sensors Mode-S transponder
A13DE2
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N17963 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC
- Hex
- A13DE2
- Octal
- 50236742
- Decimal
- 10,567,138
- Country
- US
- Tail
- N17963
- Type
- B789
- Flights observed
- 93
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 1h ago
Current position
Country allocation
The ICAO 24-bit address A13DE2 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 |
|---|---|---|---|
| UAL820 | United Airlines | 6 | 2026-05-30 |
| UAL1757 | United Airlines | 5 | 2026-04-18 |
| UAL62 | United Airlines | 4 | 2026-05-20 |
| UAL2023 | United Airlines | 4 | 2026-04-21 |
| UAL187 | United Airlines | 4 | 2026-05-27 |
| UAL1849 | United Airlines | 4 | 2026-04-20 |
| UAL893 | United Airlines | 3 | 2026-04-16 |
| UAL892 | United Airlines | 3 | 2026-04-16 |
| UAL821 | United Airlines | 3 | 2026-05-14 |
| UAL79 | United Airlines | 3 | 2026-05-18 |
| UAL772 | United Airlines | 3 | 2026-04-30 |
| UAL63 | United Airlines | 3 | 2026-05-21 |
| UAL60 | - | 3 | 2026-04-14 |
| UAL32 | United Airlines | 3 | 2026-05-15 |
| UAL935 | United Airlines | 2 | 2026-05-12 |
| UAL61 | United Airlines | 2 | 2026-04-15 |
| UAL6 | United Airlines | 2 | 2026-05-19 |
| UAL27 | United Airlines | 2 | 2026-05-09 |
| UAL188 | United Airlines | 2 | 2026-05-27 |
| UAL1855 | United Airlines | 2 | 2026-05-10 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | UAL820 | MEX → SFO | May 30, 01:00 UTC | May 30, 01:15 UTC | 15m |
| 2026-05-29 | UAL820 | MEX → SFO | May 29, 07:40 UTC | May 29, 22:40 UTC | 15h 0m |
| 2026-05-28 | UAL353 | SAN → EWR | May 28, 23:55 UTC | May 29, 04:55 UTC | 5h 0m |
| 2026-05-27 | UAL187 | JNB → EWR | May 27, 20:05 UTC | May 27, 20:30 UTC | 25m |
| 2026-05-27 | UAL187 | JNB → EWR | May 27, 20:19 UTC | May 28, 11:39 UTC | 15h 20m |
| 2026-05-27 | UAL188 | EWR → JNB | May 27, 01:39 UTC | May 27, 15:55 UTC | 14h 16m |
| 2026-05-25 | UAL2222 | IAD → CPT | May 25, 18:05 UTC | May 26, 09:04 UTC | 14h 59m |
| 2026-05-25 | UAL1122 | EWR → CPT | May 25, 14:15 UTC | May 25, 14:40 UTC | 25m |
| 2026-05-24 | UAL2096 | LAX → EWR | May 24, 16:05 UTC | May 24, 20:40 UTC | 4h 35m |
| 2026-05-23 | UAL3935 | LHR → LAX | May 23, 16:45 UTC | May 23, 19:30 UTC | 2h 45m |
| 2026-05-21 | UAL63 | GRU → IAH | May 21, 01:15 UTC | May 21, 08:30 UTC | 7h 15m |
| 2026-05-21 | UAL63 | GRU → IAH | May 21, 01:11 UTC | May 21, 10:24 UTC | 9h 13m |
| 2026-05-20 | UAL62 | IAH → GRU | May 20, 00:15 UTC | May 20, 09:05 UTC | 8h 51m |
| 2026-05-19 | UAL6 | NRT → IAH | May 19, 08:10 UTC | May 19, 19:30 UTC | 11h 20m |
| 2026-05-18 | UAL79 | EWR → NRT | May 18, 15:40 UTC | May 19, 05:25 UTC | 13h 44m |
| 2026-05-17 | UAL187 | JNB → EWR | May 17, 20:10 UTC | May 17, 23:25 UTC | 3h 15m |
| 2026-05-17 | UAL187 | JNB → EWR | May 17, 20:19 UTC | May 18, 11:37 UTC | 15h 18m |
