sensors Mode-S transponder
AA92FF
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N78008 · BOEING 777-200 · operated by UNITED AIRLINES INC
- Hex
- AA92FF
- Octal
- 52511377
- Decimal
- 11,178,751
- Country
- US
- Tail
- N78008
- Type
- B772
- Flights observed
- 128
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 47m ago
Last known position
Country allocation
The ICAO 24-bit address AA92FF 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 |
|---|---|---|---|
| UAL919 | United Airlines | 13 | 2026-05-13 |
| UAL918 | United Airlines | 13 | 2026-05-12 |
| UAL880 | United Airlines | 7 | 2026-05-07 |
| UAL879 | United Airlines | 7 | 2026-04-15 |
| UAL852 | United Airlines | 7 | 2026-05-27 |
| UAL927 | United Airlines | 6 | 2026-05-29 |
| UAL853 | United Airlines | 6 | 2026-05-26 |
| UAL44 | United Airlines | 6 | 2026-05-27 |
| UAL819 | United Airlines | 5 | 2026-05-06 |
| UAL47 | United Airlines | 5 | 2026-05-03 |
| UAL45 | United Airlines | 5 | 2026-05-28 |
| UAL4 | United Airlines | 5 | 2026-05-05 |
| UAL932 | United Airlines | 4 | 2026-05-15 |
| UAL5 | United Airlines | 4 | 2026-05-05 |
| UAL943 | United Airlines | 3 | 2026-04-27 |
| UAL926 | United Airlines | 3 | 2026-05-29 |
| UAL818 | United Airlines | 3 | 2026-05-07 |
| UAL942 | United Airlines | 2 | 2026-04-27 |
| UAL933 | United Airlines | 2 | 2026-05-14 |
| UAL885 | United Airlines | 2 | 2026-05-11 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | UAL888 | SFO → PEK | May 30, 18:30 UTC | May 30, 19:40 UTC | 1h 10m |
| 2026-05-29 | UAL927 | FRA → SFO | May 29, 16:10 UTC | May 30, 03:15 UTC | 11h 5m |
| 2026-05-29 | UAL926 | SFO → FRA | May 29, 02:59 UTC | May 29, 13:25 UTC | 10h 26m |
| 2026-05-29 | UAL926 | SFO → FRA | May 29, 02:50 UTC | May 29, 05:40 UTC | 2h 50m |
| 2026-05-28 | UAL45 | ZRH → SFO | May 28, 12:10 UTC | May 28, 23:35 UTC | 11h 25m |
| 2026-05-27 | UAL44 | SFO → ZRH | May 27, 21:58 UTC | May 28, 08:36 UTC | 10h 38m |
| 2026-05-27 | UAL44 | SFO → ZRH | May 27, 21:55 UTC | May 28, 08:45 UTC | 10h 50m |
| 2026-05-27 | UAL852 | TPE → SAN | May 27, 06:51 UTC | May 27, 18:05 UTC | 11h 14m |
| 2026-05-27 | UAL852 | TPE → SAN | May 27, 06:51 UTC | May 27, 18:05 UTC | 11h 14m |
| 2026-05-27 | UAL852 | TPE → SAN | May 27, 06:44 UTC | May 27, 18:15 UTC | 11h 31m |
| 2026-05-26 | UAL853 | SFO → TPE | May 26, 07:26 UTC | May 26, 20:10 UTC | 12h 44m |
| 2026-05-26 | UAL853 | SFO → TPE | May 26, 07:24 UTC | May 26, 19:45 UTC | 12h 20m |
| 2026-05-25 | UAL45 | ZRH → SFO | May 25, 12:02 UTC | May 25, 23:16 UTC | 11h 14m |
| 2026-05-25 | UAL45 | ZRH → SFO | May 25, 12:00 UTC | May 25, 15:20 UTC | 3h 20m |
| 2026-05-24 | UAL44 | SFO → ZRH | May 24, 23:00 UTC | May 25, 08:10 UTC | 9h 10m |
| 2026-05-24 | UAL44 | SFO → ZRH | May 24, 21:48 UTC | May 25, 08:07 UTC | 10h 19m |
| 2026-05-24 | UAL852 | TPE → SAN | May 24, 06:35 UTC | May 24, 18:00 UTC | 11h 25m |
