sensors Mode-S transponder
A126C5
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N17302 · BOEING 737 MAX 8 · operated by UMB BANK NA TRUSTEE
- Hex
- A126C5
- Octal
- 50223305
- Decimal
- 10,561,221
- Country
- US
- Tail
- N17302
- Type
- B38M
- Flights observed
- 101
- Distinct callsigns
- 15
- Country
- US
- Last broadcast
- 10h ago
Last known position
Country allocation
The ICAO 24-bit address A126C5 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 15 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UAL183 | United Airlines | 19 | 2026-06-02 |
| UAL193 | United Airlines | 18 | 2026-05-22 |
| UAL184 | United Airlines | 17 | 2026-06-01 |
| UAL873 | United Airlines | 10 | 2026-05-31 |
| UAL192 | United Airlines | 8 | 2026-06-02 |
| UAL827 | United Airlines | 6 | 2026-05-30 |
| UAL158 | United Airlines | 4 | 2026-04-23 |
| UAL157 | United Airlines | 4 | 2026-04-23 |
| UAL136 | United Airlines | 4 | 2026-05-03 |
| UAL166 | United Airlines | 3 | 2026-05-16 |
| UAL151 | United Airlines | 3 | 2026-05-23 |
| UAL197 | United Airlines | 2 | 2026-05-13 |
| UAL3909 | United Airlines | 1 | 2026-04-15 |
| UAL165 | United Airlines | 1 | 2026-05-15 |
| UAL150 | United Airlines | 1 | 2026-05-23 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | UAL192 | ROR → GUM | Jun 2, 18:40 UTC | Jun 2, 19:00 UTC | 20m |
| 2026-06-02 | UAL192 | ROR → GUM | Jun 2, 15:15 UTC | Jun 2, 17:30 UTC | 2h 15m |
| 2026-06-02 | UAL192 | ROR → GUM | Jun 2, 15:20 UTC | Jun 2, 17:22 UTC | 2h 2m |
| 2026-06-02 | UAL183 | GUM → MNL | Jun 2, 10:14 UTC | Jun 2, 13:53 UTC | 3h 39m |
| 2026-06-01 | UAL184 | MNL → GUM | Jun 1, 15:10 UTC | Jun 2, 13:15 UTC | 22h 5m |
| 2026-06-01 | UAL183 | GUM → MNL | Jun 1, 09:29 UTC | Jun 1, 12:54 UTC | 3h 25m |
| 2026-06-01 | UAL183 | GUM → MNL | Jun 1, 02:20 UTC | Jun 1, 12:55 UTC | 10h 35m |
| 2026-05-31 | UAL873 | GUM → NRT | May 31, 09:40 UTC | May 31, 10:20 UTC | 40m |
| 2026-05-30 | UAL827 | NRT → GUM | May 30, 02:06 UTC | May 30, 02:40 UTC | 34m |
| 2026-05-29 | UAL873 | GUM → NRT | May 29, 09:50 UTC | May 29, 10:35 UTC | 45m |
| 2026-05-29 | UAL873 | GUM → NRT | May 29, 07:13 UTC | May 29, 10:30 UTC | 3h 17m |
| 2026-05-25 | UAL184 | MNL → GUM | May 25, 15:00 UTC | May 25, 15:35 UTC | 35m |
| 2026-05-25 | UAL183 | GUM → MNL | May 25, 09:29 UTC | May 25, 13:01 UTC | 3h 32m |
| 2026-05-25 | UAL183 | GUM → MNL | May 25, 02:15 UTC | May 25, 13:00 UTC | 10h 45m |
| 2026-05-24 | UAL873 | GUM → NRT | May 24, 07:13 UTC | May 24, 10:25 UTC | 3h 12m |
| 2026-05-23 | UAL184 | MNL → GUM | May 23, 14:55 UTC | May 23, 15:25 UTC | 30m |
| 2026-05-23 | UAL183 | GUM → MNL | May 23, 09:29 UTC | May 23, 12:56 UTC | 3h 27m |
| 2026-05-23 | UAL150 | KIX → GUM | May 23, 02:20 UTC | May 23, 02:40 UTC | 19m |
