Apparatus

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sensors Mode-S transponder

A12798

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17363 · BOEING 737 MAX 8 · operated by UNITED AIRLINES INC

Hex
A12798
Octal
50223630
Decimal
10,561,432
Country
US
Tail
N17363
Type
B38M
No current signal · last broadcast Jul 26, 18:55 UTC
Flights observed
460
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:55 UTC

Last known position

Most recent position reported by Mode-S A12798.

Country allocation

The ICAO 24-bit address A12798 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
UAL2036 - 8 2026-07-09
UAL1603 - 6 2026-07-01
UAL1299 - 6 2026-06-25
UAL2432 United Airlines 5 2026-04-21
UAL2085 United Airlines 5 2026-04-21
UAL1567 United Airlines 5 2026-07-26
UAL598 United Airlines 4 2026-05-19
UAL574 - 4 2026-06-23
UAL2316 United Airlines 4 2026-04-22
UAL1994 United Airlines 4 2026-04-13
UAL1870 United Airlines 4 2026-07-24
UAL1678 - 4 2026-06-30
UAL1339 - 4 2026-07-08
UAL584 United Airlines 3 2026-06-07
UAL571 United Airlines 3 2026-06-24
UAL494 - 3 2026-07-08
UAL368 - 3 2026-06-30
UAL2852 United Airlines 3 2026-05-13
UAL280 - 3 2026-07-02
UAL2623 - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1567 MEX → IAD Jul 26, 15:00 UTCJul 26, 18:55 UTC3h 55m
2026-07-26 UAL1567 MEX → IAD Jul 26, 15:09 UTCJul 26, 18:53 UTC3h 44m
2026-07-25 UAL1566 IAD → MEX Jul 25, 22:00 UTCJul 26, 02:05 UTC4h 5m
2026-07-25 UAL1567 MEX → IAD Jul 25, 15:10 UTCJul 25, 19:05 UTC3h 55m
2026-07-25 UAL783 LAX → IAD Jul 25, 00:00 UTCJul 25, 03:15 UTC3h 15m
2026-07-25 UAL783 LAX → IAD Jul 25, 00:05 UTCJul 25, 03:05 UTC3h 0m
2026-07-24 UAL1870 IAH → SFO Jul 24, 21:40 UTCJul 24, 22:10 UTC30m
2026-07-24 UAL1870 IAH → SFO Jul 24, 21:39 UTCJul 24, 22:11 UTC32m
2026-07-24 UAL1045 DEN → IAD Jul 24, 19:40 UTCJul 24, 19:55 UTC15m
2026-07-24 UAL2285 ORD → EWR Jul 24, 16:00 UTCJul 24, 17:55 UTC1h 55m
2026-07-24 UAL1302 EWR → BOS Jul 24, 06:45 UTCJul 24, 07:05 UTC20m
2026-07-23 UAL2111 EWR → BNA Jul 23, 23:40 UTCJul 24, 04:00 UTC4h 20m
2026-07-23 UAL1384 DEN → TPA Jul 23, 16:30 UTCJul 23, 21:35 UTC5h 5m
2026-07-23 UAL488 BUR → SFO Jul 23, 14:30 UTCJul 23, 15:20 UTC50m
2026-07-23 UAL488 BUR → SFO Jul 23, 14:16 UTCJul 23, 15:18 UTC1h 2m
2026-07-23 UAL1367 BOS → IAH Jul 23, 05:40 UTCJul 23, 06:30 UTC50m
2026-07-23 UAL2657 IAD → EWR Jul 23, 03:45 UTCJul 23, 04:45 UTC1h 0m
2026-07-23 UAL2657 IAD → EWR Jul 23, 00:15 UTCJul 23, 02:20 UTC2h 5m
2026-07-22 UAL2663 PSP → SFO Jul 22, 19:40 UTCJul 22, 20:05 UTC25m
2026-07-22 UAL1378 JAC → DEN Jul 22, 17:45 UTCJul 22, 18:00 UTC15m
