Apparatus

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sensors Mode-S transponder

A1270B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N17322 · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE

Hex
A1270B
Octal
50223413
Decimal
10,561,291
Country
US
Tail
N17322
Type
B38M
No current signal · last broadcast Jul 26, 11:20 UTC
Flights observed
280
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 11:20 UTC

Last known position

Most recent position reported by Mode-S A1270B.

Country allocation

The ICAO 24-bit address A1270B 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
UAL6 United Airlines 17 2026-07-20
UAL7 United Airlines 11 2026-07-26
UAL197 United Airlines 8 2026-07-21
UAL196 - 7 2026-07-18
UAL143 - 7 2026-07-18
UAL142 - 7 2026-07-19
UAL33 United Airlines 6 2026-07-21
UAL849 - 5 2026-07-10
UAL848 - 5 2026-06-27
UAL2866 United Airlines 4 2026-04-24
UAL2425 United Airlines 4 2026-05-10
UAL150 United Airlines 4 2026-07-24
UAL133 United Airlines 4 2026-07-22
UAL757 United Airlines 3 2026-05-19
UAL649 United Airlines 3 2026-04-21
UAL436 United Airlines 3 2026-04-15
UAL3901 United Airlines 3 2026-06-17
UAL32 - 3 2026-07-06
UAL2492 - 3 2026-04-13
UAL2433 United Airlines 3 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL7 IAH → NRT Jul 26, 08:15 UTCJul 26, 08:45 UTC30m
2026-07-26 UAL7 IAH → NRT Jul 26, 08:02 UTCJul 26, 12:31 UTC4h 29m
2026-07-26 UAL838 NRT → SFO Jul 26, 02:08 UTCJul 26, 05:20 UTC3h 12m
2026-07-26 UAL838 NRT → SFO Jul 26, 02:00 UTCJul 26, 05:30 UTC3h 30m
2026-07-25 UAL837 SFO → NRT Jul 25, 09:20 UTCJul 25, 10:40 UTC1h 20m
2026-07-25 UAL837 SFO → NRT Jul 25, 09:22 UTCJul 25, 12:33 UTC3h 11m
2026-07-25 UAL864 GUM → NRT Jul 25, 03:12 UTCJul 25, 06:21 UTC3h 9m
2026-07-24 UAL864 GUM → NRT Jul 24, 16:15 UTCJul 25, 06:25 UTC14h 10m
2026-07-24 UAL193 ROR → MNL Jul 24, 12:10 UTCJul 24, 14:30 UTC2h 20m
2026-07-24 UAL193 ROR → MNL Jul 24, 12:08 UTCJul 24, 14:24 UTC2h 16m
2026-07-24 UAL193 ROR → MNL Jul 24, 10:45 UTCJul 24, 11:00 UTC15m
2026-07-24 UAL150 KIX → GUM Jul 24, 02:25 UTCJul 24, 05:30 UTC3h 5m
2026-07-24 UAL150 KIX → GUM Jul 24, 02:15 UTCJul 24, 02:35 UTC20m
2026-07-24 UAL151 GUM → KIX Jul 24, 00:25 UTCJul 24, 00:35 UTC10m
2026-07-22 UAL132 MAJ → PNI Jul 22, 18:25 UTCJul 22, 18:35 UTC10m
2026-07-22 UAL133 MAJ → HNL Jul 22, 13:05 UTCJul 22, 13:30 UTC25m
2026-07-22 UAL133 MAJ → HNL Jul 22, 08:27 UTCJul 22, 13:27 UTC5h 0m
2026-07-21 UAL197 NRT → GUM Jul 21, 08:20 UTCJul 21, 08:55 UTC35m
2026-07-21 UAL33 NRT → LAX Jul 21, 04:55 UTCJul 21, 05:40 UTC45m
