Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6EDA1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N54552 · AIRBUS A-321neo · operated by UNITED AIRLINES INC

Hex
A6EDA1
Octal
51566641
Decimal
10,939,809
Country
US
Tail
N54552
Type
A21N
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
428
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S A6EDA1.

Country allocation

The ICAO 24-bit address A6EDA1 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
UAL746 United Airlines 7 2026-07-22
UAL2088 - 6 2026-07-10
UAL1253 - 6 2026-07-13
UAL1010 United Airlines 6 2026-05-18
UAL789 United Airlines 5 2026-07-22
UAL647 - 5 2026-07-09
UAL374 United Airlines 5 2026-07-26
UAL2643 - 5 2026-07-13
UAL2417 United Airlines 5 2026-06-07
UAL1996 - 5 2026-07-10
UAL1915 United Airlines 5 2026-05-15
UAL558 United Airlines 4 2026-06-05
UAL2343 United Airlines 4 2026-04-18
UAL2106 United Airlines 4 2026-07-22
UAL1998 United Airlines 4 2026-07-17
UAL1889 United Airlines 4 2026-07-23
UAL1779 United Airlines 4 2026-05-03
UAL1525 - 4 2026-07-03
UAL1479 - 4 2026-07-22
UAL1356 - 4 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL374 EWR → PBI Jul 26, 20:10 UTCJul 26, 22:10 UTC2h 0m
2026-07-26 UAL2466 SJC → DEN Jul 26, 15:55 UTCJul 26, 18:10 UTC2h 15m
2026-07-26 UAL284 AUS → EWR Jul 26, 12:15 UTCJul 26, 14:15 UTC2h 0m
2026-07-26 UAL1457 DEN → LGA Jul 26, 05:45 UTCJul 26, 09:25 UTC3h 41m
2026-07-26 UAL1457 DEN → LGA Jul 26, 05:40 UTCJul 26, 09:07 UTC3h 27m
2026-07-26 UAL540 PDX → DEN Jul 26, 02:20 UTCJul 26, 04:10 UTC1h 50m
2026-07-25 UAL2758 IAD → EWR Jul 25, 21:50 UTCJul 25, 23:45 UTC1h 55m
2026-07-25 UAL1013 DEN → LAX Jul 25, 18:15 UTCJul 25, 20:05 UTC1h 50m
2026-07-25 UAL1701 PHX → EWR Jul 25, 12:00 UTCJul 25, 15:35 UTC3h 35m
2026-07-25 UAL1745 SFO → IAH Jul 25, 06:10 UTCJul 25, 09:20 UTC3h 10m
2026-07-25 UAL1745 SFO → IAH Jul 25, 06:12 UTCJul 25, 09:18 UTC3h 6m
2026-07-25 UAL1214 DEN → EWR Jul 25, 01:10 UTCJul 25, 03:15 UTC2h 5m
2026-07-24 UAL1450 EWR → PBI Jul 24, 18:50 UTCJul 24, 20:55 UTC2h 5m
2026-07-24 UAL1450 EWR → PBI Jul 24, 14:45 UTCJul 24, 16:50 UTC2h 5m
2026-07-24 UAL475 EWR → MCO Jul 24, 01:50 UTCJul 24, 04:10 UTC2h 20m
2026-07-23 UAL484 DEN → LAS Jul 23, 21:35 UTCJul 24, 00:10 UTC2h 35m
2026-07-23 UAL484 DEN → LAS Jul 23, 21:42 UTCJul 24, 00:06 UTC2h 24m
2026-07-23 UAL1599 MSY → IAD Jul 23, 17:50 UTCJul 23, 19:45 UTC1h 55m
2026-07-23 UAL1889 SFO → IND Jul 23, 12:05 UTCJul 23, 14:05 UTC2h 0m
2026-07-23 UAL8111 ATL → YYZ Jul 23, 05:35 UTCJul 23, 07:35 UTC2h 0m
2026-07-22 UAL746 SRQ → EWR Jul 22, 20:27 UTCJul 23, 00:15 UTC3h 48m
