sensors Mode-S transponder
A2A38E
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N26952 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC
- Hex
- A2A38E
- Octal
- 50521616
- Decimal
- 10,658,702
- Country
- US
- Tail
- N26952
- Type
- B789
- Flights observed
- 223
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 26, 17:05 UTC
Last known position
Country allocation
The ICAO 24-bit address A2A38E 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 |
|---|---|---|---|
| UAL62 | United Airlines | 11 | 2026-07-23 |
| UAL63 | United Airlines | 9 | 2026-07-24 |
| UAL806 | - | 8 | 2026-07-08 |
| UAL7 | United Airlines | 8 | 2026-05-11 |
| UAL893 | - | 7 | 2026-07-12 |
| UAL892 | - | 7 | 2026-07-13 |
| UAL805 | - | 7 | 2026-07-07 |
| UAL842 | - | 6 | 2026-07-18 |
| UAL6 | - | 6 | 2026-07-19 |
| UAL968 | - | 5 | 2026-07-13 |
| UAL923 | - | 5 | 2026-06-28 |
| UAL1757 | - | 5 | 2026-07-16 |
| UAL969 | - | 4 | 2026-07-14 |
| UAL939 | United Airlines | 4 | 2026-06-04 |
| UAL870 | - | 4 | 2026-06-23 |
| UAL863 | United Airlines | 4 | 2026-07-17 |
| UAL820 | United Airlines | 4 | 2026-05-15 |
| UAL33 | United Airlines | 4 | 2026-05-27 |
| UAL32 | United Airlines | 4 | 2026-07-18 |
| UAL27 | United Airlines | 4 | 2026-04-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | UAL3932 | EWR → IAD | Jul 26, 14:30 UTC | Jul 26, 17:05 UTC | 2h 35m |
| 2026-07-26 | UAL3932 | EWR → IAD | Jul 26, 14:23 UTC | Jul 26, 17:07 UTC | 2h 44m |
| 2026-07-24 | UAL63 | GRU → IAH | Jul 24, 01:10 UTC | Jul 24, 10:40 UTC | 9h 30m |
| 2026-07-24 | UAL63 | GRU → IAH | Jul 24, 01:11 UTC | Jul 24, 10:37 UTC | 9h 26m |
| 2026-07-23 | UAL62 | IAH → GRU | Jul 23, 00:55 UTC | Jul 23, 10:10 UTC | 9h 15m |
| 2026-07-23 | UAL62 | IAH → GRU | Jul 23, 00:53 UTC | Jul 23, 10:03 UTC | 9h 10m |
| 2026-07-21 | UAL63 | GRU → IAH | Jul 21, 00:55 UTC | Jul 21, 10:00 UTC | 9h 5m |
| 2026-07-20 | UAL62 | IAH → GRU | Jul 20, 00:05 UTC | Jul 20, 09:15 UTC | 9h 10m |
| 2026-07-19 | UAL6 | - | Jul 19, 08:15 UTC | Jul 19, 08:50 UTC | 35m |
| 2026-07-19 | UAL6 | NRT → IAH | Jul 19, 08:26 UTC | Jul 19, 19:49 UTC | 11h 23m |
| 2026-07-18 | UAL32 | LAX → NRT | Jul 18, 18:50 UTC | Jul 19, 04:55 UTC | 10h 5m |
| 2026-07-18 | UAL842 | - | Jul 18, 00:00 UTC | Jul 18, 00:29 UTC | 30m |
| 2026-07-17 | UAL842 | SYD → LAX | Jul 17, 23:51 UTC | Jul 18, 13:29 UTC | 13h 38m |
| 2026-07-17 | UAL863 | SFO → SYD | Jul 17, 07:30 UTC | Jul 17, 21:15 UTC | 13h 45m |
| 2026-07-16 | UAL1757 | SFO → RNO | Jul 16, 23:23 UTC | Jul 17, 04:03 UTC | 4h 40m |
| 2026-07-16 | UAL1757 | - | Jul 16, 23:25 UTC | Jul 17, 04:04 UTC | 4h 40m |
| 2026-07-16 | UAL991 | BCN → IAD | Jul 16, 09:25 UTC | Jul 16, 17:45 UTC | 8h 20m |
| 2026-07-15 | UAL992 | IAD → BCN | Jul 15, 22:50 UTC | Jul 16, 06:10 UTC | 7h 20m |