| 2026-05-23 | UAL853 | SFO → TPE | May 23, 07:39 UTC | May 23, 20:24 UTC | 12h 45m |
| 2026-05-23 | UAL853 | SFO → TPE | May 23, 07:45 UTC | May 23, 08:15 UTC | 30m |
| 2026-05-22 | UAL673 | SFO → BOS | May 22, 15:15 UTC | May 23, 02:20 UTC | 11h 5m |
| 2026-05-22 | UAL672 | EWR → ATL | May 22, 01:45 UTC | May 22, 12:55 UTC | 11h 10m |
| 2026-05-21 | UAL949 | LHR → SFO | May 21, 12:30 UTC | May 21, 22:30 UTC | 10h 0m |
| 2026-05-21 | UAL948 | SFO → LHR | May 21, 00:25 UTC | May 21, 10:20 UTC | 9h 55m |
| 2026-05-19 | UAL927 | FRA → SFO | May 19, 16:05 UTC | May 19, 17:40 UTC | 1h 35m |
| 2026-05-19 | UAL927 | FRA → SFO | May 19, 15:51 UTC | May 20, 02:23 UTC | 10h 32m |
| 2026-05-19 | UAL927 | FRA → SFO | May 19, 15:51 UTC | May 20, 02:27 UTC | 10h 36m |
| 2026-05-19 | UAL926 | SFO → FRA | May 19, 02:45 UTC | May 19, 13:15 UTC | 10h 30m |
| 2026-05-18 | UAL45 | ZRH → SFO | May 18, 12:35 UTC | May 18, 23:35 UTC | 11h 0m |
| 2026-05-18 | UAL45 | ZRH → SFO | May 18, 12:50 UTC | May 18, 23:40 UTC | 10h 49m |
| 2026-05-17 | UAL44 | SFO → ZRH | May 17, 20:42 UTC | May 18, 07:15 UTC | 10h 33m |
| 2026-05-17 | UAL44 | SFO → ZRH | May 17, 20:50 UTC | May 18, 07:15 UTC | 10h 25m |
| 2026-05-17 | UAL852 | TPE → SAN | May 17, 08:45 UTC | May 17, 17:55 UTC | 9h 10m |
| 2026-05-17 | UAL852 | TPE → SAN | May 17, 06:50 UTC | May 17, 07:00 UTC | 10m |
| 2026-05-17 | UAL852 | TPE → SAN | May 17, 06:51 UTC | May 17, 17:48 UTC | 10h 57m |
| 2026-05-16 | UAL853 | SFO → TPE | May 16, 19:45 UTC | May 16, 20:05 UTC | 20m |
| 2026-05-16 | UAL853 | SFO → TPE | May 16, 07:11 UTC | May 16, 18:35 UTC | 11h 25m |
| 2026-05-15 | UAL927 | FRA → SFO | May 15, 16:00 UTC | May 15, 17:45 UTC | 1h 45m |
| 2026-05-15 | UAL927 | FRA → SFO | May 15, 15:51 UTC | May 16, 02:52 UTC | 11h 1m |
| 2026-05-15 | UAL932 | IAD → FRA | May 15, 02:34 UTC | May 15, 09:45 UTC | 7h 11m |
| 2026-05-15 | UAL932 | IAD → FRA | May 15, 02:45 UTC | May 15, 09:55 UTC | 7h 10m |
| 2026-05-14 | UAL933 | FRA → IAD | May 14, 15:40 UTC | May 14, 17:40 UTC | 2h 0m |
| 2026-05-14 | UAL933 | FRA → IAD | May 14, 15:31 UTC | May 14, 23:54 UTC | 8h 23m |
| 2026-05-14 | UAL932 | IAD → FRA | May 14, 03:25 UTC | May 14, 11:01 UTC | 7h 35m |
| 2026-05-13 | UAL919 | LHR → IAD | May 13, 12:50 UTC | May 13, 20:20 UTC | 7h 30m |
| 2026-05-12 | UAL918 | IAD → LHR | May 12, 23:10 UTC | May 13, 05:55 UTC | 6h 45m |
| 2026-05-12 | UAL918 | IAD → LHR | May 12, 23:10 UTC | May 13, 06:05 UTC | 6h 55m |
| 2026-05-11 | UAL885 | FCO → IAD | May 11, 16:30 UTC | May 11, 18:50 UTC | 2h 21m |
| 2026-05-11 | UAL884 | IAD → FCO | May 11, 00:10 UTC | May 11, 08:05 UTC | 7h 55m |
| 2026-05-08 | UAL919 | LHR → IAD | May 8, 11:44 UTC | May 8, 12:49 UTC | 1h 5m |
| 2026-05-08 | UAL919 | LHR → IAD | May 8, 11:40 UTC | May 8, 19:25 UTC | 7h 45m |
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 N78008 page for operator, model, and routing details .