2026-07-22 UAL746 SRQ → EWR Jul 22, 20:25 UTCJul 23, 00:15 UTC3h 50m
2026-07-22 UAL789 EWR → CLT Jul 22, 15:55 UTCJul 22, 18:46 UTC2h 51m
2026-07-22 UAL789 EWR → CLT Jul 22, 16:00 UTCJul 22, 18:55 UTC2h 55m
2026-07-22 UAL1479 SFO → DEN Jul 22, 12:20 UTCJul 22, 14:25 UTC2h 5m
2026-07-22 UAL2106 IAH → EWR Jul 22, 03:30 UTCJul 22, 05:25 UTC1h 55m
2026-07-21 UAL2487 RSW → EWR Jul 21, 21:40 UTCJul 22, 01:50 UTC4h 10m
2026-07-21 UAL1044 EWR → DEN Jul 21, 16:15 UTCJul 21, 19:55 UTC3h 40m
2026-07-21 UAL1775 SFO → PHX Jul 21, 12:50 UTCJul 21, 14:40 UTC1h 50m
2026-07-21 UAL1924 SAN → SFO Jul 21, 06:10 UTCJul 21, 09:05 UTC2h 55m
2026-07-21 UAL767 IAH → ANC Jul 21, 01:45 UTCJul 21, 03:50 UTC2h 5m
2026-07-20 UAL1023 DEN → ORD Jul 20, 21:15 UTCJul 20, 23:20 UTC2h 5m
2026-07-20 UAL2843 FRA → SFO Jul 20, 17:25 UTCJul 20, 19:20 UTC1h 55m
2026-07-20 UAL8210 DEN → SNA Jul 20, 13:55 UTCJul 20, 15:50 UTC1h 55m
2026-07-20 UAL495 BZN → EWR Jul 20, 03:20 UTCJul 20, 06:25 UTC3h 5m
2026-07-20 UAL495 BZN → EWR Jul 20, 03:10 UTCJul 20, 06:22 UTC3h 12m
2026-07-19 UAL421 BDL → IAD Jul 19, 22:20 UTCJul 20, 01:20 UTC3h 0m
2026-07-19 UAL2061 SAN → EWR Jul 19, 18:10 UTCJul 19, 20:05 UTC1h 55m
2026-07-19 UAL1638 DEN → LAX Jul 19, 14:20 UTCJul 19, 16:10 UTC1h 50m
2026-07-19 UAL2610 - Jul 19, 02:05 UTCJul 19, 03:55 UTC1h 50m
2026-07-18 UAL374 EWR → PBI Jul 18, 20:43 UTCJul 19, 00:37 UTC3h 54m
2026-07-18 UAL374 EWR → PBI Jul 18, 21:15 UTCJul 19, 00:40 UTC3h 25m
2026-07-18 UAL1069 - Jul 18, 14:50 UTCJul 18, 18:55 UTC4h 5m
2026-07-18 UAL1531 ORD → SAN Jul 18, 02:29 UTCJul 18, 06:00 UTC3h 31m
2026-07-17 UAL2113 - Jul 17, 20:25 UTCJul 18, 00:35 UTC4h 10m
2026-07-17 UAL2361 - Jul 17, 12:25 UTCJul 17, 15:55 UTC3h 30m
2026-07-17 UAL1998 ORF → ORD Jul 17, 01:39 UTCJul 17, 01:55 UTC15m
2026-07-16 UAL1998 ORF → ORD Jul 16, 23:40 UTCJul 17, 01:22 UTC1h 42m
2026-07-16 UAL1998 ORF → ORD Jul 16, 23:40 UTCJul 17, 01:55 UTC2h 15m
2026-07-16 UAL2329 ORD → EWR Jul 16, 19:45 UTCJul 16, 21:25 UTC1h 40m

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 N54552 page for operator, model, and routing details .

Mode-S A6EDA1 frequently asked

What is Mode-S code A6EDA1?
A6EDA1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N54552.
Where is Mode-S A6EDA1 registered?
Mode-S code A6EDA1 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 A6EDA1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6EDA1, octal 51566641, decimal 10,939,809.
What flights does A6EDA1 operate?
Mode-S A6EDA1 has broadcast 20 distinct callsigns, including UAL746, UAL2088, UAL1253, UAL1010, UAL789.