| 2026-07-15 | UAL1849 | SFO → IAD | Jul 15, 15:40 UTC | Jul 15, 20:20 UTC | 4h 40m |
| 2026-07-14 | UAL969 | - | Jul 14, 13:35 UTC | Jul 15, 00:10 UTC | 10h 34m |
| 2026-07-13 | UAL968 | SFO → AMS | Jul 13, 22:53 UTC | Jul 14, 08:15 UTC | 9h 22m |
| 2026-07-13 | UAL968 | - | Jul 13, 22:40 UTC | Jul 14, 02:25 UTC | 3h 45m |
| 2026-07-13 | UAL892 | ICN → SFO | Jul 13, 08:16 UTC | Jul 13, 18:42 UTC | 10h 26m |
| 2026-07-13 | UAL892 | - | Jul 13, 08:10 UTC | Jul 13, 09:30 UTC | 1h 20m |
| 2026-07-12 | UAL893 | SFO → ICN | Jul 12, 18:20 UTC | Jul 13, 05:35 UTC | 11h 15m |
| 2026-07-12 | UAL61 | MEL → SFO | Jul 12, 01:09 UTC | Jul 12, 14:40 UTC | 13h 31m |
| 2026-07-12 | UAL61 | MEL → SFO | Jul 12, 01:10 UTC | Jul 12, 14:45 UTC | 13h 35m |
| 2026-07-11 | UAL60 | SFO → MEL | Jul 11, 07:15 UTC | Jul 11, 22:20 UTC | 15h 5m |
| 2026-07-10 | UAL1757 | - | Jul 10, 22:40 UTC | Jul 11, 03:40 UTC | 5h 0m |
| 2026-07-10 | UAL1849 | SFO → IAD | Jul 10, 15:50 UTC | Jul 10, 20:10 UTC | 4h 20m |
| 2026-07-09 | UAL969 | - | Jul 9, 13:15 UTC | Jul 9, 23:45 UTC | 10h 30m |
| 2026-07-08 | UAL968 | SFO → AMS | Jul 8, 22:50 UTC | Jul 9, 08:35 UTC | 9h 45m |
| 2026-07-08 | UAL806 | ICN → SFO | Jul 8, 04:21 UTC | Jul 8, 13:34 UTC | 9h 13m |
| 2026-07-08 | UAL806 | - | Jul 8, 03:30 UTC | Jul 8, 03:55 UTC | 25m |
| 2026-07-07 | UAL805 | SFO → ICN | Jul 7, 07:41 UTC | Jul 7, 19:01 UTC | 11h 20m |
| 2026-07-07 | UAL805 | SFO → ICN | Jul 7, 07:40 UTC | Jul 7, 19:20 UTC | 11h 40m |
| 2026-07-06 | UAL969 | AMS → SFO | Jul 6, 13:16 UTC | Jul 6, 23:54 UTC | 10h 38m |
| 2026-07-06 | UAL969 | - | Jul 6, 13:10 UTC | Jul 6, 23:55 UTC | 10h 45m |
| 2026-07-05 | UAL968 | SFO → AMS | Jul 5, 22:23 UTC | Jul 6, 07:47 UTC | 9h 24m |
| 2026-07-05 | UAL968 | - | Jul 5, 22:20 UTC | Jul 6, 07:55 UTC | 9h 35m |
| 2026-07-05 | UAL892 | - | Jul 5, 08:20 UTC | Jul 5, 18:30 UTC | 10h 10m |
| 2026-07-05 | UAL892 | ICN → SFO | Jul 5, 08:16 UTC | Jul 5, 18:27 UTC | 10h 11m |
| 2026-07-04 | UAL893 | SFO → ICN | Jul 4, 18:20 UTC | Jul 5, 05:55 UTC | 11h 35m |
| 2026-07-04 | UAL114 | - | Jul 4, 07:15 UTC | Jul 4, 14:55 UTC | 7h 40m |
| 2026-07-03 | UAL115 | SFO → PPT | Jul 3, 20:45 UTC | Jul 4, 04:40 UTC | 7h 55m |
| 2026-07-03 | UAL28D | SIN → SFO | Jul 3, 03:20 UTC | Jul 3, 16:15 UTC | 12h 55m |
| 2026-07-02 | UAL29D | SFO → SIN | Jul 2, 07:24 UTC | Jul 2, 22:43 UTC | 15h 19m |
| 2026-07-02 | UAL29D | - | Jul 2, 07:15 UTC | Jul 2, 21:10 UTC | 13h 55m |
| 2026-07-01 | UAL949 | - | Jul 1, 12:40 UTC | Jul 1, 22:40 UTC | 10h 0m |
| 2026-07-01 | UAL948 | SFO → LHR | Jul 1, 00:29 UTC | Jul 1, 09:56 UTC | 9h 27m |
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 N26952 page for operator, model, and routing details .