sensors Mode-S transponder
AAC136
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N792UA · BOEING 777-200 · operated by UNITED AIRLINES INC
- Hex
- AAC136
- Octal
- 52540466
- Decimal
- 11,190,582
- Country
- US
- Tail
- N792UA
- Type
- B772
- Flights observed
- 225
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 3h ago
Last known position
Country allocation
The ICAO 24-bit address AAC136 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 |
|---|---|---|---|
| UAL56 | United Airlines | 10 | 2026-06-08 |
| UAL194 | - | 10 | 2026-07-12 |
| UAL59 | - | 9 | 2026-06-26 |
| UAL160 | - | 9 | 2026-07-13 |
| UAL915 | United Airlines | 8 | 2026-06-07 |
| UAL19 | United Airlines | 8 | 2026-05-09 |
| UAL58 | - | 7 | 2026-06-25 |
| UAL943 | United Airlines | 6 | 2026-06-19 |
| UAL933 | United Airlines | 6 | 2026-06-03 |
| UAL880 | - | 6 | 2026-07-09 |
| UAL2328 | United Airlines | 6 | 2026-04-25 |
| UAL18 | United Airlines | 6 | 2026-05-09 |
| UAL942 | - | 5 | 2026-06-19 |
| UAL926 | United Airlines | 5 | 2026-06-03 |
| UAL879 | United Airlines | 5 | 2026-05-23 |
| UAL852 | United Airlines | 5 | 2026-05-20 |
| UAL698 | United Airlines | 5 | 2026-04-27 |
| UAL35 | United Airlines | 5 | 2026-05-31 |
| UAL948 | - | 4 | 2026-06-18 |
| UAL853 | United Airlines | 4 | 2026-05-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | UAL5 | - | Jul 14, 02:20 UTC | Jul 14, 06:30 UTC | 4h 10m |
| 2026-07-13 | UAL160 | - | Jul 13, 22:55 UTC | Jul 13, 23:55 UTC | 1h 0m |
| 2026-07-13 | UAL160 | MUC → AUS | Jul 13, 10:45 UTC | Jul 13, 21:30 UTC | 10h 45m |
| 2026-07-12 | UAL194 | SFO → MUC | Jul 12, 21:25 UTC | Jul 13, 07:45 UTC | 10h 20m |
| 2026-07-12 | UAL984 | CDG → SFO | Jul 12, 07:39 UTC | Jul 12, 18:12 UTC | 10h 33m |
| 2026-07-12 | UAL984 | - | Jul 12, 07:20 UTC | Jul 12, 09:00 UTC | 1h 40m |
| 2026-07-11 | UAL57 | EWR → CDG | Jul 11, 22:15 UTC | Jul 12, 04:40 UTC | 6h 25m |
| 2026-07-11 | UAL31 | MUC → EWR | Jul 11, 08:05 UTC | Jul 11, 16:20 UTC | 8h 15m |
| 2026-07-11 | UAL31 | MUC → EWR | Jul 11, 08:07 UTC | Jul 11, 16:17 UTC | 8h 10m |
| 2026-07-10 | UAL30 | EWR → MUC | Jul 10, 21:48 UTC | Jul 11, 04:29 UTC | 6h 41m |
| 2026-07-10 | UAL30 | - | Jul 10, 21:35 UTC | Jul 10, 22:55 UTC | 1h 20m |
| 2026-07-10 | UAL905 | LHR → EWR | Jul 10, 09:30 UTC | Jul 10, 16:50 UTC | 7h 20m |
| 2026-07-10 | UAL905 | LHR → EWR | Jul 10, 09:05 UTC | Jul 10, 16:53 UTC | 7h 48m |
| 2026-07-09 | UAL880 | - | Jul 9, 22:05 UTC | Jul 10, 01:15 UTC | 3h 10m |
| 2026-07-09 | UAL880 | IAH → LHR | Jul 9, 21:52 UTC | Jul 10, 06:36 UTC | 8h 44m |
| 2026-07-09 | UAL818 | - | Jul 9, 00:15 UTC | Jul 9, 10:00 UTC | 9h 45m |
| 2026-07-08 | UAL819 | - | Jul 8, 03:00 UTC | Jul 8, 11:30 UTC | 8h 30m |
