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
- 209
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 25, 22:35 UTC
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 |
| GTI8102 | - | 7 | 2026-07-15 |
| GTI8002 | - | 6 | 2026-07-11 |
| GTI516 | Atlas Air | 6 | 2026-07-22 |
| GTI863 | Atlas Air | 5 | 2026-06-10 |
| GTI8294 | Atlas Air | 5 | 2026-07-18 |
| GTI517 | - | 5 | 2026-07-14 |
| 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 |
| 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 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | GTI8227 | ANC → HKG | Jul 25, 10:35 UTC | Jul 25, 22:30 UTC | 11h 55m |
| 2026-07-25 | GTI8227 | ANC → HKG | Jul 25, 03:35 UTC | Jul 25, 08:05 UTC | 4h 30m |
| 2026-07-24 | GTI034 | SCL → MIA | Jul 24, 15:15 UTC | Jul 24, 19:45 UTC | 4h 30m |
| 2026-07-23 | GTI033 | MIA → EZE | Jul 23, 10:40 UTC | Jul 23, 11:25 UTC | 45m |
| 2026-07-22 | GTI033 | MIA → EZE | Jul 22, 23:20 UTC | Jul 23, 07:35 UTC | 8h 15m |
| 2026-07-22 | GTI516 | ANC → BNA | Jul 22, 11:45 UTC | Jul 22, 18:40 UTC | 6h 55m |
| 2026-07-21 | GTI516 | ANC → BNA | Jul 21, 18:45 UTC | Jul 22, 04:15 UTC | 9h 30m |
| 2026-07-20 | GTI8559 | ORD → ICN | Jul 20, 04:00 UTC | Jul 20, 17:30 UTC | 13h 30m |
| 2026-07-19 | GTI8996 | ORD → CHS | Jul 19, 13:15 UTC | Jul 19, 18:15 UTC | 5h 0m |
| 2026-07-19 | GTI8996 | ORD → CHS | Jul 19, 02:40 UTC | Jul 19, 11:20 UTC | 8h 40m |
| 2026-07-18 | GTI8995 | HHN → PSM | Jul 18, 21:15 UTC | Jul 18, 23:20 UTC | 2h 5m |
| 2026-07-18 | GTI8294 | SYD → HNL | Jul 18, 13:10 UTC | Jul 18, 13:35 UTC | 25m |
| 2026-07-18 | GTI8294 | SYD → HNL | Jul 18, 04:45 UTC | Jul 18, 12:30 UTC | 7h 45m |
| 2026-07-17 | GTI8294 | SYD → HNL | Jul 17, 18:55 UTC | Jul 17, 22:49 UTC | 3h 55m |
| 2026-07-17 | GTI8294 | SYD → HNL | Jul 17, 06:25 UTC | Jul 17, 15:35 UTC | 9h 10m |
| 2026-07-17 | GTI8294 | - | Jul 17, 00:35 UTC | Jul 17, 02:39 UTC | 2h 5m |
| 2026-07-16 | GTI9271 | - | Jul 16, 07:15 UTC | Jul 16, 14:50 UTC | 7h 35m |
| 2026-07-15 | GTI8102 | - | Jul 15, 22:10 UTC | Jul 16, 04:00 UTC | 5h 50m |
| 2026-07-15 | GTI8102 | - | Jul 15, 13:50 UTC | Jul 15, 19:30 UTC | 5h 40m |
| 2026-07-14 | GTI8102 | - | Jul 14, 17:35 UTC | Jul 15, 11:40 UTC | 18h 4m |
| 2026-07-14 | GTI8102 | - | Jul 14, 16:05 UTC | Jul 15, 11:40 UTC | 19h 34m |
| 2026-07-14 | GTI517 | - | Jul 14, 09:35 UTC | Jul 15, 06:00 UTC | 20h 24m |
| 2026-07-14 | GTI517 | - | Jul 14, 05:35 UTC | Jul 15, 05:30 UTC | 23h 54m |
| 2026-07-14 | GTI517 | - | Jul 14, 04:25 UTC | Jul 14, 17:50 UTC | 13h 25m |
| 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 |
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 .