sensors Mode-S transponder
A2CB33
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N27965 · BOEING 787-9 Dreamliner · operated by UNITED AIRLINES INC
- Hex
- A2CB33
- Octal
- 50545463
- Decimal
- 10,668,851
- Country
- US
- Tail
- N27965
- Type
- B789
- Flights observed
- 71
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 41m ago
Current position
Country allocation
The ICAO 24-bit address A2CB33 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 |
|---|---|---|---|
| UAL29 | United Airlines | 6 | 2026-05-07 |
| UAL893 | United Airlines | 4 | 2026-05-14 |
| UAL863 | United Airlines | 4 | 2026-05-17 |
| UAL28 | United Airlines | 4 | 2026-05-08 |
| UAL2679 | United Airlines | 4 | 2026-04-13 |
| UAL2303 | United Airlines | 4 | 2026-04-17 |
| UAL187 | United Airlines | 4 | 2026-05-28 |
| UAL114 | United Airlines | 4 | 2026-05-16 |
| UAL892 | United Airlines | 3 | 2026-05-15 |
| UAL870 | United Airlines | 3 | 2026-05-14 |
| UAL3042 | United Airlines | 3 | 2026-04-17 |
| UAL2096 | United Airlines | 3 | 2026-04-16 |
| UAL188 | United Airlines | 3 | 2026-05-28 |
| UAL115 | United Airlines | 3 | 2026-05-15 |
| UAL32 | United Airlines | 2 | 2026-05-18 |
| UAL28D | United Airlines | 2 | 2026-04-30 |
| UAL123 | United Airlines | 2 | 2026-05-21 |
| UAL901 | United Airlines | 1 | 2026-05-11 |
| UAL900 | United Airlines | 1 | 2026-05-12 |
| UAL842 | United Airlines | 1 | 2026-05-18 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | UAL353 | SAN → EWR | May 29, 23:15 UTC | May 30, 02:45 UTC | 3h 30m |
| 2026-05-28 | UAL187 | JNB → EWR | May 28, 20:10 UTC | May 29, 11:40 UTC | 15h 30m |
| 2026-05-28 | UAL188 | EWR → JNB | May 28, 03:35 UTC | May 28, 17:25 UTC | 13h 50m |
| 2026-05-23 | UAL187 | JNB → EWR | May 23, 20:19 UTC | May 24, 11:15 UTC | 14h 56m |
| 2026-05-23 | UAL187 | JNB → EWR | May 23, 20:19 UTC | May 24, 11:21 UTC | 15h 2m |
| 2026-05-23 | UAL187 | JNB → EWR | May 23, 20:00 UTC | May 23, 20:30 UTC | 30m |
| 2026-05-23 | UAL188 | EWR → JNB | May 23, 01:54 UTC | May 23, 15:44 UTC | 13h 50m |
| 2026-05-23 | UAL188 | EWR → JNB | May 23, 02:00 UTC | May 23, 15:45 UTC | 13h 45m |
| 2026-05-22 | UAL713 | ORD → DEL | May 22, 19:05 UTC | May 22, 23:45 UTC | 4h 40m |
| 2026-05-21 | UAL1227 | PHX → IAD | May 21, 18:20 UTC | May 21, 23:30 UTC | 5h 10m |
| 2026-05-21 | UAL123 | ANC → ORD | May 21, 07:10 UTC | May 21, 08:30 UTC | 1h 20m |
| 2026-05-21 | UAL123 | ANC → ORD | May 21, 07:02 UTC | May 21, 14:24 UTC | 7h 22m |
| 2026-05-20 | UAL122 | IAD → LHR | May 20, 14:15 UTC | May 20, 20:25 UTC | 6h 10m |
| 2026-05-19 | UAL1855 | ORD → BOS | May 19, 20:35 UTC | May 20, 01:00 UTC | 4h 25m |
| 2026-05-19 | UAL33 | NRT → LAX | May 19, 08:10 UTC | May 19, 17:30 UTC | 9h 20m |
| 2026-05-18 | UAL32 | LAX → NRT | May 18, 17:55 UTC | May 19, 04:59 UTC | 11h 4m |
| 2026-05-18 | UAL32 | LAX → NRT | May 18, 17:45 UTC | May 19, 05:00 UTC | 11h 14m |
