Apparatus

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sensors Mode-S transponder

A12750

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17341 · operated by UNITED AIRLINES INC

Hex
A12750
Octal
50223520
Decimal
10,561,360
Country
US
Tail
N17341
Type
B38M
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
466
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S A12750.

Country allocation

The ICAO 24-bit address A12750 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
UAL841 United Airlines 6 2026-07-20
UAL267 United Airlines 6 2026-06-05
UAL2392 - 6 2026-06-30
UAL1985 - 5 2026-06-30
UAL1717 United Airlines 5 2026-05-12
UAL1551 - 5 2026-06-22
UAL258 - 4 2026-06-22
UAL2228 - 4 2026-07-12
UAL2092 - 4 2026-06-28
UAL1901 - 4 2026-07-10
UAL1880 United Airlines 4 2026-05-25
UAL1769 United Airlines 4 2026-04-15
UAL1596 - 4 2026-07-12
UAL1594 - 4 2026-07-20
UAL1063 United Airlines 4 2026-04-16
UAL834 - 3 2026-07-20
UAL649 United Airlines 3 2026-04-18
UAL643 - 3 2026-06-15
UAL608 United Airlines 3 2026-06-03
UAL508 United Airlines 3 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1223 SXM → IAD Jul 26, 20:15 UTCJul 26, 20:40 UTC25m
2026-07-26 UAL1629 EWR → SXM Jul 26, 14:45 UTCJul 26, 18:00 UTC3h 15m
2026-07-26 UAL2455 EWR → ATL Jul 26, 10:10 UTCJul 26, 12:35 UTC2h 25m
2026-07-26 UAL1845 BWI → LAX Jul 26, 00:40 UTCJul 26, 03:05 UTC2h 25m
2026-07-25 UAL1538 TPA → SFO Jul 25, 13:25 UTCJul 25, 23:10 UTC9h 45m
2026-07-25 UAL467 BOS → DEN Jul 25, 07:45 UTCJul 25, 12:05 UTC4h 20m
2026-07-25 UAL467 BOS → DEN Jul 25, 07:25 UTCJul 25, 12:05 UTC4h 40m
2026-07-25 UAL406 DEN → LGA Jul 25, 04:35 UTCJul 25, 05:45 UTC1h 10m
2026-07-25 UAL8111 ATL → YYZ Jul 25, 01:45 UTCJul 25, 02:45 UTC1h 0m
2026-07-25 UAL8111 ATL → YYZ Jul 25, 01:33 UTCJul 25, 02:42 UTC1h 9m
2026-07-24 UAL1350 PBI → EWR Jul 24, 18:45 UTCJul 24, 23:50 UTC5h 5m
2026-07-24 UAL674 RDU → EWR Jul 24, 15:35 UTCJul 24, 17:05 UTC1h 30m
2026-07-24 UAL674 RDU → EWR Jul 24, 15:26 UTCJul 24, 16:57 UTC1h 31m
2026-07-24 UAL1108 EWR → TPA Jul 24, 12:45 UTCJul 24, 14:05 UTC1h 20m
2026-07-24 UAL1789 DEN → SJC Jul 24, 10:10 UTCJul 24, 10:45 UTC35m
2026-07-24 UAL2382 IAH → PHL Jul 24, 03:00 UTCJul 24, 03:35 UTC35m
2026-07-24 UAL2382 IAH → PHL Jul 24, 02:50 UTCJul 24, 02:55 UTC5m
2026-07-23 UAL2677 CLE → DEN Jul 23, 23:57 UTCJul 24, 00:32 UTC35m
2026-07-23 UAL2677 CLE → DEN Jul 23, 23:50 UTCJul 24, 00:40 UTC50m
2026-07-23 UAL348 OGG → ORD Jul 23, 18:05 UTCJul 23, 21:25 UTC3h 20m
2026-07-23 UAL297 SFO → SAN Jul 23, 12:00 UTCJul 23, 16:00 UTC4h 0m