| 2026-07-08 | UAL819 | IAH → EZE | Jul 8, 01:54 UTC | Jul 8, 12:18 UTC | 10h 24m |
| 2026-07-07 | UAL47 | FRA → IAH | Jul 7, 12:26 UTC | Jul 7, 22:53 UTC | 10h 27m |
| 2026-07-07 | UAL47 | - | Jul 7, 12:40 UTC | Jul 7, 23:00 UTC | 10h 20m |
| 2026-07-07 | UAL46 | - | Jul 7, 00:45 UTC | Jul 7, 10:10 UTC | 9h 25m |
| 2026-07-06 | UAL160 | - | Jul 6, 10:50 UTC | Jul 6, 21:50 UTC | 11h 0m |
| 2026-07-05 | UAL194 | SFO → MUC | Jul 5, 21:48 UTC | Jul 6, 07:57 UTC | 10h 9m |
| 2026-07-05 | UAL194 | - | Jul 5, 21:45 UTC | Jul 6, 08:00 UTC | 10h 15m |
| 2026-07-04 | UAL45 | - | Jul 4, 12:35 UTC | Jul 5, 00:10 UTC | 11h 35m |
| 2026-07-03 | UAL44 | SFO → ZRH | Jul 3, 21:55 UTC | Jul 4, 08:15 UTC | 10h 20m |
| 2026-06-30 | UAL1593 | EWR → SFO | Jun 30, 13:49 UTC | Jun 30, 18:50 UTC | 5h 1m |
| 2026-06-30 | UAL1593 | - | Jun 30, 13:45 UTC | Jun 30, 19:00 UTC | 5h 15m |
| 2026-06-30 | UAL46 | - | Jun 30, 00:09 UTC | Jun 30, 04:00 UTC | 3h 51m |
| 2026-06-28 | UAL160 | - | Jun 28, 10:44 UTC | Jun 28, 21:04 UTC | 10h 20m |
| 2026-06-27 | UAL194 | SFO → MUC | Jun 27, 21:58 UTC | Jun 28, 08:31 UTC | 10h 33m |
| 2026-06-27 | UAL194 | - | Jun 27, 21:55 UTC | Jun 27, 23:29 UTC | 1h 35m |
| 2026-06-26 | UAL59 | - | Jun 26, 12:00 UTC | Jun 26, 22:49 UTC | 10h 50m |
| 2026-06-26 | UAL59 | FRA → SFO | Jun 26, 11:44 UTC | Jun 26, 22:43 UTC | 10h 59m |
| 2026-06-25 | UAL58 | SFO → FRA | Jun 25, 22:54 UTC | Jun 26, 09:10 UTC | 10h 15m |
| 2026-06-25 | UAL876 | - | Jun 25, 07:05 UTC | Jun 25, 15:40 UTC | 8h 35m |
| 2026-06-24 | UAL131 | EWR → HND | Jun 24, 14:39 UTC | Jun 25, 04:10 UTC | 13h 30m |
| 2026-06-22 | UAL55 | - | Jun 22, 11:30 UTC | Jun 22, 19:14 UTC | 7h 45m |
| 2026-06-22 | UAL55 | CDG → EWR | Jun 22, 11:34 UTC | Jun 22, 19:11 UTC | 7h 37m |
| 2026-06-22 | UAL54 | EWR → CDG | Jun 22, 02:04 UTC | Jun 22, 08:35 UTC | 6h 30m |
| 2026-06-21 | UAL130 | HND → EWR | Jun 21, 09:59 UTC | Jun 21, 22:24 UTC | 12h 25m |
| 2026-06-20 | UAL803 | IAD → HND | Jun 20, 17:24 UTC | Jun 21, 06:14 UTC | 12h 50m |
| 2026-06-19 | UAL943 | LIS → IAD | Jun 19, 16:29 UTC | Jun 20, 00:14 UTC | 7h 45m |
| 2026-06-19 | UAL942 | IAD → LIS | Jun 19, 07:59 UTC | Jun 19, 14:09 UTC | 6h 10m |
| 2026-06-19 | UAL942 | IAD → LIS | Jun 19, 07:28 UTC | Jun 19, 13:59 UTC | 6h 31m |
| 2026-06-18 | UAL925 | - | Jun 18, 15:55 UTC | Jun 18, 23:20 UTC | 7h 25m |
| 2026-06-18 | UAL948 | - | Jun 18, 02:20 UTC | Jun 18, 05:20 UTC | 3h 0m |
| 2026-06-18 | UAL948 | SFO → LHR | Jun 18, 02:14 UTC | Jun 18, 12:02 UTC | 9h 48m |
| 2026-06-15 | UAL969 | - | Jun 15, 13:20 UTC | Jun 15, 23:15 UTC | 9h 55m |
| 2026-06-14 | UAL968 | SFO → AMS | Jun 14, 22:38 UTC | Jun 15, 08:29 UTC | 9h 51m |
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 N792UA page for operator, model, and routing details .