| 2026-05-17 | UAL188 | EWR → JNB | May 17, 02:15 UTC | May 17, 16:15 UTC | 14h 1m |
| 2026-05-16 | UAL78 | NRT → EWR | May 16, 08:31 UTC | May 16, 20:40 UTC | 12h 10m |
| 2026-05-15 | UAL32 | LAX → NRT | May 15, 18:30 UTC | May 16, 05:40 UTC | 11h 10m |
| 2026-05-14 | UAL821 | SFO → MEX | May 14, 14:10 UTC | May 15, 03:15 UTC | 13h 5m |
| 2026-05-14 | UAL821 | SFO → MEX | May 14, 09:10 UTC | May 14, 09:45 UTC | 35m |
| 2026-05-14 | UAL821 | SFO → MEX | May 14, 09:05 UTC | May 14, 11:26 UTC | 2h 21m |
| 2026-05-14 | UAL820 | MEX → SFO | May 14, 02:05 UTC | May 14, 02:40 UTC | 35m |
| 2026-05-14 | UAL820 | MEX → SFO | May 14, 00:20 UTC | May 14, 00:35 UTC | 15m |
| 2026-05-13 | UAL820 | MEX → SFO | May 13, 06:34 UTC | May 13, 21:46 UTC | 15h 12m |
| 2026-05-13 | UAL820 | MEX → SFO | May 13, 06:45 UTC | May 13, 22:00 UTC | 15h 15m |
| 2026-05-12 | UAL935 | LHR → LAX | May 12, 12:50 UTC | May 12, 23:20 UTC | 10h 30m |
| 2026-05-12 | UAL923 | LAX → LHR | May 12, 07:35 UTC | May 12, 08:55 UTC | 1h 20m |
| 2026-05-11 | UAL2692 | IAD → PHL | May 11, 13:40 UTC | May 11, 18:40 UTC | 5h 1m |
| 2026-05-10 | UAL1855 | ORD → BOS | May 10, 20:35 UTC | May 11, 01:30 UTC | 4h 55m |
| 2026-05-09 | UAL935 | LHR → LAX | May 9, 12:20 UTC | May 9, 22:39 UTC | 10h 20m |
| 2026-05-09 | UAL27 | DEN → LHR | May 9, 08:25 UTC | May 9, 09:55 UTC | 1h 30m |
| 2026-05-09 | UAL27 | DEN → LHR | May 9, 01:15 UTC | May 9, 04:45 UTC | 3h 30m |
| 2026-05-08 | UAL263 | EWR → PBI | May 8, 14:25 UTC | May 8, 23:25 UTC | 9h 0m |
| 2026-05-08 | UAL262 | DEN → LHR | May 8, 02:35 UTC | May 8, 10:59 UTC | 8h 25m |
| 2026-05-07 | UAL178 | KIX → GUM | May 7, 12:40 UTC | May 7, 23:09 UTC | 10h 30m |
| 2026-05-07 | UAL178 | KIX → GUM | May 7, 12:47 UTC | May 7, 23:04 UTC | 10h 17m |
| 2026-05-06 | UAL177 | GUM → KIX | May 6, 23:50 UTC | May 7, 09:50 UTC | 10h 0m |
| 2026-05-06 | UAL181 | FRA → DEN | May 6, 09:45 UTC | May 6, 19:20 UTC | 9h 34m |
| 2026-05-05 | UAL182 | DEN → FRA | May 5, 21:55 UTC | May 6, 06:45 UTC | 8h 50m |
| 2026-05-05 | UAL142 | NRT → DEN | May 5, 07:45 UTC | May 5, 17:50 UTC | 10h 5m |
| 2026-05-04 | UAL7 | IAH → NRT | May 4, 15:35 UTC | May 5, 04:55 UTC | 13h 21m |
| 2026-05-04 | UAL63 | GRU → IAH | May 4, 01:15 UTC | May 4, 10:35 UTC | 9h 20m |
| 2026-05-03 | UAL62 | IAH → GRU | May 3, 01:55 UTC | May 3, 10:10 UTC | 8h 14m |
| 2026-05-03 | UAL62 | IAH → GRU | May 3, 00:55 UTC | May 3, 01:05 UTC | 10m |
| 2026-05-03 | UAL62 | IAH → GRU | May 3, 00:58 UTC | May 3, 10:07 UTC | 9h 9m |
| 2026-05-02 | UAL6 | NRT → IAH | May 2, 08:15 UTC | May 2, 19:45 UTC | 11h 30m |
| 2026-05-01 | UAL79 | EWR → NRT | May 1, 15:47 UTC | May 2, 05:15 UTC | 13h 28m |
| 2026-05-01 | UAL79 | EWR → NRT | May 1, 15:35 UTC | May 2, 05:05 UTC | 13h 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 N17963 page for operator, model, and routing details .