sensors Mode-S transponder
AA92F8
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N78001 · BOEING 777-200 · operated by UNITED AIRLINES INC
- Hex
- AA92F8
- Octal
- 52511370
- Decimal
- 11,178,744
- Country
- US
- Tail
- N78001
- Type
- B772
- Flights observed
- 96
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 5h ago
Last known position
Country allocation
The ICAO 24-bit address AA92F8 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 |
|---|---|---|---|
| UAL97 | United Airlines | 8 | 2026-05-27 |
| UAL969 | United Airlines | 8 | 2026-05-07 |
| UAL949 | United Airlines | 7 | 2026-04-14 |
| UAL968 | United Airlines | 6 | 2026-05-06 |
| UAL889 | United Airlines | 6 | 2026-04-20 |
| UAL96 | United Airlines | 5 | 2026-05-26 |
| UAL927 | United Airlines | 5 | 2026-05-25 |
| UAL926 | United Airlines | 5 | 2026-05-25 |
| UAL888 | United Airlines | 5 | 2026-04-19 |
| UAL506 | United Airlines | 3 | 2026-05-29 |
| UAL3935 | United Airlines | 3 | 2026-05-09 |
| UAL3931 | United Airlines | 3 | 2026-05-24 |
| UAL948 | United Airlines | 2 | 2026-04-14 |
| UAL901 | United Airlines | 2 | 2026-04-28 |
| UAL804 | United Airlines | 2 | 2026-04-23 |
| UAL57 | United Airlines | 2 | 2026-05-01 |
| UAL194 | United Airlines | 2 | 2026-05-02 |
| UAL19 | United Airlines | 2 | 2026-04-30 |
| UAL131 | United Airlines | 2 | 2026-04-26 |
| UAL130 | United Airlines | 2 | 2026-04-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | UAL916 | AKL → SFO | May 30, 02:15 UTC | May 30, 02:45 UTC | 30m |
| 2026-05-29 | UAL917 | SFO → AKL | May 29, 07:10 UTC | May 29, 19:15 UTC | 12h 5m |
| 2026-05-29 | UAL506 | MSN → DEN | May 29, 02:55 UTC | May 29, 03:00 UTC | 5m |
| 2026-05-28 | UAL506 | MSN → DEN | May 28, 14:15 UTC | May 29, 00:00 UTC | 9h 45m |
| 2026-05-28 | UAL506 | MSN → DEN | May 28, 14:07 UTC | May 29, 02:38 UTC | 12h 31m |
| 2026-05-28 | UAL507 | DEN → LGA | May 28, 00:25 UTC | May 28, 11:45 UTC | 11h 20m |
| 2026-05-27 | UAL97 | BNE → SFO | May 27, 01:49 UTC | May 27, 02:19 UTC | 30m |
| 2026-05-27 | UAL97 | BNE → SFO | May 27, 01:43 UTC | May 27, 14:18 UTC | 12h 35m |
| 2026-05-27 | UAL97 | BNE → SFO | May 27, 01:43 UTC | May 27, 14:22 UTC | 12h 39m |
| 2026-05-26 | UAL96 | SFO → BNE | May 26, 06:49 UTC | May 26, 19:55 UTC | 13h 5m |
| 2026-05-25 | UAL927 | FRA → SFO | May 25, 15:50 UTC | May 26, 03:00 UTC | 11h 10m |
| 2026-05-25 | UAL926 | SFO → FRA | May 25, 02:30 UTC | May 25, 12:40 UTC | 10h 10m |
| 2026-05-24 | UAL3931 | EWR → CLE | May 24, 12:55 UTC | May 24, 13:30 UTC | 35m |
| 2026-05-24 | UAL3931 | EWR → CLE | May 24, 12:40 UTC | May 24, 21:40 UTC | 9h 0m |
| 2026-05-24 | UAL3931 | EWR → CLE | May 24, 06:55 UTC | May 24, 10:45 UTC | 3h 50m |
| 2026-05-09 | UAL3935 | LHR → LAX | May 9, 05:40 UTC | May 9, 06:00 UTC | 20m |
| 2026-05-08 | UAL3935 | LHR → LAX | May 8, 15:24 UTC | May 9, 05:59 UTC | 14h 35m |
