Apparatus

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sensors Mode-S transponder

A2007C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N228UA · BOEING 777-200 · operated by UNITED AIRLINES INC

Hex
A2007C
Octal
50400174
Decimal
10,616,956
Country
US
Tail
N228UA
Type
B772
No current signal · last broadcast Jul 26, 20:00 UTC
Flights observed
244
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:00 UTC

Last known position

Most recent position reported by Mode-S A2007C.

Country allocation

The ICAO 24-bit address A2007C 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
UAL943 United Airlines 12 2026-07-26
UAL34 United Airlines 11 2026-07-20
UAL942 United Airlines 10 2026-07-26
UAL853 - 10 2026-07-14
UAL852 - 10 2026-07-15
UAL35 United Airlines 10 2026-07-19
UAL195 - 10 2026-07-18
UAL933 United Airlines 8 2026-07-25
UAL932 United Airlines 8 2026-07-25
UAL924 United Airlines 8 2026-06-01
UAL102 United Airlines 8 2026-07-17
UAL990 - 7 2026-07-15
UAL4 United Airlines 7 2026-05-29
UAL880 United Airlines 6 2026-06-27
UAL927 United Airlines 5 2026-06-11
UAL926 - 5 2026-07-10
UAL914 - 5 2026-07-16
UAL889 United Airlines 5 2026-07-06
UAL876 - 5 2026-06-22
UAL59 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL943 LIS → IAD Jul 26, 12:50 UTCJul 26, 19:55 UTC7h 5m
2026-07-26 UAL942 IAD → LIS Jul 26, 03:15 UTCJul 26, 10:05 UTC6h 51m
2026-07-25 UAL933 FRA → IAD Jul 25, 15:55 UTCJul 25, 23:55 UTC8h 0m
2026-07-25 UAL932 IAD → FRA Jul 25, 03:05 UTCJul 25, 10:00 UTC6h 55m
2026-07-25 UAL932 IAD → FRA Jul 25, 02:48 UTCJul 25, 09:52 UTC7h 4m
2026-07-24 UAL933 FRA → IAD Jul 24, 16:27 UTCJul 24, 23:49 UTC7h 22m
2026-07-24 UAL933 FRA → IAD Jul 24, 15:45 UTCJul 24, 16:10 UTC25m
2026-07-24 UAL933 FRA → IAD Jul 24, 15:31 UTCJul 24, 23:48 UTC8h 17m
2026-07-24 UAL46 IAH → FRA Jul 24, 00:40 UTCJul 24, 09:50 UTC9h 10m
2026-07-22 UAL47 - Jul 22, 12:20 UTCJul 22, 22:25 UTC10h 5m
2026-07-22 UAL46 IAH → FRA Jul 22, 00:45 UTCJul 22, 03:35 UTC2h 50m
2026-07-21 UAL160 MUC → IAH Jul 21, 11:00 UTCJul 21, 21:35 UTC10h 35m
2026-07-20 UAL194 SFO → MUC Jul 20, 21:43 UTCJul 21, 08:17 UTC10h 34m
2026-07-20 UAL194 SFO → MUC Jul 20, 22:05 UTCJul 21, 08:20 UTC10h 15m
2026-07-20 UAL34 KIX → SFO Jul 20, 08:15 UTCJul 20, 17:45 UTC9h 30m
2026-07-20 UAL34 KIX → SFO Jul 20, 08:05 UTCJul 20, 17:55 UTC9h 50m
2026-07-19 UAL35 SFO → KIX Jul 19, 18:55 UTCJul 20, 05:30 UTC10h 35m
2026-07-18 UAL195 - Jul 18, 10:10 UTCJul 18, 12:20 UTC2h 10m
2026-07-18 UAL195 MUC → SFO Jul 18, 10:02 UTCJul 18, 21:27 UTC11h 25m
