Apparatus

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sensors Mode-S transponder

A1244D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17296 · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
A1244D
Octal
50222115
Decimal
10,560,589
Country
US
Tail
N17296
Type
B38M
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
480
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A1244D.

Country allocation

The ICAO 24-bit address A1244D 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
UAL1751 United Airlines 7 2026-05-27
UAL231 United Airlines 6 2026-07-21
UAL1445 United Airlines 6 2026-05-09
UAL1903 United Airlines 5 2026-05-25
UAL1789 - 5 2026-07-14
UAL1675 United Airlines 5 2026-05-22
UAL1214 - 5 2026-07-16
UAL1124 - 5 2026-07-03
UAL709 United Airlines 4 2026-04-17
UAL438 United Airlines 4 2026-05-24
UAL2656 United Airlines 4 2026-07-23
UAL2601 United Airlines 4 2026-06-11
UAL2250 - 4 2026-06-23
UAL2231 - 4 2026-07-17
UAL221 - 4 2026-07-13
UAL2021 United Airlines 4 2026-06-07
UAL1784 - 4 2026-07-12
UAL1676 United Airlines 4 2026-05-23
UAL1538 United Airlines 4 2026-05-13
UAL1523 United Airlines 4 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1493 IAH → DEN Jul 26, 20:25 UTCJul 26, 21:15 UTC50m
2026-07-26 UAL2314 IAD → DFW Jul 26, 14:10 UTCJul 26, 16:10 UTC2h 0m
2026-07-25 UAL1956 JAX → EWR Jul 25, 23:45 UTCJul 26, 01:55 UTC2h 10m
2026-07-25 UAL1455 EWR → MIA Jul 25, 19:20 UTCJul 25, 21:30 UTC2h 10m
2026-07-25 UAL1455 EWR → MIA Jul 25, 19:10 UTCJul 25, 21:30 UTC2h 20m
2026-07-25 UAL1454 IAH → NAS Jul 25, 15:20 UTCJul 25, 17:35 UTC2h 15m
2026-07-25 UAL2302 EWR → MSY Jul 25, 10:30 UTCJul 25, 13:05 UTC2h 35m
2026-07-25 UAL2302 EWR → MSY Jul 25, 10:33 UTCJul 25, 13:07 UTC2h 34m
2026-07-24 UAL2439 TPA → ORD Jul 24, 23:50 UTCJul 25, 02:30 UTC2h 40m
2026-07-24 UAL2208 FLL → EWR Jul 24, 18:10 UTCJul 24, 21:15 UTC3h 5m
2026-07-24 UAL2208 FLL → EWR Jul 24, 17:59 UTCJul 24, 22:08 UTC4h 9m
2026-07-24 UAL1443 IAD → STT Jul 24, 12:55 UTCJul 24, 16:40 UTC3h 45m
2026-07-23 UAL2388 LAS → EWR Jul 23, 22:05 UTCJul 24, 00:45 UTC2h 40m
2026-07-23 UAL2388 LAS → EWR Jul 23, 21:56 UTCJul 24, 00:40 UTC2h 44m
2026-07-23 UAL382 IAH → SAT Jul 23, 17:10 UTCJul 23, 19:50 UTC2h 40m
2026-07-23 UAL382 IAH → SAT Jul 23, 17:15 UTCJul 23, 19:52 UTC2h 37m
2026-07-23 UAL2047 - Jul 23, 13:00 UTCJul 23, 15:40 UTC2h 40m
2026-07-23 UAL469 IAH → ORD Jul 23, 10:40 UTCJul 23, 11:20 UTC40m
2026-07-23 UAL395 EWR → SFO Jul 23, 06:50 UTCJul 23, 08:30 UTC1h 40m
2026-07-23 UAL2656 SNA → DEN Jul 23, 03:10 UTCJul 23, 05:05 UTC1h 55m