| 2026-05-08 | UAL3935 | LHR → LAX | May 8, 15:30 UTC | May 9, 05:10 UTC | 13h 40m |
| 2026-05-07 | UAL969 | AMS → SFO | May 7, 13:20 UTC | May 7, 14:00 UTC | 40m |
| 2026-05-07 | UAL969 | AMS → SFO | May 7, 13:16 UTC | May 7, 23:36 UTC | 10h 20m |
| 2026-05-06 | UAL968 | SFO → AMS | May 6, 22:28 UTC | May 7, 08:38 UTC | 10h 10m |
| 2026-05-06 | UAL968 | SFO → AMS | May 6, 22:35 UTC | May 7, 08:00 UTC | 9h 25m |
| 2026-05-05 | UAL195 | MUC → SFO | May 5, 10:00 UTC | May 5, 21:10 UTC | 11h 10m |
| 2026-05-04 | UAL102 | IAH → MUC | May 4, 22:15 UTC | May 5, 07:55 UTC | 9h 40m |
| 2026-05-03 | UAL160 | MUC → IAH | May 3, 10:50 UTC | May 3, 21:20 UTC | 10h 30m |
| 2026-05-02 | UAL194 | SFO → MUC | May 2, 21:12 UTC | May 3, 07:55 UTC | 10h 43m |
| 2026-05-02 | UAL194 | SFO → MUC | May 2, 21:05 UTC | May 3, 08:00 UTC | 10h 54m |
| 2026-05-02 | UAL984 | CDG → SFO | May 2, 07:25 UTC | May 2, 18:15 UTC | 10h 50m |
| 2026-05-01 | UAL57 | EWR → CDG | May 1, 22:08 UTC | May 2, 05:03 UTC | 6h 55m |
| 2026-05-01 | UAL57 | EWR → CDG | May 1, 22:10 UTC | May 2, 05:05 UTC | 6h 55m |
| 2026-05-01 | UAL18 | MXP → EWR | May 1, 08:05 UTC | May 1, 15:50 UTC | 7h 45m |
| 2026-04-30 | UAL19 | EWR → MXP | Apr 30, 21:48 UTC | May 1, 05:17 UTC | 7h 29m |
| 2026-04-30 | UAL19 | EWR → MXP | Apr 30, 21:55 UTC | May 1, 05:25 UTC | 7h 30m |
| 2026-04-30 | UAL1726 | ORD → ALB | Apr 30, 06:25 UTC | Apr 30, 11:00 UTC | 4h 35m |
| 2026-04-29 | UAL900 | LHR → SFO | Apr 29, 10:05 UTC | Apr 29, 20:20 UTC | 10h 15m |
| 2026-04-29 | UAL930 | SFO → LHR | Apr 29, 02:59 UTC | Apr 29, 12:43 UTC | 9h 44m |
| 2026-04-28 | UAL901 | SFO → LHR | Apr 28, 20:27 UTC | Apr 29, 06:11 UTC | 9h 44m |
| 2026-04-28 | UAL901 | SFO → LHR | Apr 28, 20:25 UTC | Apr 29, 06:19 UTC | 9h 55m |
| 2026-04-28 | UAL838 | NRT → SFO | Apr 28, 08:25 UTC | Apr 28, 17:30 UTC | 9h 5m |
| 2026-04-27 | UAL837 | SFO → NRT | Apr 27, 19:10 UTC | Apr 28, 05:50 UTC | 10h 40m |
| 2026-04-27 | UAL876 | HND → SFO | Apr 27, 07:20 UTC | Apr 27, 16:15 UTC | 8h 55m |
| 2026-04-26 | UAL131 | EWR → HND | Apr 26, 14:28 UTC | Apr 27, 03:52 UTC | 13h 24m |
| 2026-04-26 | UAL131 | EWR → HND | Apr 26, 14:15 UTC | Apr 27, 03:55 UTC | 13h 40m |
| 2026-04-25 | UAL130 | HND → EWR | Apr 25, 09:10 UTC | Apr 25, 21:51 UTC | 12h 41m |
| 2026-04-25 | UAL130 | HND → EWR | Apr 25, 09:35 UTC | Apr 25, 18:00 UTC | 8h 25m |
| 2026-04-24 | UAL803 | IAD → HND | Apr 24, 16:40 UTC | Apr 25, 06:00 UTC | 13h 20m |
| 2026-04-23 | UAL804 | HND → IAD | Apr 23, 07:10 UTC | Apr 23, 19:03 UTC | 11h 53m |
| 2026-04-23 | UAL804 | HND → IAD | Apr 23, 07:05 UTC | Apr 23, 19:00 UTC | 11h 54m |
| 2026-04-22 | UAL875 | SFO → HND | Apr 22, 17:50 UTC | Apr 23, 04:30 UTC | 10h 40m |
| 2026-04-22 | UAL97 | BNE → SFO | Apr 22, 01:00 UTC | Apr 22, 09:30 UTC | 8h 30m |
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 N78001 page for operator, model, and routing details .