Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A2F200

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N28912 · BOEING 787-8 Dreamliner · operated by UNITED AIRLINES INC

Hex
A2F200
Octal
50571000
Decimal
10,678,784
Country
US
Tail
N28912
Type
B788
No current signal · last broadcast Jul 26, 07:40 UTC
Flights observed
221
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 07:40 UTC

Last known position

Most recent position reported by Mode-S A2F200.

Country allocation

The ICAO 24-bit address A2F200 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
UAL952 - 23 2026-07-09
UAL953 United Airlines 20 2026-07-16
UAL109 - 14 2026-07-17
UAL982 United Airlines 13 2026-07-24
UAL983 United Airlines 12 2026-07-25
UAL108 United Airlines 11 2026-07-05
UAL980 - 10 2026-07-14
UAL909 - 10 2026-07-15
UAL908 - 10 2026-07-16
UAL981 - 9 2026-07-14
UAL770 - 8 2026-07-12
UAL997 United Airlines 7 2026-05-14
UAL992 United Airlines 7 2026-07-23
UAL612 United Airlines 7 2026-07-20
UAL991 United Airlines 6 2026-07-24
UAL769 - 6 2026-07-12
UAL613 United Airlines 6 2026-07-21
UAL1147 United Airlines 6 2026-06-11
UAL543 United Airlines 5 2026-04-24
UAL422 United Airlines 5 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 UAL996 IAD → ACC Jul 25, 23:36 UTCJul 26, 09:46 UTC10h 10m
2026-07-25 UAL996 IAD → ACC Jul 25, 23:55 UTCJul 26, 00:45 UTC50m
2026-07-25 UAL983 ATH → IAD Jul 25, 09:05 UTCJul 25, 19:29 UTC10h 24m
2026-07-25 UAL983 ATH → IAD Jul 25, 09:25 UTCJul 25, 12:00 UTC2h 35m
2026-07-24 UAL982 IAD → ATH Jul 24, 22:10 UTCJul 25, 07:15 UTC9h 5m
2026-07-24 UAL982 IAD → ATH Jul 24, 21:58 UTCJul 25, 07:11 UTC9h 13m
2026-07-24 UAL991 BCN → IAD Jul 24, 09:45 UTCJul 24, 18:00 UTC8h 15m
2026-07-23 UAL992 IAD → BCN Jul 23, 22:56 UTCJul 24, 06:26 UTC7h 30m
2026-07-23 UAL992 IAD → BCN Jul 23, 23:15 UTCJul 24, 06:00 UTC6h 45m
2026-07-23 UAL983 ATH → IAD Jul 23, 09:25 UTCJul 23, 19:45 UTC10h 20m
2026-07-22 UAL982 IAD → ATH Jul 22, 22:08 UTCJul 23, 07:21 UTC9h 13m
2026-07-22 UAL982 IAD → ATH Jul 22, 22:00 UTCJul 22, 23:50 UTC1h 50m
2026-07-22 UAL344 - Jul 22, 01:45 UTCJul 22, 01:55 UTC10m
2026-07-21 UAL345 - Jul 21, 12:50 UTCJul 21, 22:25 UTC9h 35m
2026-07-21 UAL613 LOS → IAD Jul 21, 01:20 UTCJul 21, 09:25 UTC8h 5m
2026-07-20 UAL613 LOS → IAD Jul 20, 10:30 UTCJul 21, 09:25 UTC22h 55m
2026-07-20 UAL612 IAD → LOS Jul 20, 04:05 UTCJul 21, 02:15 UTC22h 10m
2026-07-20 UAL612 IAD → LOS Jul 20, 03:40 UTCJul 20, 11:25 UTC7h 45m
2026-07-20 UAL612 IAD → LOS Jul 20, 03:33 UTCJul 20, 13:50 UTC10h 17m
2026-07-19 UAL983 ATH → IAD Jul 19, 12:25 UTCJul 19, 22:45 UTC10h 20m
