Apparatus

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sensors Mode-S transponder

A126EC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17316 · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
A126EC
Octal
50223354
Decimal
10,561,260
Country
US
Tail
N17316
Type
B38M
Broadcasting now · callsign UAL183 · 2,875 ft
Flights observed
200
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 08:45 UTC

Current position

A126EC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A126EC 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
UAL849 United Airlines 14 2026-07-23
UAL848 United Airlines 14 2026-07-23
UAL183 United Airlines 14 2026-07-24
UAL184 - 11 2026-07-22
UAL197 United Airlines 7 2026-07-26
UAL155 - 7 2026-07-09
UAL837 United Airlines 6 2026-06-11
UAL827 - 6 2026-06-23
UAL196 United Airlines 6 2026-07-26
UAL151 United Airlines 6 2026-07-22
UAL873 - 5 2026-06-22
UAL838 United Airlines 5 2026-06-12
UAL793 United Airlines 5 2026-04-17
UAL193 United Airlines 5 2026-07-17
UAL154 - 5 2026-07-09
UAL1517 United Airlines 5 2026-04-18
UAL150 United Airlines 5 2026-07-23
UAL33 - 4 2026-07-14
UAL307 United Airlines 4 2026-04-17
UAL192 United Airlines 4 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL197 NRT → GUM Jul 26, 08:10 UTCJul 26, 08:45 UTC35m
2026-07-26 UAL196 GUM → NRT Jul 26, 05:00 UTCJul 26, 05:50 UTC50m
2026-07-24 UAL192 ROR → GUM Jul 24, 18:20 UTCJul 24, 18:35 UTC15m
2026-07-24 UAL192 ROR → GUM Jul 24, 14:45 UTCJul 24, 17:00 UTC2h 15m
2026-07-24 UAL183 GUM → MNL Jul 24, 09:29 UTCJul 24, 12:41 UTC3h 12m
2026-07-23 UAL848 HND → GUM Jul 23, 14:55 UTCJul 23, 15:30 UTC35m
2026-07-23 UAL849 GUM → HND Jul 23, 09:44 UTCJul 23, 13:10 UTC3h 26m
2026-07-23 UAL150 KIX → GUM Jul 23, 02:15 UTCJul 23, 02:35 UTC20m
2026-07-22 UAL151 GUM → KIX Jul 22, 21:28 UTCJul 23, 00:41 UTC3h 13m
2026-07-22 UAL184 MNL → GUM Jul 22, 14:50 UTCJul 22, 17:56 UTC3h 6m
2026-07-22 UAL184 - Jul 22, 14:50 UTCJul 22, 15:15 UTC25m
2026-07-22 UAL183 GUM → MNL Jul 22, 09:29 UTCJul 22, 12:49 UTC3h 20m
2026-07-22 UAL183 GUM → MNL Jul 22, 03:35 UTCJul 22, 12:45 UTC9h 10m
2026-07-22 UAL165 GUM → FUK Jul 22, 01:25 UTCJul 22, 01:35 UTC10m
2026-07-19 UAL848 HND → GUM Jul 19, 15:00 UTCJul 19, 17:50 UTC2h 50m
2026-07-19 UAL848 HND → GUM Jul 19, 14:45 UTCJul 19, 15:30 UTC45m
2026-07-19 UAL849 GUM → HND Jul 19, 12:15 UTCJul 19, 13:10 UTC55m
2026-07-18 UAL132 MAJ → PNI Jul 18, 18:35 UTCJul 18, 18:45 UTC10m
2026-07-18 UAL133 MAJ → HNL Jul 18, 14:20 UTCJul 18, 14:40 UTC20m
2026-07-17 UAL184 - Jul 17, 16:59 UTCJul 17, 17:30 UTC30m
2026-07-17 UAL184 MNL → GUM Jul 17, 16:55 UTCJul 17, 20:08 UTC3h 13m
2026-07-17 UAL193 ROR → MNL Jul 17, 13:10 UTCJul 17, 15:29 UTC2h 20m
2026-07-17 UAL193 ROR → MNL Jul 17, 12:53 UTCJul 17, 15:34 UTC2h 41m
2026-07-17 UAL193 ROR → MNL Jul 17, 11:25 UTCJul 17, 11:45 UTC20m
2026-07-16 UAL184 - Jul 16, 14:55 UTCJul 16, 15:30 UTC35m
2026-07-16 UAL183 - Jul 16, 12:34 UTCJul 16, 13:10 UTC35m
2026-07-15 UAL183 - Jul 15, 17:40 UTCJul 16, 13:10 UTC19h 30m
2026-07-15 UAL133 - Jul 15, 12:20 UTCJul 15, 12:35 UTC15m
2026-07-14 UAL197 NRT → GUM Jul 14, 08:27 UTCJul 14, 11:29 UTC3h 2m
2026-07-14 UAL197 - Jul 14, 08:10 UTCJul 14, 08:45 UTC35m
2026-07-14 UAL33 - Jul 14, 05:10 UTCJul 14, 06:05 UTC55m
2026-07-13 UAL33 - Jul 13, 09:25 UTCJul 14, 06:05 UTC20h 40m
2026-07-13 UAL196 - Jul 13, 05:10 UTCJul 13, 06:20 UTC1h 10m
2026-07-11 UAL184 - Jul 11, 14:55 UTCJul 11, 15:20 UTC25m
2026-07-11 UAL183 - Jul 11, 12:00 UTCJul 11, 12:45 UTC45m
2026-07-09 UAL154 - Jul 9, 18:00 UTCJul 9, 18:10 UTC10m
2026-07-09 UAL155 - Jul 9, 13:20 UTCJul 9, 13:40 UTC20m
2026-07-08 UAL3884 - Jul 8, 15:20 UTCJul 8, 17:55 UTC2h 35m
2026-07-07 UAL183 - Jul 7, 16:30 UTCJul 7, 16:55 UTC25m
2026-07-07 UAL183 - Jul 7, 11:00 UTCJul 7, 13:30 UTC2h 30m
2026-07-07 UAL150 - Jul 7, 03:45 UTCJul 7, 04:00 UTC15m
2026-07-04 UAL151 GUM → KIX Jul 4, 21:28 UTCJul 5, 01:34 UTC4h 6m
2026-06-28 UAL150 KIX → GUM Jun 28, 02:10 UTCJun 28, 02:29 UTC20m
2026-06-28 UAL151 GUM → KIX Jun 28, 00:15 UTCJun 28, 00:30 UTC15m
2026-06-26 UAL184 - Jun 26, 16:54 UTCJun 26, 17:00 UTC5m
2026-06-26 UAL184 MNL → GUM Jun 26, 16:55 UTCJun 26, 20:10 UTC3h 15m
2026-06-26 UAL193 - Jun 26, 14:55 UTCJun 26, 15:39 UTC45m
2026-06-26 UAL193 - Jun 26, 11:14 UTCJun 26, 11:40 UTC25m
2026-06-25 UAL158 - Jun 25, 17:39 UTCJun 25, 18:04 UTC25m
2026-06-25 UAL158 ROR → GUM Jun 25, 17:13 UTCJun 25, 19:21 UTC2h 8m

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 N17316 page for operator, model, and routing details .

Mode-S A126EC frequently asked

What is Mode-S code A126EC?
A126EC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17316.
Where is Mode-S A126EC registered?
Mode-S code A126EC 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 A126EC broadcasting right now?
Yes. Mode-S A126EC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A126EC, octal 50223354, decimal 10,561,260.
What flights does A126EC operate?
Mode-S A126EC has broadcast 20 distinct callsigns, including UAL849, UAL848, UAL183, UAL184, UAL197.