Apparatus

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sensors Mode-S transponder

A46D8F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N38473 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A46D8F
Octal
51066617
Decimal
10,775,951
Country
US
Tail
N38473
Type
B739
Broadcasting now · callsign UAL702 · 33,000 ft
Flights observed
381
Distinct callsigns
20
Country
US
Last broadcast
21m ago

Current position

A46D8F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A46D8F 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
UAL2163 - 5 2026-07-13
UAL2741 - 4 2026-06-24
UAL2136 United Airlines 4 2026-06-02
UAL1587 United Airlines 4 2026-05-21
UAL1524 United Airlines 4 2026-06-02
UAL1105 - 4 2026-06-30
UAL706 - 3 2026-06-28
UAL654 United Airlines 3 2026-04-17
UAL583 - 3 2026-07-11
UAL517 - 3 2026-04-13
UAL2683 United Airlines 3 2026-05-19
UAL2463 - 3 2026-06-29
UAL2322 - 3 2026-06-16
UAL2155 United Airlines 3 2026-06-17
UAL1966 - 3 2026-06-25
UAL1900 - 3 2026-07-05
UAL1811 United Airlines 3 2026-05-09
UAL1686 United Airlines 3 2026-06-05
UAL1659 - 3 2026-05-20
UAL1227 - 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL702 - Jul 14, 16:15 UTCJul 14, 19:45 UTC3h 30m
2026-07-14 UAL1954 SMF → SFO Jul 14, 13:10 UTCJul 14, 13:35 UTC25m
2026-07-14 UAL1268 DEN → SMF Jul 14, 03:10 UTCJul 14, 05:05 UTC1h 55m
2026-07-13 UAL682 - Jul 13, 23:15 UTCJul 14, 01:25 UTC2h 10m
2026-07-13 UAL682 SAN → DEN Jul 13, 23:16 UTCJul 14, 01:14 UTC1h 58m
2026-07-13 UAL2163 IAD → SAN Jul 13, 17:00 UTCJul 13, 21:15 UTC4h 15m
2026-07-13 UAL1691 EWR → IAD Jul 13, 14:30 UTCJul 13, 15:15 UTC45m
2026-07-13 UAL2147 IAD → EWR Jul 13, 10:45 UTCJul 13, 11:36 UTC51m
2026-07-13 UAL2147 IAD → EWR Jul 13, 10:45 UTCJul 13, 11:35 UTC50m
2026-07-13 UAL2775 - Jul 13, 01:50 UTCJul 13, 04:20 UTC2h 30m
2026-07-12 UAL2078 - Jul 12, 20:25 UTCJul 13, 00:15 UTC3h 50m
2026-07-12 UAL1882 - Jul 12, 15:30 UTCJul 12, 18:45 UTC3h 15m
2026-07-12 UAL1882 IAH → SJC Jul 12, 15:24 UTCJul 12, 18:40 UTC3h 16m
2026-07-12 UAL2425 EWR → IAH Jul 12, 01:45 UTCJul 12, 04:54 UTC3h 9m
2026-07-12 UAL2425 - Jul 12, 01:50 UTCJul 12, 04:55 UTC3h 5m
2026-07-11 UAL583 MCO → EWR Jul 11, 21:25 UTCJul 11, 23:45 UTC2h 20m
2026-07-10 UAL1932 - Jul 10, 23:25 UTCJul 11, 01:30 UTC2h 5m
2026-07-10 UAL1643 - Jul 10, 19:00 UTCJul 10, 21:10 UTC2h 11m
2026-07-10 UAL1643 MCO → EWR Jul 10, 18:53 UTCJul 10, 21:04 UTC2h 11m
2026-07-10 UAL1739 - Jul 10, 14:20 UTCJul 10, 16:25 UTC2h 5m
2026-07-10 UAL606 - Jul 10, 03:10 UTCJul 10, 04:45 UTC1h 35m