2026-07-22 UAL1350 PBI → EWR Jul 22, 18:50 UTCJul 23, 00:10 UTC5h 20m
2026-07-22 UAL1219 DFW → EWR Jul 22, 12:35 UTCJul 22, 15:35 UTC3h 0m
2026-07-22 UAL2856 EWR → JAX Jul 22, 03:55 UTCJul 22, 05:25 UTC1h 30m
2026-07-21 UAL231 LAX → LHR Jul 21, 23:46 UTCJul 22, 00:35 UTC49m
2026-07-21 UAL231 LAX → LHR Jul 21, 23:35 UTCJul 22, 00:30 UTC55m
2026-07-21 UAL231 LAX → LHR Jul 21, 20:35 UTCJul 21, 20:45 UTC10m
2026-07-21 UAL231 LAX → LHR Jul 21, 13:15 UTCJul 21, 20:19 UTC7h 4m
2026-07-21 UAL231 LAX → LHR Jul 21, 13:15 UTCJul 21, 20:52 UTC7h 37m
2026-07-21 UAL231 LAX → LHR Jul 21, 13:10 UTCJul 21, 13:15 UTC5m
2026-07-21 UAL230 BON → EWR Jul 21, 02:40 UTCJul 21, 04:20 UTC1h 40m
2026-07-21 UAL230 BON → EWR Jul 21, 02:37 UTCJul 21, 08:41 UTC6h 4m
2026-07-20 UAL2252 MEX → EWR Jul 20, 19:05 UTCJul 20, 23:35 UTC4h 30m
2026-07-20 UAL1063 EWR → MEX Jul 20, 12:35 UTCJul 20, 17:00 UTC4h 25m
2026-07-19 UAL1386 LAS → EWR Jul 19, 23:40 UTCJul 20, 04:05 UTC4h 25m
2026-07-19 UAL1386 LAS → EWR Jul 19, 23:41 UTCJul 20, 04:09 UTC4h 28m
2026-07-19 UAL1864 EWR → LAS Jul 19, 17:20 UTCJul 19, 21:50 UTC4h 30m
2026-07-19 UAL3032 IAD → EWR Jul 19, 15:05 UTCJul 19, 15:50 UTC45m
2026-07-19 UAL3032 IAD → EWR Jul 19, 14:50 UTCJul 19, 15:55 UTC1h 5m
2026-07-19 UAL572 ANC → IAD Jul 19, 06:40 UTCJul 19, 12:55 UTC6h 15m
2026-07-19 UAL1592 DEN → BOS Jul 19, 00:00 UTCJul 19, 05:10 UTC5h 10m
2026-07-18 UAL361 AUS → DEN Jul 18, 21:00 UTCJul 18, 22:40 UTC1h 40m
2026-07-18 UAL2621 - Jul 18, 01:50 UTCJul 18, 02:14 UTC25m
2026-07-17 UAL2230 - Jul 17, 21:39 UTCJul 17, 23:50 UTC2h 10m
2026-07-17 UAL2230 NAS → IAH Jul 17, 21:26 UTCJul 17, 23:53 UTC2h 27m
2026-07-17 UAL2231 - Jul 17, 17:15 UTCJul 17, 19:40 UTC2h 25m
2026-07-17 UAL2231 IAH → NAS Jul 17, 17:12 UTCJul 17, 19:44 UTC2h 32m
2026-07-17 UAL226 - Jul 17, 11:35 UTCJul 17, 14:55 UTC3h 20m
2026-07-17 UAL2656 DEN → BOS Jul 17, 06:25 UTCJul 17, 09:50 UTC3h 25m
2026-07-17 UAL1959 ANC → DEN Jul 17, 00:04 UTCJul 17, 04:59 UTC4h 55m
2026-07-16 UAL280 DEN → ANC Jul 16, 17:45 UTCJul 16, 22:59 UTC5h 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 N17296 page for operator, model, and routing details .

Mode-S A1244D frequently asked

What is Mode-S code A1244D?
A1244D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17296.
Where is Mode-S A1244D registered?
Mode-S code A1244D 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 A1244D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1244D, octal 50222115, decimal 10,560,589.
What flights does A1244D operate?
Mode-S A1244D has broadcast 20 distinct callsigns, including UAL1751, UAL231, UAL1445, UAL1903, UAL1789.