Apparatus

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sensors Mode-S transponder

A05DBA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N12216 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
A05DBA
Octal
50056672
Decimal
10,509,754
Country
US
Tail
N12216
Type
B738
Broadcasting now · callsign UAL2366 · 2,275 ft
Flights observed
128
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Current position

A05DBA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A05DBA 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
UAL2199 - 4 2026-07-13
UAL669 - 3 2026-07-13
UAL1301 - 3 2026-07-16
UAL8159 United Airlines 2 2026-07-22
UAL763 United Airlines 2 2026-07-08
UAL725 United Airlines 2 2026-07-25
UAL691 United Airlines 2 2026-07-24
UAL687 United Airlines 2 2026-07-21
UAL630T - 2 2026-07-10
UAL582 - 2 2026-07-17
UAL571 United Airlines 2 2026-07-06
UAL4212 United Airlines 2 2026-04-24
UAL347 - 2 2026-07-15
UAL296 United Airlines 2 2026-07-20
UAL235 United Airlines 2 2026-07-21
UAL2279 - 2 2026-07-04
UAL2275 United Airlines 2 2026-07-26
UAL2257 United Airlines 2 2026-07-20
UAL2166 - 2 2026-07-22
UAL2151 United Airlines 2 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2275 SEA → IAD Jul 26, 21:10 UTCJul 26, 22:30 UTC1h 20m
2026-07-26 UAL2459 DEN → YYC Jul 26, 17:35 UTCJul 26, 19:35 UTC2h 0m
2026-07-26 UAL1402 DEN → CVG Jul 26, 13:30 UTCJul 26, 15:50 UTC2h 20m
2026-07-26 UAL402 EWR → BOS Jul 26, 00:10 UTCJul 26, 02:10 UTC2h 0m
2026-07-25 UAL1843 SFO → ORD Jul 25, 20:50 UTCJul 25, 22:25 UTC1h 35m
2026-07-25 UAL1294 DEN → YEG Jul 25, 17:50 UTCJul 25, 19:20 UTC1h 30m
2026-07-25 UAL1320 SFO → ONT Jul 25, 12:25 UTCJul 25, 15:40 UTC3h 15m
2026-07-25 UAL2350 SAN → ORD Jul 25, 04:15 UTCJul 25, 07:05 UTC2h 50m
2026-07-25 UAL725 ORD → SFO Jul 25, 01:45 UTCJul 25, 02:55 UTC1h 10m
2026-07-25 UAL725 ORD → SFO Jul 25, 01:42 UTCJul 25, 02:49 UTC1h 7m
2026-07-24 UAL691 ORD → IAH Jul 24, 22:05 UTCJul 24, 23:10 UTC1h 5m
2026-07-24 UAL691 ORD → IAH Jul 24, 22:07 UTCJul 24, 23:07 UTC1h 0m
2026-07-24 UAL1788 SFO → IAH Jul 24, 20:10 UTCJul 24, 20:45 UTC35m
2026-07-24 UAL1788 SFO → IAH Jul 24, 20:04 UTCJul 24, 20:53 UTC49m
2026-07-24 UAL1714 LAS → IAH Jul 24, 18:10 UTCJul 24, 18:30 UTC20m
2026-07-24 UAL2750 PVR → SFO Jul 24, 12:20 UTCJul 24, 16:05 UTC3h 45m
2026-07-24 UAL1662 EWR → SFO Jul 24, 00:05 UTCJul 24, 03:10 UTC3h 5m
2026-07-23 UAL1953 SAV → EWR Jul 23, 19:40 UTCJul 23, 21:40 UTC2h 0m
2026-07-23 UAL1953 SAV → EWR Jul 23, 19:41 UTCJul 23, 21:41 UTC2h 0m
2026-07-23 UAL1832 CUN → IAH Jul 23, 13:25 UTCJul 23, 17:55 UTC4h 30m
2026-07-22 UAL2275 SEA → IAD Jul 22, 21:10 UTCJul 23, 00:40 UTC3h 30m