2026-07-20 UAL33 NRT → LAX Jul 20, 09:15 UTCJul 21, 05:40 UTC20h 24m
2026-07-20 UAL6 NRT → IAH Jul 20, 04:25 UTCJul 20, 06:40 UTC2h 15m
2026-07-19 UAL6 NRT → IAH Jul 19, 11:00 UTCJul 20, 06:40 UTC19h 40m
2026-07-19 UAL6 NRT → IAH Jul 19, 08:50 UTCJul 20, 06:40 UTC21h 50m
2026-07-19 UAL7 IAH → NRT Jul 19, 08:05 UTCJul 19, 10:10 UTC2h 5m
2026-07-19 UAL7 IAH → NRT Jul 19, 07:57 UTCJul 19, 12:27 UTC4h 30m
2026-07-19 UAL142 - Jul 19, 01:55 UTCJul 19, 06:10 UTC4h 15m
2026-07-18 UAL143 - Jul 18, 08:05 UTCJul 18, 08:40 UTC35m
2026-07-18 UAL143 NRT → ROR Jul 18, 08:12 UTCJul 18, 12:06 UTC3h 54m
2026-07-18 UAL196 GUM → NRT Jul 18, 02:29 UTCJul 18, 05:39 UTC3h 10m
2026-07-17 UAL197 - Jul 17, 08:20 UTCJul 17, 08:54 UTC35m
2026-07-16 UAL6 - Jul 16, 11:10 UTCJul 17, 06:29 UTC19h 20m
2026-07-16 UAL6 - Jul 16, 08:50 UTCJul 17, 06:29 UTC21h 40m
2026-07-16 UAL7 - Jul 16, 08:10 UTCJul 17, 06:29 UTC22h 20m
2026-07-16 UAL142 - Jul 16, 06:20 UTCJul 16, 06:25 UTC5m
2026-07-16 UAL142 - Jul 16, 02:00 UTCJul 16, 02:20 UTC20m
2026-07-16 UAL142 NRT → DEN Jul 16, 02:03 UTCJul 16, 06:02 UTC3h 59m
2026-07-15 UAL143 - Jul 15, 08:40 UTCJul 15, 12:30 UTC3h 50m
2026-07-14 UAL6 - Jul 14, 10:50 UTCJul 15, 06:20 UTC19h 29m
2026-07-14 UAL6 - Jul 14, 08:50 UTCJul 15, 06:20 UTC21h 29m
2026-07-14 UAL7 - Jul 14, 08:00 UTCJul 15, 06:20 UTC22h 19m
2026-07-14 UAL196 - Jul 14, 05:15 UTCJul 14, 06:05 UTC50m
2026-07-13 UAL196 - Jul 13, 08:50 UTCJul 14, 06:05 UTC21h 15m
2026-07-13 UAL197 - Jul 13, 08:15 UTCJul 13, 08:50 UTC35m
2026-07-13 UAL197 NRT → GUM Jul 13, 08:27 UTCJul 13, 11:19 UTC2h 52m
2026-07-13 UAL6 NRT → IAH Jul 13, 02:27 UTCJul 13, 06:35 UTC4h 8m
2026-07-12 UAL6 - Jul 12, 08:50 UTCJul 13, 06:45 UTC21h 55m
2026-07-12 UAL7 - Jul 12, 07:50 UTCJul 13, 06:45 UTC22h 55m
2026-07-12 UAL142 ROR → NRT Jul 12, 01:50 UTCJul 12, 06:10 UTC4h 20m
2026-07-11 UAL143 - Jul 11, 08:50 UTCJul 11, 12:45 UTC3h 55m
2026-07-11 UAL143 DEN → NRT Jul 11, 08:42 UTCJul 11, 12:38 UTC3h 56m

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 N17322 page for operator, model, and routing details .

Mode-S A1270B frequently asked

What is Mode-S code A1270B?
A1270B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N17322.
Where is Mode-S A1270B registered?
Mode-S code A1270B 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 A1270B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1270B, octal 50223413, decimal 10,561,291.
What flights does A1270B operate?
Mode-S A1270B has broadcast 20 distinct callsigns, including UAL6, UAL7, UAL197, UAL196, UAL143.