Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9D5E7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N73278 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
A9D5E7
Octal
52352747
Decimal
11,130,343
Country
US
Tail
N73278
Type
B738
No current signal · last broadcast Jul 26, 18:45 UTC
Flights observed
486
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:45 UTC

Last known position

Most recent position reported by Mode-S A9D5E7.

Country allocation

The ICAO 24-bit address A9D5E7 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
UAL325 - 5 2026-07-17
UAL275 United Airlines 5 2026-07-23
UAL1911 United Airlines 5 2026-07-23
UAL685 United Airlines 4 2026-07-24
UAL235 United Airlines 4 2026-05-03
UAL2059 - 4 2026-06-23
UAL202 United Airlines 4 2026-07-24
UAL1534 United Airlines 4 2026-07-20
UAL1217 - 4 2026-07-09
UAL1003 - 4 2026-07-18
UAL786 United Airlines 3 2026-07-25
UAL741 United Airlines 3 2026-06-04
UAL707 - 3 2026-06-22
UAL687 United Airlines 3 2026-07-19
UAL623 - 3 2026-06-29
UAL532 - 3 2026-06-22
UAL337 - 3 2026-07-03
UAL295 - 3 2026-07-01
UAL2821 - 3 2026-06-29
UAL2748 United Airlines 3 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2383 PHL → DEN Jul 26, 18:15 UTCJul 26, 18:45 UTC30m
2026-07-26 UAL2789 GUM → SFO Jul 26, 15:40 UTCJul 26, 16:35 UTC55m
2026-07-26 UAL2166 TPA → SFO Jul 26, 01:10 UTCJul 26, 02:10 UTC1h 0m
2026-07-25 UAL517 JFK → LAX Jul 25, 19:45 UTCJul 25, 23:20 UTC3h 35m
2026-07-25 UAL786 ATL → EWR Jul 25, 16:30 UTCJul 25, 18:10 UTC1h 40m
2026-07-25 UAL1491 PHL → ORD Jul 25, 13:15 UTCJul 25, 14:20 UTC1h 5m
2026-07-25 UAL1851 PDX → IAH Jul 25, 01:43 UTCJul 25, 02:34 UTC51m
2026-07-25 UAL1851 PDX → IAH Jul 25, 01:35 UTCJul 25, 02:35 UTC1h 0m
2026-07-24 UAL2299 LAS → SFO Jul 24, 21:45 UTCJul 24, 23:45 UTC2h 0m
2026-07-24 UAL685 IAH → EWR Jul 24, 18:29 UTCJul 24, 20:19 UTC1h 50m
2026-07-24 UAL685 IAH → EWR Jul 24, 18:35 UTCJul 24, 20:25 UTC1h 50m
2026-07-24 UAL202 PWM → ORD Jul 24, 13:30 UTCJul 24, 16:15 UTC2h 45m
2026-07-24 UAL2621 IAH → SFO Jul 24, 02:50 UTCJul 24, 03:15 UTC25m
2026-07-23 UAL1911 IAD → EWR Jul 23, 22:40 UTCJul 23, 23:05 UTC25m
2026-07-23 UAL1911 IAD → EWR Jul 23, 21:55 UTCJul 23, 22:05 UTC10m
2026-07-23 UAL1911 IAD → EWR Jul 23, 22:01 UTCJul 24, 01:00 UTC2h 59m
2026-07-23 UAL275 EWR → SFO Jul 23, 20:20 UTCJul 23, 20:30 UTC10m
2026-07-23 UAL275 EWR → SFO Jul 23, 18:00 UTCJul 23, 19:40 UTC1h 40m
2026-07-23 UAL275 EWR → SFO Jul 23, 17:56 UTCJul 23, 20:26 UTC2h 30m
2026-07-23 UAL251 - Jul 23, 14:30 UTCJul 23, 16:15 UTC1h 45m