2026-07-22 UAL8159 ORD → PHL Jul 22, 17:40 UTCJul 22, 19:35 UTC1h 55m
2026-07-22 UAL8159 ORD → PHL Jul 22, 17:45 UTCJul 22, 19:34 UTC1h 49m
2026-07-22 UAL2789 GUM → SFO Jul 22, 14:40 UTCJul 22, 15:45 UTC1h 5m
2026-07-22 UAL2166 DEN → ICT Jul 22, 01:11 UTCJul 22, 01:55 UTC44m
2026-07-22 UAL2166 - Jul 22, 01:00 UTCJul 22, 01:55 UTC55m
2026-07-21 UAL235 IAH → LGA Jul 21, 20:50 UTCJul 21, 23:35 UTC2h 45m
2026-07-21 UAL235 IAH → LGA Jul 21, 20:41 UTCJul 21, 23:30 UTC2h 49m
2026-07-21 UAL2424 LAX → BOS Jul 21, 16:30 UTCJul 21, 18:55 UTC2h 25m
2026-07-21 UAL687 EWR → IAH Jul 21, 13:20 UTCJul 21, 14:05 UTC45m
2026-07-21 UAL687 EWR → IAH Jul 21, 13:17 UTCJul 21, 14:05 UTC48m
2026-07-21 UAL1390 LAS → EWR Jul 21, 01:40 UTCJul 21, 02:15 UTC35m
2026-07-20 UAL296 ORD → FSD Jul 20, 21:20 UTCJul 20, 22:50 UTC1h 30m
2026-07-20 UAL296 ORD → FSD Jul 20, 20:09 UTCJul 20, 22:43 UTC2h 34m
2026-07-20 UAL2257 SNA → EWR Jul 20, 16:10 UTCJul 20, 16:30 UTC20m
2026-07-20 UAL2257 SNA → EWR Jul 20, 15:56 UTCJul 20, 18:54 UTC2h 58m
2026-07-20 UAL1188 RDM → DEN Jul 20, 12:10 UTCJul 20, 14:10 UTC2h 0m
2026-07-20 UAL1588 DEN → RDM Jul 20, 01:49 UTCJul 20, 04:00 UTC2h 11m
2026-07-20 UAL1588 DEN → RDM Jul 20, 01:55 UTCJul 20, 03:55 UTC2h 0m
2026-07-19 UAL2085 EWR → AUS Jul 19, 21:40 UTCJul 19, 23:50 UTC2h 10m
2026-07-19 UAL2051 SFO → YVR Jul 19, 18:40 UTCJul 19, 20:20 UTC1h 40m
2026-07-19 UAL2051 SFO → YVR Jul 19, 18:29 UTCJul 19, 20:27 UTC1h 58m
2026-07-19 UAL1293 - Jul 19, 12:40 UTCJul 19, 16:30 UTC3h 50m
2026-07-18 UAL213 SFO → EWR Jul 18, 18:05 UTCJul 18, 19:55 UTC1h 50m
2026-07-18 UAL525 AUS → IAD Jul 18, 13:30 UTCJul 18, 16:25 UTC2h 55m
2026-07-17 UAL2337 IAD → AUS Jul 17, 22:35 UTCJul 18, 01:20 UTC2h 45m
2026-07-17 UAL1140 LAS → IAD Jul 17, 15:55 UTCJul 17, 20:04 UTC4h 10m
2026-07-17 UAL582 - Jul 17, 13:20 UTCJul 17, 14:30 UTC1h 10m
2026-07-17 UAL582 SFO → LAS Jul 17, 13:19 UTCJul 17, 14:25 UTC1h 6m
2026-07-16 UAL1189 - Jul 16, 16:35 UTCJul 16, 23:10 UTC6h 35m

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 N12216 page for operator, model, and routing details .

Mode-S A05DBA frequently asked

What is Mode-S code A05DBA?
A05DBA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N12216.
Where is Mode-S A05DBA registered?
Mode-S code A05DBA 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 A05DBA broadcasting right now?
Yes. Mode-S A05DBA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05DBA, octal 50056672, decimal 10,509,754.
What flights does A05DBA operate?
Mode-S A05DBA has broadcast 20 distinct callsigns, including UAL2199, UAL669, UAL1301, UAL8159, UAL763.