2026-07-23 UAL559 EWR → CLE Jul 23, 04:38 UTCJul 23, 09:37 UTC4h 59m
2026-07-23 UAL559 EWR → CLE Jul 23, 04:25 UTCJul 23, 05:35 UTC1h 10m
2026-07-22 UAL205 AUS → EWR Jul 22, 19:40 UTCJul 22, 23:55 UTC4h 15m
2026-07-22 UAL1089 MEX → IAH Jul 22, 15:55 UTCJul 22, 17:40 UTC1h 45m
2026-07-22 UAL1024 IAH → MEX Jul 22, 12:30 UTCJul 22, 14:15 UTC1h 45m
2026-07-22 UAL2674 BNA → EWR Jul 22, 00:25 UTCJul 22, 03:45 UTC3h 20m
2026-07-21 UAL2133 EWR → RSW Jul 21, 14:35 UTCJul 21, 17:55 UTC3h 20m
2026-07-21 UAL1552 ANC → IAH Jul 21, 06:40 UTCJul 21, 13:10 UTC6h 30m
2026-07-20 UAL841 NRT → GUM Jul 20, 22:15 UTCJul 21, 04:30 UTC6h 14m
2026-07-20 UAL1382 PHX → EWR Jul 20, 18:25 UTCJul 20, 19:40 UTC1h 15m
2026-07-20 UAL1355 - Jul 20, 16:15 UTCJul 20, 17:05 UTC50m
2026-07-20 UAL834 ANC → ORD Jul 20, 08:10 UTCJul 20, 14:00 UTC5h 50m
2026-07-20 UAL1594 - Jul 20, 03:00 UTCJul 20, 07:00 UTC4h 0m
2026-07-20 UAL1594 SFO → ANC Jul 20, 03:00 UTCJul 20, 06:52 UTC3h 52m
2026-07-19 UAL1230 YVR → SFO Jul 19, 23:40 UTCJul 20, 01:35 UTC1h 55m
2026-07-19 UAL1134 EWR → CUN Jul 19, 16:35 UTCJul 19, 22:10 UTC5h 35m
2026-07-19 UAL2415 SNA → IAH Jul 19, 13:35 UTCJul 19, 14:30 UTC55m
2026-07-18 UAL2616 - Jul 18, 17:00 UTCJul 18, 18:25 UTC1h 25m
2026-07-18 UAL1061 - Jul 18, 14:20 UTCJul 18, 14:45 UTC25m
2026-07-18 UAL1061 - Jul 18, 13:10 UTCJul 18, 14:15 UTC1h 5m
2026-07-18 UAL1627 - Jul 18, 01:50 UTCJul 18, 04:25 UTC2h 36m
2026-07-17 UAL1903 - Jul 17, 20:40 UTCJul 17, 21:20 UTC40m
2026-07-17 UAL1903 GUA → IAH Jul 17, 18:48 UTCJul 17, 21:17 UTC2h 29m
2026-07-17 UAL1903 - Jul 17, 18:50 UTCJul 17, 19:00 UTC10m
2026-07-17 UAL1751 IAH → GUA Jul 17, 16:59 UTCJul 17, 17:15 UTC15m
2026-07-17 UAL1751 IAH → GUA Jul 17, 14:55 UTCJul 17, 15:29 UTC35m
2026-07-17 UAL1751 IAH → GUA Jul 17, 14:50 UTCJul 17, 17:14 UTC2h 24m
2026-07-17 UAL1552 - Jul 17, 06:35 UTCJul 17, 13:05 UTC6h 30m
2026-07-16 UAL841 - Jul 16, 22:25 UTCJul 17, 04:35 UTC6h 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 N17341 page for operator, model, and routing details .

Mode-S A12750 frequently asked

What is Mode-S code A12750?
A12750 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17341.
Where is Mode-S A12750 registered?
Mode-S code A12750 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 A12750 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12750, octal 50223520, decimal 10,561,360.
What flights does A12750 operate?
Mode-S A12750 has broadcast 20 distinct callsigns, including UAL841, UAL267, UAL2392, UAL1985, UAL1717.