2026-07-18 UAL982 IAD → ATH Jul 18, 22:55 UTCJul 19, 08:00 UTC9h 5m
2026-07-18 UAL991 BCN → IAD Jul 18, 09:35 UTCJul 18, 18:15 UTC8h 40m
2026-07-18 UAL991 BCN → IAD Jul 18, 09:37 UTCJul 18, 18:13 UTC8h 36m
2026-07-17 UAL992 IAD → BCN Jul 17, 22:56 UTCJul 18, 06:01 UTC7h 5m
2026-07-17 UAL992 - Jul 17, 22:55 UTCJul 18, 06:00 UTC7h 6m
2026-07-17 UAL109 - Jul 17, 10:35 UTCJul 17, 12:00 UTC1h 25m
2026-07-17 UAL109 MUC → IAD Jul 17, 10:19 UTCJul 17, 18:53 UTC8h 34m
2026-07-16 UAL953 ORD → MUC Jul 16, 23:40 UTCJul 17, 07:50 UTC8h 10m
2026-07-16 UAL908 AMS → ORD Jul 16, 10:35 UTCJul 16, 18:29 UTC7h 55m
2026-07-15 UAL909 - Jul 15, 23:50 UTCJul 16, 07:10 UTC7h 20m
2026-07-15 UAL908 - Jul 15, 11:00 UTCJul 15, 12:20 UTC1h 20m
2026-07-15 UAL908 AMS → ORD Jul 15, 10:40 UTCJul 15, 18:29 UTC7h 49m
2026-07-15 UAL909 ORD → AMS Jul 15, 00:00 UTCJul 15, 07:15 UTC7h 15m
2026-07-14 UAL981 - Jul 14, 18:00 UTCJul 14, 18:05 UTC5m
2026-07-14 UAL981 - Jul 14, 11:00 UTCJul 14, 16:00 UTC5h 0m
2026-07-14 UAL981 DUB → ORD Jul 14, 10:53 UTCJul 14, 17:45 UTC6h 52m
2026-07-14 UAL980 - Jul 14, 01:50 UTCJul 14, 04:00 UTC2h 10m
2026-07-14 UAL980 ORD → DUB Jul 14, 01:58 UTCJul 14, 08:41 UTC6h 43m
2026-07-12 UAL770 - Jul 12, 21:55 UTCJul 12, 22:00 UTC5m
2026-07-12 UAL770 BCN → ORD Jul 12, 13:41 UTCJul 12, 21:40 UTC7h 59m
2026-07-12 UAL770 - Jul 12, 13:25 UTCJul 12, 20:01 UTC6h 35m
2026-07-12 UAL769 ORD → BCN Jul 12, 03:13 UTCJul 12, 10:56 UTC7h 43m
2026-07-12 UAL769 - Jul 12, 03:05 UTCJul 12, 10:55 UTC7h 50m
2026-07-11 UAL770 BCN → ORD Jul 11, 13:30 UTCJul 11, 22:05 UTC8h 35m
2026-07-11 UAL769 - Jul 11, 03:01 UTCJul 11, 10:55 UTC7h 55m
2026-07-10 UAL908 - Jul 10, 10:20 UTCJul 10, 18:20 UTC8h 0m
2026-07-10 UAL909 PWK → AMS Jul 10, 00:00 UTCJul 10, 07:10 UTC7h 10m
2026-07-10 UAL909 ORD → AMS Jul 10, 00:12 UTCJul 10, 06:56 UTC6h 44m
2026-07-09 UAL952 ORD → ORD Jul 9, 19:20 UTCJul 9, 19:25 UTC5m
2026-07-09 UAL952 - Jul 9, 10:35 UTCJul 9, 19:25 UTC8h 50m

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 N28912 page for operator, model, and routing details .

Mode-S A2F200 frequently asked

What is Mode-S code A2F200?
A2F200 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N28912.
Where is Mode-S A2F200 registered?
Mode-S code A2F200 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 A2F200 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2F200, octal 50571000, decimal 10,678,784.
What flights does A2F200 operate?
Mode-S A2F200 has broadcast 20 distinct callsigns, including UAL952, UAL953, UAL109, UAL982, UAL983.