| 2026-05-23 | UAL151 | GUM → KIX | May 23, 00:35 UTC | May 23, 01:05 UTC | 30m |
| 2026-05-22 | UAL184 | MNL → GUM | May 22, 16:50 UTC | May 22, 17:20 UTC | 30m |
| 2026-05-22 | UAL193 | ROR → MNL | May 22, 13:00 UTC | May 22, 15:20 UTC | 2h 20m |
| 2026-05-22 | UAL193 | ROR → MNL | May 22, 12:58 UTC | May 22, 15:21 UTC | 2h 23m |
| 2026-05-22 | UAL193 | ROR → MNL | May 22, 10:50 UTC | May 22, 11:40 UTC | 50m |
| 2026-05-22 | UAL193 | ROR → MNL | May 22, 09:19 UTC | May 22, 11:31 UTC | 2h 12m |
| 2026-05-16 | UAL184 | MNL → GUM | May 16, 15:25 UTC | May 16, 15:50 UTC | 25m |
| 2026-05-16 | UAL183 | GUM → MNL | May 16, 12:21 UTC | May 16, 13:05 UTC | 45m |
| 2026-05-16 | UAL166 | FUK → GUM | May 16, 03:05 UTC | May 16, 03:20 UTC | 15m |
| 2026-05-16 | UAL166 | FUK → GUM | May 16, 03:17 UTC | May 16, 06:25 UTC | 3h 8m |
| 2026-05-15 | UAL165 | GUM → FUK | May 15, 21:43 UTC | May 16, 01:31 UTC | 3h 48m |
| 2026-05-15 | UAL192 | ROR → GUM | May 15, 18:15 UTC | May 15, 18:25 UTC | 10m |
| 2026-05-15 | UAL192 | ROR → GUM | May 15, 14:50 UTC | May 15, 17:00 UTC | 2h 10m |
| 2026-05-15 | UAL183 | GUM → MNL | May 15, 12:05 UTC | May 15, 12:45 UTC | 40m |
| 2026-05-14 | UAL183 | GUM → MNL | May 14, 15:20 UTC | May 15, 12:45 UTC | 21h 25m |
| 2026-05-14 | UAL184 | MNL → GUM | May 14, 14:45 UTC | May 15, 12:45 UTC | 22h 0m |
| 2026-05-14 | UAL183 | GUM → MNL | May 14, 12:10 UTC | May 14, 12:50 UTC | 40m |
| 2026-05-13 | UAL183 | GUM → MNL | May 13, 13:20 UTC | May 14, 12:50 UTC | 23h 30m |
| 2026-05-13 | UAL197 | NRT → GUM | May 13, 12:35 UTC | May 13, 13:20 UTC | 45m |
| 2026-05-13 | UAL197 | NRT → GUM | May 13, 12:32 UTC | May 13, 15:50 UTC | 3h 18m |
| 2026-05-13 | UAL873 | GUM → NRT | May 13, 02:15 UTC | May 13, 10:25 UTC | 8h 10m |
| 2026-05-12 | UAL873 | GUM → NRT | May 12, 07:08 UTC | May 12, 10:48 UTC | 3h 40m |
| 2026-05-12 | UAL827 | NRT → GUM | May 12, 02:45 UTC | May 12, 02:55 UTC | 10m |
| 2026-05-11 | UAL873 | GUM → NRT | May 11, 02:20 UTC | May 11, 10:35 UTC | 8h 15m |
| 2026-05-11 | UAL151 | GUM → KIX | May 11, 00:49 UTC | May 11, 01:05 UTC | 15m |
| 2026-05-10 | UAL151 | GUM → KIX | May 10, 21:18 UTC | May 11, 00:56 UTC | 3h 38m |
| 2026-05-10 | UAL184 | MNL → GUM | May 10, 14:50 UTC | May 10, 17:50 UTC | 3h 0m |
| 2026-05-10 | UAL184 | MNL → GUM | May 10, 14:40 UTC | May 10, 15:15 UTC | 35m |
| 2026-05-10 | UAL183 | GUM → MNL | May 10, 02:14 UTC | May 10, 13:10 UTC | 10h 55m |
| 2026-05-08 | UAL873 | GUM → NRT | May 8, 16:40 UTC | May 9, 10:20 UTC | 17h 40m |
| 2026-05-08 | UAL193 | ROR → MNL | May 8, 12:14 UTC | May 8, 14:35 UTC | 2h 20m |
| 2026-05-08 | UAL193 | ROR → MNL | May 8, 10:49 UTC | May 8, 11:14 UTC | 25m |
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 N17302 page for operator, model, and routing details .