| 2026-05-18 | UAL842 | SYD → LAX | May 18, 00:00 UTC | May 18, 12:55 UTC | 12h 55m |
| 2026-05-17 | UAL863 | SFO → SYD | May 17, 06:15 UTC | May 17, 20:55 UTC | 14h 40m |
| 2026-05-16 | UAL114 | PPT → SFO | May 16, 07:20 UTC | May 16, 15:10 UTC | 7h 50m |
| 2026-05-16 | UAL114 | PPT → SFO | May 16, 07:30 UTC | May 16, 15:07 UTC | 7h 37m |
| 2026-05-15 | UAL115 | SFO → PPT | May 15, 21:10 UTC | May 16, 05:10 UTC | 8h 0m |
| 2026-05-15 | UAL892 | ICN → SFO | May 15, 08:00 UTC | May 15, 18:30 UTC | 10h 29m |
| 2026-05-14 | UAL893 | SFO → ICN | May 14, 17:50 UTC | May 15, 04:42 UTC | 10h 52m |
| 2026-05-14 | UAL893 | SFO → ICN | May 14, 17:40 UTC | May 14, 22:45 UTC | 5h 5m |
| 2026-05-14 | UAL870 | SYD → SFO | May 14, 00:50 UTC | May 14, 14:05 UTC | 13h 15m |
| 2026-05-13 | UAL863 | SFO → SYD | May 13, 06:21 UTC | May 13, 21:02 UTC | 14h 41m |
| 2026-05-13 | UAL863 | SFO → SYD | May 13, 06:45 UTC | May 13, 07:10 UTC | 25m |
| 2026-05-12 | UAL900 | LHR → SFO | May 12, 09:55 UTC | May 12, 20:25 UTC | 10h 30m |
| 2026-05-11 | UAL901 | SFO → LHR | May 11, 20:35 UTC | May 12, 06:10 UTC | 9h 35m |
| 2026-05-11 | UAL892 | ICN → SFO | May 11, 07:55 UTC | May 11, 18:00 UTC | 10h 6m |
| 2026-05-10 | UAL893 | SFO → ICN | May 10, 18:05 UTC | May 11, 05:30 UTC | 11h 25m |
| 2026-05-10 | UAL114 | PPT → SFO | May 10, 07:10 UTC | May 10, 14:54 UTC | 7h 45m |
| 2026-05-10 | UAL114 | PPT → SFO | May 10, 07:10 UTC | May 10, 14:52 UTC | 7h 42m |
| 2026-05-09 | UAL115 | SFO → PPT | May 9, 20:52 UTC | May 10, 04:23 UTC | 7h 31m |
| 2026-05-09 | UAL115 | SFO → PPT | May 9, 20:34 UTC | May 10, 04:45 UTC | 8h 10m |
| 2026-05-08 | UAL28 | SIN → SFO | May 8, 14:06 UTC | May 9, 04:37 UTC | 14h 31m |
| 2026-05-08 | UAL28 | SIN → SFO | May 8, 07:14 UTC | May 8, 20:35 UTC | 13h 20m |
| 2026-05-07 | UAL29 | SFO → SIN | May 7, 18:50 UTC | May 8, 18:45 UTC | 23h 55m |
| 2026-05-07 | UAL29 | SFO → SIN | May 7, 18:04 UTC | May 8, 10:17 UTC | 16h 13m |
| 2026-05-07 | UAL29 | SFO → SIN | May 7, 18:15 UTC | May 8, 08:55 UTC | 14h 39m |
| 2026-05-07 | UAL870 | SYD → SFO | May 7, 00:45 UTC | May 7, 14:11 UTC | 13h 26m |
| 2026-05-07 | UAL870 | SYD → SFO | May 7, 01:15 UTC | May 7, 14:20 UTC | 13h 5m |
| 2026-05-06 | UAL863 | SFO → SYD | May 6, 06:25 UTC | May 6, 20:40 UTC | 14h 15m |
| 2026-05-04 | UAL892 | ICN → SFO | May 4, 08:05 UTC | May 4, 18:05 UTC | 10h 0m |
| 2026-05-03 | UAL893 | SFO → ICN | May 3, 17:50 UTC | May 4, 05:40 UTC | 11h 50m |
| 2026-05-03 | UAL806 | ICN → SFO | May 3, 02:50 UTC | May 3, 13:05 UTC | 10h 14m |
| 2026-05-02 | UAL805 | SFO → ICN | May 2, 07:15 UTC | May 2, 19:20 UTC | 12h 5m |
| 2026-05-01 | UAL28 | SIN → SFO | May 1, 14:25 UTC | May 2, 03:25 UTC | 13h 0m |
| 2026-04-30 | UAL29 | SFO → SIN | Apr 30, 18:05 UTC | May 1, 09:00 UTC | 14h 56m |
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 N27965 page for operator, model, and routing details .