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
- 91
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- 20h ago
Last known 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 |
|---|---|---|---|
| GTI8193 | Atlas Air | 13 | 2026-05-19 |
| GTI8174 | Atlas Air | 8 | 2026-05-28 |
| GTI8173 | Atlas Air | 5 | 2026-05-24 |
| GTI8002 | Atlas Air | 5 | 2026-04-14 |
| CMB379 | - | 5 | 2026-04-17 |
| GTI9868 | Atlas Air | 3 | 2026-04-17 |
| GTI9813 | Atlas Air | 3 | 2026-04-14 |
| GTI8644 | Atlas Air | 3 | 2026-04-24 |
| GTI8120 | Atlas Air | 3 | 2026-05-05 |
| GTI7481 | Atlas Air | 3 | 2026-04-22 |
| GTI604 | - | 3 | 2026-04-13 |
| GTI512 | Atlas Air | 3 | 2026-04-26 |
| GTI9969 | - | 2 | 2026-05-28 |
| GTI9175 | Atlas Air | 2 | 2026-04-28 |
| GTI8728 | Atlas Air | 2 | 2026-05-27 |
| GTI8506 | Atlas Air | 2 | 2026-05-07 |
| GTI8422 | Atlas Air | 2 | 2026-05-08 |
| GTI8365 | Atlas Air | 2 | 2026-05-21 |
| GTI8275 | Atlas Air | 2 | 2026-05-23 |
| GTI8274 | