Apparatus

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sensors Mode-S transponder

A611DB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N490UA · AIRBUS A-320 · operated by UNITED AIRLINES INC

Hex
A611DB
Octal
51410733
Decimal
10,883,547
Country
US
Tail
N490UA
Type
A320
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
424
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A611DB.

Country allocation

The ICAO 24-bit address A611DB 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
UAL817 - 6 2026-07-14
UAL724 United Airlines 5 2026-07-26
UAL1062 - 5 2026-06-17
UAL671 United Airlines 4 2026-06-09
UAL489 United Airlines 4 2026-07-07
UAL397 - 4 2026-07-12
UAL396 United Airlines 4 2026-06-09
UAL303 - 4 2026-06-27
UAL2838 United Airlines 4 2026-07-25
UAL2413 - 4 2026-06-17
UAL2380 United Airlines 4 2026-05-13
UAL2211 United Airlines 4 2026-05-19
UAL1580 United Airlines 4 2026-05-18
UAL1220 - 4 2026-07-10
UAL790 - 3 2026-06-18
UAL737 United Airlines 3 2026-06-13
UAL718 - 3 2026-07-14
UAL561 United Airlines 3 2026-05-12
UAL485 United Airlines 3 2026-05-06
UAL3924 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL235 IAH → LGA Jul 26, 20:35 UTCJul 26, 22:45 UTC2h 10m
2026-07-26 UAL2424 LAX → BOS Jul 26, 16:40 UTCJul 26, 19:05 UTC2h 25m
2026-07-26 UAL724 HNL → SFO Jul 26, 13:50 UTCJul 26, 14:55 UTC1h 5m
2026-07-26 UAL333 BOS → LAX Jul 26, 02:00 UTCJul 26, 03:00 UTC1h 0m
2026-07-25 UAL720 PHL → DEN Jul 25, 21:05 UTCJul 25, 23:55 UTC2h 50m
2026-07-25 UAL2787 GUM → SFO Jul 25, 17:15 UTCJul 25, 19:35 UTC2h 20m
2026-07-25 UAL2838 HKG → SFO Jul 25, 14:20 UTCJul 25, 15:30 UTC1h 10m
2026-07-25 UAL2838 HKG → SFO Jul 25, 14:35 UTCJul 25, 15:32 UTC57m
2026-07-25 UAL1216 EWR → ATL Jul 25, 01:40 UTCJul 25, 03:30 UTC1h 50m
2026-07-24 UAL579 SJD → IAH Jul 24, 17:35 UTCJul 24, 23:20 UTC5h 45m
2026-07-24 UAL2366 SFO → LAS Jul 24, 13:00 UTCJul 24, 15:50 UTC2h 50m
2026-07-24 UAL2157 SEA → SFO Jul 24, 02:15 UTCJul 24, 04:50 UTC2h 35m
2026-07-23 UAL1166 SAN → EWR Jul 23, 21:40 UTCJul 23, 23:00 UTC1h 20m
2026-07-23 UAL304 - Jul 23, 17:30 UTCJul 23, 18:40 UTC1h 10m
2026-07-23 UAL304 IAH → PVR Jul 23, 17:38 UTCJul 23, 19:21 UTC1h 43m
2026-07-23 UAL2366 SFO → LAS Jul 23, 13:15 UTCJul 23, 16:00 UTC2h 45m
2026-07-23 UAL2157 SEA → SFO Jul 23, 01:50 UTCJul 23, 04:35 UTC2h 45m
2026-07-22 UAL3905 TPE → SFO Jul 22, 21:18 UTCJul 22, 23:57 UTC2h 39m
2026-07-22 UAL3905 TPE → SFO Jul 22, 21:00 UTCJul 23, 00:00 UTC3h 0m
2026-07-14 UAL2187 - Jul 14, 22:05 UTCJul 14, 23:15 UTC1h 9m
2026-07-14 UAL2115 SFO → BUR Jul 14, 20:10 UTCJul 14, 21:00 UTC50m
2026-07-14 UAL718 - Jul 14, 13:45 UTCJul 14, 17:40 UTC3h 55m
2026-07-14 UAL817 - Jul 14, 02:15 UTCJul 14, 02:35 UTC20m
2026-07-13 UAL817 - Jul 13, 22:25 UTCJul 14, 00:35 UTC2h 10m
2026-07-13 UAL1613 PDX → SFO Jul 13, 19:10 UTCJul 13, 20:45 UTC1h 35m
2026-07-13 UAL2265 SFO → PDX Jul 13, 15:45 UTCJul 13, 17:05 UTC1h 20m
2026-07-13 UAL2265 SFO → PDX Jul 13, 15:44 UTCJul 13, 17:01 UTC1h 17m
2026-07-13 UAL2241 SEA → SFO Jul 13, 04:30 UTCJul 13, 06:20 UTC1h 50m
2026-07-12 UAL2013 DEN → SEA Jul 12, 22:05 UTCJul 13, 00:25 UTC2h 20m
2026-07-12 UAL1305 MSP → DEN Jul 12, 18:51 UTCJul 12, 20:16 UTC1h 25m
2026-07-12 UAL397 DEN → MSP Jul 12, 16:01 UTCJul 12, 17:22 UTC1h 21m
2026-07-12 UAL397 DEN → MSP Jul 12, 15:50 UTCJul 12, 17:25 UTC1h 35m
2026-07-12 UAL2329 - Jul 12, 12:25 UTCJul 12, 14:30 UTC2h 5m
2026-07-12 UAL1237 - Jul 12, 01:40 UTCJul 12, 02:45 UTC1h 5m
2026-07-12 UAL1237 DEN → SBP Jul 12, 01:40 UTCJul 12, 03:42 UTC2h 2m
2026-07-11 UAL2609 - Jul 11, 20:25 UTCJul 11, 23:30 UTC3h 5m
2026-07-11 UAL1633 - Jul 11, 16:10 UTCJul 11, 18:50 UTC2h 40m
2026-07-11 UAL1506 SDF → DEN Jul 11, 12:10 UTCJul 11, 14:40 UTC2h 30m
2026-07-11 UAL2027 - Jul 11, 01:10 UTCJul 11, 03:30 UTC2h 20m
2026-07-10 UAL1762 - Jul 10, 19:35 UTCJul 10, 22:35 UTC3h 0m
2026-07-10 UAL2427 - Jul 10, 16:15 UTCJul 10, 18:20 UTC2h 5m
2026-07-10 UAL1338 - Jul 10, 13:05 UTCJul 10, 13:55 UTC50m
2026-07-10 UAL1220 DEN → DTW Jul 10, 04:55 UTCJul 10, 07:35 UTC2h 40m
2026-07-10 UAL1220 DEN → DTW Jul 10, 04:58 UTCJul 10, 07:32 UTC2h 34m
2026-07-10 UAL1841 - Jul 10, 01:50 UTCJul 10, 03:35 UTC1h 45m
2026-07-10 UAL1841 SMF → DEN Jul 10, 01:47 UTCJul 10, 03:38 UTC1h 51m
2026-07-09 UAL1208 DEN → SMF Jul 9, 22:25 UTCJul 10, 00:35 UTC2h 10m
2026-07-09 UAL1305 MSP → DEN Jul 9, 18:55 UTCJul 9, 20:35 UTC1h 40m
2026-07-09 UAL397 DEN → MSP Jul 9, 16:05 UTCJul 9, 17:35 UTC1h 30m
2026-07-09 UAL1978 - Jul 9, 13:30 UTCJul 9, 14:10 UTC40m

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 N490UA page for operator, model, and routing details .

Mode-S A611DB frequently asked

What is Mode-S code A611DB?
A611DB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N490UA.
Where is Mode-S A611DB registered?
Mode-S code A611DB 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 A611DB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A611DB, octal 51410733, decimal 10,883,547.
What flights does A611DB operate?
Mode-S A611DB has broadcast 20 distinct callsigns, including UAL817, UAL724, UAL1062, UAL671, UAL489.