR → SFO Jul 24, 01:35 UTCJul 24, 02:45 UTC1h 10m
2026-07-23 UAL2478 SAN → ORD Jul 23, 23:15 UTCJul 24, 00:20 UTC1h 5m
2026-07-23 UAL2449 SJC → IAH Jul 23, 19:25 UTCJul 23, 20:35 UTC1h 10m
2026-07-23 UAL2449 SJC → IAH Jul 23, 16:15 UTCJul 23, 18:00 UTC1h 45m
2026-07-23 UAL233 DEN → SFO Jul 23, 04:53 UTCJul 23, 06:29 UTC1h 36m
2026-07-23 UAL233 DEN → SFO Jul 23, 05:00 UTCJul 23, 06:30 UTC1h 30m
2026-07-22 UAL1174 SJD → SFO Jul 22, 18:35 UTCJul 23, 01:10 UTC6h 35m
2026-07-22 UAL565 YYZ → SFO Jul 22, 11:10 UTCJul 22, 16:00 UTC4h 50m
2026-07-22 UAL1649 SFO → CMH Jul 22, 03:30 UTCJul 22, 04:30 UTC1h 0m
2026-07-22 UAL2422 NAS → ORD Jul 22, 01:00 UTCJul 22, 01:10 UTC10m
2026-07-21 UAL2422 NAS → ORD Jul 21, 21:50 UTCJul 22, 01:10 UTC3h 20m
2026-07-21 UAL2422 NAS → ORD Jul 21, 21:34 UTCJul 22, 00:43 UTC3h 9m
2026-07-21 UAL2401 ORD → NAS Jul 21, 15:55 UTCJul 21, 18:15 UTC2h 20m
2026-07-21 UAL2653 RSW → EWR Jul 21, 12:25 UTCJul 21, 13:50 UTC1h 25m
2026-07-21 UAL2653 RSW → EWR Jul 21, 12:27 UTCJul 21, 13:49 UTC1h 22m
2026-07-21 UAL1658 IAD → BDL Jul 21, 03:15 UTCJul 21, 04:35 UTC1h 20m
2026-07-20 UAL2048 ORD → MSY Jul 20, 21:05 UTCJul 21, 00:35 UTC3h 29m
2026-07-20 UAL245 BZN → EWR Jul 20, 15:00 UTCJul 20, 18:55 UTC3h 55m
2026-07-20 UAL532 DEN → ORD Jul 20, 11:15 UTCJul 20, 12:45 UTC1h 30m
2026-07-19 UAL2050 - Jul 19, 23:35 UTCJul 20, 01:10 UTC1h 35m
2026-07-19 UAL1854 - Jul 19, 14:55 UTCJul 19, 21:15 UTC6h 20m
2026-07-19 UAL434 - Jul 19, 11:25 UTCJul 19, 13:20 UTC1h 55m
2026-07-19 UAL1469 DFW → IAH Jul 19, 03:10 UTCJul 19, 05:10 UTC2h 0m
2026-07-19 UAL1696 - Jul 19, 00:05 UTCJul 19, 02:05 UTC2h 0m
2026-07-19 UAL1696 FLL → IAH Jul 19, 00:09 UTCJul 19, 02:01 UTC1h 52m
2026-07-18 UAL2188 DEN → FLL Jul 18, 19:25 UTCJul 18, 22:55 UTC3h 30m
2026-07-18 UAL2750 - Jul 18, 13:55 UTCJul 18, 17:35 UTC3h 40m
2026-07-18 UAL1662 DEN → ALB Jul 18, 00:10 UTCJul 18, 03:20 UTC3h 11m
2026-07-17 UAL1389 - Jul 17, 19:55 UTCJul 17, 22:20 UTC2h 25m
2026-07-17 UAL480 DEN → CMH Jul 17, 15:55 UTCJul 17, 18:19 UTC2h 25m
2026-07-17 UAL2865 - Jul 17, 12:10 UTCJul 17, 14:04 UTC1h 55m
2026-07-17 UAL2479 DEN → SBA Jul 17, 02:05 UTCJul 17, 04:04 UTC2h 0m
2026-07-16 UAL2660 SAV → DEN Jul 16, 21:00 UTCJul 16, 23:49 UTC2h 50m
2026-07-16 UAL2660 SAV → DEN Jul 16, 20:57 UTCJul 16, 23:47 UTC2h 50m
2026-07-16 UAL1049 DEN → SAV Jul 16, 16:05 UTCJul 16, 18:55 UTC2h 50m
2026-07-16 UAL2865 SBA → DEN Jul 16, 12:09 UTCJul 16, 14:05 UTC1h 55m
2026-07-16 UAL2479 DEN → SBA Jul 16, 02:20 UTCJul 16, 04:20 UTC2h 0m
2026-07-15 UAL235 ATL → DEN Jul 15, 20:50 UTCJul 15, 23:25 UTC2h 35m
2026-07-15 UAL2424 DEN → ATL Jul 15, 16:50 UTCJul 15, 19:35 UTC2h 45m
2026-07-15 UAL690 - Jul 15, 13:05 UTCJul 15, 15:35 UTC2h 30m
2026-07-14 UAL717 SFO → CLE Jul 14, 17:36 UTCJul 14, 21:41 UTC4h 5m
2026-07-14 UAL717 SFO → CLE Jul 14, 17:30 UTCJul 14, 21:45 UTC4h 15m
2026-07-14 UAL2153 CLE → SFO Jul 14, 11:05 UTCJul 14, 15:50 UTC4h 45m
2026-07-12 UAL717 - Jul 12, 17:55 UTCJul 12, 22:10 UTC4h 15m

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 N36207 page for operator, model, and routing details .

Mode-S A41632 frequently asked

What is Mode-S code A41632?
A41632 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N36207.
Where is Mode-S A41632 registered?
Mode-S code A41632 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 A41632 broadcasting right now?
Yes. Mode-S A41632 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A41632, octal 51013062, decimal 10,753,586.
What flights does A41632 operate?
Mode-S A41632 has broadcast 20 distinct callsigns, including UAL2422, UAL1765, UAL590, UAL673, UAL637.