sensors Mode-S transponder
A5823E
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N454PA · BOEING 747-400 · operated by ATLAS AIR INC
- Hex
- A5823E
- Octal
- 51301076
- Decimal
- 10,846,782
- Country
- US
- Tail
- N454PA
- Type
- B744
- Flights observed
- 186
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 4h ago
Current position
Country allocation
The ICAO 24-bit address A5823E 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 |
|---|---|---|---|
| GTI8174 | - | 14 | 2026-06-19 |
| GTI8193 | Atlas Air | 13 | 2026-05-19 |
| GTI8173 | - | 9 | 2026-06-18 |
| GTI8002 | - | 6 | 2026-07-11 |
| GTI863 | Atlas Air | 5 | 2026-06-10 |
| CMB379 | - | 5 | 2026-04-17 |
| GTI8998 | - | 4 | 2026-07-10 |
| GTI8997 | - | 4 | 2026-07-09 |
| GTI8853 | - | 4 | 2026-06-25 |
| GTI8537 | - | 4 | 2026-07-04 |
| GTI604 | Atlas Air | 4 | 2026-06-07 |
| GTI516 | Atlas Air | 4 | 2026-06-17 |
| GTI9868 | Atlas Air | 3 | 2026-04-17 |
| GTI9813 | Atlas Air | 3 | 2026-04-14 |
| GTI8676 | - | 3 | 2026-06-21 |
| GTI8644 | Atlas Air | 3 | 2026-04-24 |
| GTI862 | Atlas Air | 3 | 2026-06-09 |
| GTI8501 | Atlas Air | 3 | 2026-06-06 |
| GTI8296 | Atlas Air | 3 | 2026-06-03 |
| GTI8153 | - | 3 | 2026-06-30 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | GTI517 | - | Jul 14, 04:25 UTC | Jul 14, 06:20 UTC | 1h 55m |
| 2026-07-13 | GTI811 | YYZ → ORD | Jul 13, 16:40 UTC | Jul 13, 17:40 UTC | 1h 0m |
| 2026-07-13 | GTI812 | ANC → YYZ | Jul 13, 08:05 UTC | Jul 13, 13:35 UTC | 5h 30m |
| 2026-07-12 | GTI812 | ICN → ANC | Jul 12, 16:15 UTC | Jul 13, 05:45 UTC | 13h 30m |
| 2026-07-12 | GTI9462 | - | Jul 12, 08:01 UTC | Jul 12, 08:25 UTC | 25m |
| 2026-07-11 | GTI9462 | - | Jul 11, 22:05 UTC | Jul 12, 07:15 UTC | 9h 10m |
| 2026-07-11 | CMB450 | - | Jul 11, 13:35 UTC | Jul 11, 15:40 UTC | 2h 5m |
| 2026-07-11 | CMB450 | - | Jul 11, 06:01 UTC | Jul 11, 13:30 UTC | 7h 30m |
| 2026-07-11 | GTI8002 | - | Jul 11, 00:50 UTC | Jul 11, 01:25 UTC | 35m |
| 2026-07-10 | GTI8998 | - | Jul 10, 11:15 UTC | Jul 10, 18:50 UTC | 7h 35m |
| 2026-07-09 | GTI8998 | - | Jul 9, 14:10 UTC | Jul 10, 08:05 UTC | 17h 55m |
| 2026-07-09 | GTI8997 | - | Jul 9, 08:30 UTC | Jul 10, 07:30 UTC | 23h 0m |
| 2026-07-08 | GTI8997 | - | Jul 8, 21:50 UTC | Jul 9, 05:35 UTC | 7h 45m |
| 2026-07-08 | GTI8998 | - | Jul 8, 10:40 UTC | Jul 8, 17:55 UTC | 7h 15m |
| 2026-07-07 | GTI8998 | - | Jul 7, 13:50 UTC | Jul 8, 08:25 UTC | 18h 35m |
| 2026-07-07 | GTI8997 | - | Jul 7, 08:10 UTC | Jul 8, 07:30 UTC | 23h 20m |
| 2026-07-06 | GTI8997 | - | Jul 6, 22:10 UTC | Jul 7, 06:20 UTC | 8h 10m |
| 2026-07-06 | GTI654 | - | Jul 6, 07:55 UTC | Jul 6, 10:25 UTC | 2h 30m |