2026-07-23 UAL1381 IAH → SAN Jul 23, 01:55 UTCJul 23, 03:35 UTC1h 40m
2026-07-22 UAL2323 ORD → MCO Jul 22, 23:10 UTCJul 22, 23:50 UTC40m
2026-07-22 UAL1022 DEN → SAT Jul 22, 20:10 UTCJul 22, 22:05 UTC1h 55m
2026-07-22 UAL2004 ORD → SFO Jul 22, 16:55 UTCJul 22, 17:55 UTC1h 0m
2026-07-22 UAL497 CVG → DEN Jul 22, 14:20 UTCJul 22, 15:25 UTC1h 5m
2026-07-22 UAL362 HNL → EWR Jul 22, 11:10 UTCJul 22, 12:10 UTC1h 0m
2026-07-21 UAL1422 SFO → MFR Jul 21, 23:50 UTCJul 22, 01:25 UTC1h 35m
2026-07-21 UAL1953 YYC → DEN Jul 21, 19:55 UTCJul 21, 21:50 UTC1h 55m
2026-07-21 UAL1832 CUN → IAH Jul 21, 13:25 UTCJul 21, 18:10 UTC4h 45m
2026-07-20 UAL2275 YYC → IAD Jul 20, 21:20 UTCJul 21, 00:55 UTC3h 34m
2026-07-20 UAL2459 DEN → YYC Jul 20, 17:45 UTCJul 20, 19:45 UTC2h 0m
2026-07-20 UAL2493 PDX → DEN Jul 20, 12:30 UTCJul 20, 15:40 UTC3h 10m
2026-07-20 UAL1534 EWR → FLL Jul 20, 00:15 UTCJul 20, 03:10 UTC2h 55m
2026-07-19 UAL1389 - Jul 19, 20:10 UTCJul 19, 22:40 UTC2h 30m
2026-07-19 UAL480 DFW → EWR Jul 19, 16:10 UTCJul 19, 18:30 UTC2h 20m
2026-07-19 UAL687 EWR → IAH Jul 19, 13:15 UTCJul 19, 13:45 UTC30m
2026-07-19 UAL687 EWR → IAH Jul 19, 13:17 UTCJul 19, 13:56 UTC39m
2026-07-19 UAL8141 - Jul 19, 02:15 UTCJul 19, 02:50 UTC35m
2026-07-19 UAL8141 DEN → DRO Jul 19, 02:25 UTCJul 19, 02:59 UTC34m
2026-07-18 UAL2757 - Jul 18, 21:55 UTCJul 19, 00:50 UTC2h 55m
2026-07-18 UAL1003 - Jul 18, 17:00 UTCJul 18, 19:50 UTC2h 50m
2026-07-18 UAL225 - Jul 18, 13:35 UTCJul 18, 15:15 UTC1h 40m
2026-07-18 UAL719J DEN → RNO Jul 18, 03:10 UTCJul 18, 05:00 UTC1h 50m
2026-07-17 UAL325 SEA → DEN Jul 17, 23:14 UTCJul 18, 01:30 UTC2h 15m
2026-07-17 UAL325 SEA → DEN Jul 17, 23:08 UTCJul 18, 01:28 UTC2h 20m
2026-07-17 UAL325 - Jul 17, 19:00 UTCJul 17, 21:10 UTC2h 10m
2026-07-17 UAL1896 SFO → LAX Jul 17, 16:12 UTCJul 17, 16:58 UTC46m
2026-07-17 UAL1896 - Jul 17, 16:10 UTCJul 17, 17:05 UTC55m
2026-07-17 UAL2647 - Jul 17, 13:29 UTCJul 17, 14:30 UTC1h 0m
2026-07-17 UAL2179 LGA → ORD Jul 17, 06:45 UTCJul 17, 07:40 UTC55m

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 N73278 page for operator, model, and routing details .

Mode-S A9D5E7 frequently asked

What is Mode-S code A9D5E7?
A9D5E7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N73278.
Where is Mode-S A9D5E7 registered?
Mode-S code A9D5E7 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 A9D5E7 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9D5E7, octal 52352747, decimal 11,130,343.
What flights does A9D5E7 operate?
Mode-S A9D5E7 has broadcast 20 distinct callsigns, including UAL325, UAL275, UAL1911, UAL685, UAL235.