2026-07-18 UAL195 MUC → SFO Jul 18, 10:02 UTCJul 18, 21:29 UTC11h 27m
2026-07-17 UAL102 IAH → MUC Jul 17, 22:10 UTCJul 18, 02:09 UTC4h 0m
2026-07-17 UAL102 IAH → MUC Jul 17, 22:22 UTCJul 18, 07:52 UTC9h 30m
2026-07-17 UAL879 - Jul 17, 09:30 UTCJul 17, 18:50 UTC9h 20m
2026-07-16 UAL918 IAD → LHR Jul 16, 23:20 UTCJul 17, 06:10 UTC6h 50m
2026-07-16 UAL914 - Jul 16, 10:40 UTCJul 16, 18:19 UTC7h 40m
2026-07-16 UAL914 CDG → IAD Jul 16, 10:49 UTCJul 16, 18:19 UTC7h 30m
2026-07-15 UAL990 SFO → CDG Jul 15, 22:18 UTCJul 16, 08:11 UTC9h 53m
2026-07-15 UAL990 - Jul 15, 22:20 UTCJul 16, 00:50 UTC2h 30m
2026-07-15 UAL852 - Jul 15, 08:30 UTCJul 15, 18:40 UTC10h 10m
2026-07-15 UAL852 - Jul 15, 06:55 UTCJul 15, 07:15 UTC20m
2026-07-15 UAL852 TPE → SFO Jul 15, 06:51 UTCJul 15, 18:32 UTC11h 41m
2026-07-14 UAL853 - Jul 14, 19:40 UTCJul 14, 20:05 UTC25m
2026-07-14 UAL853 SFO → TPE Jul 14, 07:39 UTCJul 14, 20:06 UTC12h 27m
2026-07-14 UAL853 - Jul 14, 07:55 UTCJul 14, 18:35 UTC10h 40m
2026-07-13 UAL59 - Jul 13, 11:20 UTCJul 13, 22:30 UTC11h 10m
2026-07-13 UAL59 FRA → SFO Jul 13, 11:24 UTCJul 13, 22:26 UTC11h 2m
2026-07-12 UAL58 SFO → FRA Jul 12, 21:05 UTCJul 13, 07:05 UTC10h 0m
2026-07-10 UAL926 SFO → SFO Jul 10, 02:40 UTCJul 10, 03:35 UTC55m
2026-07-09 UAL45 - Jul 9, 12:25 UTCJul 9, 23:40 UTC11h 15m
2026-07-08 UAL44 SFO → ZRH Jul 8, 21:58 UTCJul 9, 08:28 UTC10h 30m
2026-07-08 UAL44 SFO → ZRH Jul 8, 22:00 UTCJul 9, 08:35 UTC10h 35m
2026-07-08 UAL852 TPE → SFO Jul 8, 06:51 UTCJul 8, 17:53 UTC11h 2m
2026-07-08 UAL852 - Jul 8, 06:30 UTCJul 8, 17:55 UTC11h 25m
2026-07-07 UAL853 - Jul 7, 19:45 UTCJul 7, 20:10 UTC25m
2026-07-07 UAL853 - Jul 7, 07:45 UTCJul 7, 18:40 UTC10h 55m
2026-07-06 UAL889 PEK → SFO Jul 6, 10:05 UTCJul 6, 10:15 UTC10m
2026-07-06 UAL889 PEK → SFO Jul 6, 09:51 UTCJul 6, 21:16 UTC11h 25m
2026-07-05 UAL888 SFO → PEK Jul 5, 18:20 UTCJul 6, 06:00 UTC11h 40m
2026-07-05 UAL97 BNE → SFO Jul 5, 01:08 UTCJul 5, 13:20 UTC12h 12m
2026-07-05 UAL97 - Jul 5, 01:15 UTCJul 5, 13:25 UTC12h 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 N228UA page for operator, model, and routing details .

Mode-S A2007C frequently asked

What is Mode-S code A2007C?
A2007C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N228UA.
Where is Mode-S A2007C registered?
Mode-S code A2007C 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 A2007C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2007C, octal 50400174, decimal 10,616,956.
What flights does A2007C operate?
Mode-S A2007C has broadcast 20 distinct callsigns, including UAL943, UAL34, UAL942, UAL853, UAL852.