Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A12B07

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17441 · BOEING 737 MAX 9 · operated by UNITED AIRLINES INC

Hex
A12B07
Octal
50225407
Decimal
10,562,311
Country
US
Tail
N17441
Type
B39M
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
492
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S A12B07.

Country allocation

The ICAO 24-bit address A12B07 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
UAL2862 United Airlines 8 2026-07-26
UAL731 United Airlines 7 2026-07-23
UAL1321 United Airlines 7 2026-07-23
UAL700 United Airlines 5 2026-06-23
UAL2390 - 5 2026-07-17
UAL2021 United Airlines 5 2026-04-27
UAL1368 United Airlines 5 2026-04-27
UAL1367 United Airlines 5 2026-06-02
UAL1251 - 5 2026-07-17
UAL641 - 4 2026-07-12
UAL533 United Airlines 4 2026-04-15
UAL2740 United Airlines 4 2026-06-04
UAL2084 United Airlines 4 2026-07-26
UAL2076 - 4 2026-06-28
UAL1724 United Airlines 4 2026-07-02
UAL1718 United Airlines 4 2026-05-05
UAL1509 United Airlines 4 2026-05-05
UAL1039 United Airlines 4 2026-05-20
UAL701 - 3 2026-07-06
UAL574 - 3 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2862 SFO → DEN Jul 26, 19:00 UTCJul 26, 21:45 UTC2h 45m
2026-07-26 UAL2826 GUM → SFO Jul 26, 15:50 UTCJul 26, 17:15 UTC1h 25m
2026-07-26 UAL2084 ORD → SFO Jul 26, 12:55 UTCJul 26, 14:20 UTC1h 25m
2026-07-26 UAL2084 ORD → SFO Jul 26, 12:50 UTCJul 26, 14:19 UTC1h 29m
2026-07-26 UAL1784 STT → EWR Jul 26, 02:25 UTCJul 26, 03:05 UTC40m
2026-07-25 UAL1892 DEN → BOS Jul 25, 21:45 UTCJul 25, 22:50 UTC1h 5m
2026-07-25 UAL1892 DEN → BOS Jul 25, 20:00 UTCJul 25, 22:52 UTC2h 52m
2026-07-25 UAL486 CLE → DEN Jul 25, 15:50 UTCJul 25, 17:40 UTC1h 50m
2026-07-25 UAL2636 - Jul 25, 12:10 UTCJul 25, 14:05 UTC1h 55m
2026-07-25 UAL2131 PBI → EWR Jul 25, 02:35 UTCJul 25, 03:25 UTC50m
2026-07-24 UAL1458 LGA → IAH Jul 24, 20:00 UTCJul 24, 23:40 UTC3h 40m
2026-07-24 UAL1194 IAD → SAL Jul 24, 13:08 UTCJul 24, 16:56 UTC3h 48m
2026-07-24 UAL1194 - Jul 24, 13:15 UTCJul 24, 16:45 UTC3h 30m
2026-07-24 UAL8133 SFO → DEN Jul 24, 00:15 UTCJul 24, 04:40 UTC4h 25m
2026-07-23 UAL1321 MIA → EWR Jul 23, 21:20 UTCJul 23, 22:15 UTC55m
2026-07-23 UAL1321 MIA → EWR Jul 23, 17:45 UTCJul 23, 17:55 UTC10m
2026-07-23 UAL731 TPA → SFO Jul 23, 07:20 UTCJul 23, 07:50 UTC30m
2026-07-23 UAL731 TPA → SFO Jul 23, 02:30 UTCJul 23, 03:10 UTC40m
2026-07-22 UAL2862 SFO → DEN Jul 22, 19:40 UTCJul 23, 00:50 UTC5h 10m
2026-07-22 UAL2862 SFO → DEN Jul 22, 19:15 UTCJul 23, 00:49 UTC5h 34m