| 2026-07-05 | GTI654 | ANC → ORD | Jul 5, 21:20 UTC | Jul 6, 02:30 UTC | 5h 10m |
| 2026-07-05 | GTI654 | HKG → ANC | Jul 5, 09:35 UTC | Jul 5, 19:00 UTC | 9h 25m |
| 2026-07-04 | GTI8537 | - | Jul 4, 18:50 UTC | Jul 5, 05:35 UTC | 10h 45m |
| 2026-07-04 | GTI8537 | - | Jul 4, 15:25 UTC | Jul 4, 15:50 UTC | 25m |
| 2026-07-04 | GTI8537 | - | Jul 4, 10:40 UTC | Jul 4, 11:05 UTC | 25m |
| 2026-07-04 | GTI9223 | - | Jul 4, 02:05 UTC | Jul 4, 07:05 UTC | 5h 0m |
| 2026-07-03 | GTI9271 | - | Jul 3, 16:55 UTC | Jul 3, 17:25 UTC | 30m |
| 2026-07-02 | GTI8102 | - | Jul 2, 09:45 UTC | Jul 2, 15:45 UTC | 6h 0m |
| 2026-07-02 | GTI8102 | - | Jul 2, 01:15 UTC | Jul 2, 06:51 UTC | 5h 36m |
| 2026-07-01 | GTI8102 | - | Jul 1, 10:05 UTC | Jul 1, 23:00 UTC | 12h 55m |
| 2026-07-01 | GTI8158 | - | Jul 1, 04:25 UTC | Jul 1, 04:50 UTC | 25m |
| 2026-06-30 | GTI8158 | - | Jun 30, 17:20 UTC | Jul 1, 03:35 UTC | 10h 15m |
| 2026-06-30 | GTI8153 | - | Jun 30, 07:50 UTC | Jun 30, 12:20 UTC | 4h 30m |
| 2026-06-29 | GTI8153 | - | Jun 29, 15:34 UTC | Jun 30, 12:20 UTC | 20h 46m |
| 2026-06-29 | GTI8153 | - | Jun 29, 15:19 UTC | Jun 30, 12:20 UTC | 21h 1m |
| 2026-06-28 | GTI8941 | ORD → ICN | Jun 28, 11:19 UTC | Jun 29, 00:49 UTC | 13h 30m |
| 2026-06-28 | GTI365 | - | Jun 28, 02:25 UTC | Jun 28, 07:54 UTC | 5h 30m |
| 2026-06-27 | GTI365 | - | Jun 27, 10:05 UTC | Jun 28, 00:04 UTC | 14h 0m |
| 2026-06-26 | GTI364 | - | Jun 26, 23:44 UTC | Jun 27, 23:29 UTC | 23h 45m |
| 2026-06-25 | GTI638 | HKG → ANC | Jun 25, 21:40 UTC | Jun 26, 02:05 UTC | 4h 25m |
| 2026-06-25 | GTI638 | HKG → ANC | Jun 25, 11:04 UTC | Jun 25, 19:39 UTC | 8h 35m |
| 2026-06-25 | GTI638 | HKG → ANC | Jun 25, 10:15 UTC | Jun 25, 10:30 UTC | 15m |
| 2026-06-25 | GTI8853 | - | Jun 25, 07:00 UTC | Jun 25, 07:25 UTC | 25m |
| 2026-06-25 | GTI8853 | - | Jun 25, 03:59 UTC | Jun 25, 04:20 UTC | 20m |
| 2026-06-24 | GTI8853 | - | Jun 24, 00:44 UTC | Jun 24, 07:20 UTC | 6h 35m |
| 2026-06-22 | GTI8853 | - | Jun 22, 22:34 UTC | Jun 23, 09:24 UTC | 10h 50m |
| 2026-06-22 | GTI8675 | - | Jun 22, 15:29 UTC | Jun 22, 20:14 UTC | 4h 45m |
| 2026-06-21 | GTI8676 | - | Jun 21, 16:49 UTC | Jun 22, 10:00 UTC | 17h 10m |
| 2026-06-21 | GTI8676 | ANC → DFW | Jun 21, 07:49 UTC | Jun 21, 13:24 UTC | 5h 35m |
| 2026-06-20 | GTI8676 | ICN → ANC | Jun 20, 16:00 UTC | Jun 21, 05:25 UTC | 13h 25m |
| 2026-06-20 | GTI8065 | ANC → ICN | Jun 20, 00:39 UTC | Jun 20, 12:45 UTC | 12h 5m |
| 2026-06-19 | GTI8174 | - | Jun 19, 20:40 UTC | Jun 19, 22:09 UTC | 1h 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 N454PA page for operator, model, and routing details .