2026-07-22 UAL2167 TPA → DEN Jul 22, 12:05 UTCJul 22, 15:20 UTC3h 15m
2026-07-21 UAL2375 PHL → ORD Jul 21, 20:15 UTCJul 21, 23:20 UTC3h 5m
2026-07-21 UAL2285 ORD → EWR Jul 21, 16:05 UTCJul 21, 18:00 UTC1h 55m
2026-07-21 UAL2285 ORD → EWR Jul 21, 16:02 UTCJul 21, 18:00 UTC1h 58m
2026-07-21 UAL1302 EWR → BOS Jul 21, 07:10 UTCJul 21, 07:35 UTC25m
2026-07-21 UAL1083 EWR → JAX Jul 21, 02:40 UTCJul 21, 04:40 UTC2h 0m
2026-07-20 UAL1086 BOS → IAH Jul 20, 22:45 UTCJul 21, 01:15 UTC2h 29m
2026-07-20 UAL2200 LGA → DEN Jul 20, 17:05 UTCJul 20, 20:40 UTC3h 35m
2026-07-20 UAL1697 ATL → EWR Jul 20, 12:20 UTCJul 20, 15:20 UTC3h 0m
2026-07-20 UAL1697 ATL → EWR Jul 20, 12:19 UTCJul 20, 15:25 UTC3h 6m
2026-07-20 UAL3930 ZRH → IAD Jul 20, 05:32 UTCJul 20, 08:12 UTC2h 40m
2026-07-20 UAL3930 ZRH → IAD Jul 20, 05:25 UTCJul 20, 08:15 UTC2h 50m
2026-07-19 UAL1560 SJO → EWR Jul 19, 20:20 UTCJul 20, 00:55 UTC4h 35m
2026-07-19 UAL1080 EWR → SJO Jul 19, 14:15 UTCJul 19, 18:45 UTC4h 30m
2026-07-18 UAL1969 EWR → IAH Jul 18, 11:20 UTCJul 18, 13:35 UTC2h 15m
2026-07-18 UAL1399 - Jul 18, 02:25 UTCJul 18, 04:55 UTC2h 31m
2026-07-17 UAL2359 PDX → EWR Jul 17, 17:40 UTCJul 17, 22:25 UTC4h 45m
2026-07-17 UAL1613 EWR → FLL Jul 17, 10:50 UTCJul 17, 16:00 UTC5h 10m
2026-07-16 UAL2003 BZN → EWR Jul 16, 19:22 UTCJul 16, 22:58 UTC3h 36m
2026-07-16 UAL2003 - Jul 16, 19:35 UTCJul 16, 22:59 UTC3h 25m
2026-07-16 UAL1538 - Jul 16, 13:30 UTCJul 16, 16:30 UTC3h 0m
2026-07-16 UAL1681 LAS → EWR Jul 16, 05:50 UTCJul 16, 10:20 UTC4h 30m
2026-07-15 UAL1149 - Jul 15, 22:25 UTCJul 16, 03:05 UTC4h 40m
2026-07-15 UAL1456 - Jul 15, 13:50 UTCJul 15, 19:55 UTC6h 5m
2026-07-15 UAL559 - Jul 15, 07:05 UTCJul 15, 09:35 UTC2h 30m
2026-07-14 UAL205 - Jul 14, 23:50 UTCJul 15, 00:10 UTC20m
2026-07-14 UAL205 - Jul 14, 19:45 UTCJul 14, 22:45 UTC2h 59m
2026-07-14 UAL8110 AUS → IAH Jul 14, 16:19 UTCJul 14, 17:23 UTC1h 4m
2026-07-14 UAL8110 - Jul 14, 16:30 UTCJul 14, 17:25 UTC55m
2026-07-14 UAL1942 DEN → AUS Jul 14, 01:00 UTCJul 14, 02:40 UTC1h 40m

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 N17363 page for operator, model, and routing details .

Mode-S A12798 frequently asked

What is Mode-S code A12798?
A12798 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17363.
Where is Mode-S A12798 registered?
Mode-S code A12798 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 A12798 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12798, octal 50223630, decimal 10,561,432.
What flights does A12798 operate?
Mode-S A12798 has broadcast 20 distinct callsigns, including UAL2036, UAL1603, UAL1299, UAL2432, UAL2085.