2026-07-22 UAL2125 BNA → IAD Jul 22, 14:55 UTCJul 22, 15:45 UTC50m
2026-07-22 UAL2125 BNA → IAD Jul 22, 14:48 UTCJul 22, 16:09 UTC1h 21m
2026-07-21 UAL2414 IAH → SFO Jul 21, 16:55 UTCJul 21, 17:50 UTC55m
2026-07-21 UAL752 - Jul 21, 11:20 UTCJul 21, 14:05 UTC2h 45m
2026-07-21 UAL2294 - Jul 21, 00:25 UTCJul 21, 02:55 UTC2h 30m
2026-07-20 UAL1710 JAX → ORD Jul 20, 18:05 UTCJul 20, 22:05 UTC4h 0m
2026-07-20 UAL2428 - Jul 20, 12:20 UTCJul 20, 15:50 UTC3h 30m
2026-07-20 UAL1503 ORD → BOS Jul 20, 00:40 UTCJul 20, 03:45 UTC3h 5m
2026-07-19 UAL1660 ANC → EWR Jul 19, 18:45 UTCJul 19, 22:50 UTC4h 5m
2026-07-19 UAL1349 - Jul 19, 14:30 UTCJul 19, 16:45 UTC2h 15m
2026-07-19 UAL2210 SAN → IAH Jul 19, 07:50 UTCJul 19, 12:50 UTC5h 0m
2026-07-19 UAL1706 ITO → LAX Jul 19, 04:50 UTCJul 19, 05:25 UTC35m
2026-07-19 UAL1706 ITO → LAX Jul 19, 00:45 UTCJul 19, 00:55 UTC10m
2026-07-19 UAL1706 ITO → LAX Jul 19, 00:41 UTCJul 19, 05:21 UTC4h 40m
2026-07-18 UAL1705 - Jul 18, 18:15 UTCJul 18, 18:45 UTC30m
2026-07-18 UAL1705 ORD → EWR Jul 18, 18:08 UTCJul 18, 23:35 UTC5h 27m
2026-07-18 UAL446 LAS → LAX Jul 18, 15:50 UTCJul 18, 16:30 UTC40m
2026-07-18 UAL2315 BOS → ORD Jul 18, 06:30 UTCJul 18, 07:15 UTC45m
2026-07-18 UAL2372 LGA → IAH Jul 18, 03:10 UTCJul 18, 03:55 UTC45m
2026-07-17 UAL2372 LGA → IAH Jul 17, 23:10 UTCJul 17, 23:20 UTC10m
2026-07-17 UAL8113 - Jul 17, 21:25 UTCJul 17, 21:34 UTC10m
2026-07-17 UAL8113 - Jul 17, 16:29 UTCJul 17, 16:59 UTC30m
2026-07-17 UAL1251 - Jul 17, 13:15 UTCJul 17, 14:04 UTC50m
2026-07-17 UAL1251 - Jul 17, 09:04 UTCJul 17, 09:25 UTC20m
2026-07-17 UAL1251 HNL → LAX Jul 17, 09:09 UTCJul 17, 13:58 UTC4h 49m
2026-07-17 UAL2390 - Jul 17, 07:05 UTCJul 17, 07:20 UTC15m
2026-07-17 UAL2390 - Jul 17, 01:59 UTCJul 17, 03:05 UTC1h 5m
2026-07-16 UAL1195 - Jul 16, 22:05 UTCJul 16, 23:59 UTC1h 55m
2026-07-16 UAL1715 - Jul 16, 18:29 UTCJul 16, 20:25 UTC1h 55m
2026-07-16 UAL1826 EWR → SAN Jul 16, 10:50 UTCJul 16, 15:45 UTC4h 55m

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 N17441 page for operator, model, and routing details .

Mode-S A12B07 frequently asked

What is Mode-S code A12B07?
A12B07 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17441.
Where is Mode-S A12B07 registered?
Mode-S code A12B07 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 A12B07 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12B07, octal 50225407, decimal 10,562,311.
What flights does A12B07 operate?
Mode-S A12B07 has broadcast 20 distinct callsigns, including UAL2862, UAL731, UAL1321, UAL700, UAL2390.