2026-07-09 UAL2370 SMF → ORD Jul 9, 14:15 UTCJul 9, 17:50 UTC3h 35m
2026-07-08 UAL1920 ORD → SMF Jul 8, 22:45 UTCJul 9, 02:40 UTC3h 55m
2026-07-08 UAL1215 - Jul 8, 15:40 UTCJul 8, 17:25 UTC1h 45m
2026-07-08 UAL2622 ORD → SAV Jul 8, 12:25 UTCJul 8, 14:05 UTC1h 40m
2026-07-08 UAL546 EWR → ORD Jul 8, 01:32 UTCJul 8, 02:59 UTC1h 27m
2026-07-08 UAL546 EWR → ORD Jul 8, 01:25 UTCJul 8, 03:10 UTC1h 45m
2026-07-07 UAL555 ATL → EWR Jul 7, 21:30 UTCJul 8, 00:05 UTC2h 35m
2026-07-07 UAL1307 EWR → ATL Jul 7, 17:15 UTCJul 7, 18:55 UTC1h 40m
2026-07-07 UAL1307 EWR → ATL Jul 7, 17:22 UTCJul 7, 18:52 UTC1h 30m
2026-07-07 UAL1227 MCO → EWR Jul 7, 13:25 UTCJul 7, 15:25 UTC2h 0m
2026-07-07 UAL8176 EWR → MCO Jul 7, 02:00 UTCJul 7, 04:30 UTC2h 30m
2026-07-06 UAL2796 - Jul 6, 22:25 UTCJul 7, 00:10 UTC1h 45m
2026-07-06 UAL2678 - Jul 6, 17:50 UTCJul 6, 19:50 UTC2h 0m
2026-07-06 UAL2678 EWR → JAX Jul 6, 17:32 UTCJul 6, 19:44 UTC2h 12m
2026-07-06 UAL1227 - Jul 6, 13:25 UTCJul 6, 15:55 UTC2h 30m
2026-07-05 UAL1900 EWR → MCO Jul 5, 22:30 UTCJul 6, 00:48 UTC2h 18m
2026-07-05 UAL1900 - Jul 5, 22:40 UTCJul 6, 01:00 UTC2h 20m
2026-07-05 UAL2371 - Jul 5, 17:35 UTCJul 5, 20:40 UTC3h 5m
2026-07-05 UAL2371 IAH → EWR Jul 5, 17:36 UTCJul 5, 20:45 UTC3h 9m
2026-07-05 UAL1059 - Jul 5, 13:00 UTCJul 5, 14:50 UTC1h 50m
2026-07-05 UAL1075 - Jul 5, 07:05 UTCJul 5, 11:15 UTC4h 10m
2026-07-05 UAL2850 - Jul 5, 04:25 UTCJul 5, 05:20 UTC55m
2026-07-04 UAL1334 - Jul 4, 21:15 UTCJul 5, 01:30 UTC4h 15m
2026-07-04 UAL2138 - Jul 4, 18:30 UTCJul 4, 19:00 UTC30m
2026-07-04 UAL2138 GRR → ORD Jul 4, 18:13 UTCJul 4, 18:43 UTC30m
2026-07-04 UAL1297 ORD → GRR Jul 4, 16:00 UTCJul 4, 16:30 UTC30m
2026-07-04 UAL1733 - Jul 4, 11:30 UTCJul 4, 13:45 UTC2h 15m
2026-07-04 UAL1733 JAX → ORD Jul 4, 11:31 UTCJul 4, 13:26 UTC1h 55m
2026-07-04 UAL2335 - Jul 4, 03:20 UTCJul 4, 05:10 UTC1h 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 N38473 page for operator, model, and routing details .

Mode-S A46D8F frequently asked

What is Mode-S code A46D8F?
A46D8F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N38473.
Where is Mode-S A46D8F registered?
Mode-S code A46D8F 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 A46D8F broadcasting right now?
Yes. Mode-S A46D8F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A46D8F, octal 51066617, decimal 10,775,951.
What flights does A46D8F operate?
Mode-S A46D8F has broadcast 20 distinct callsigns, including UAL2163, UAL2741, UAL2136, UAL1587, UAL1524.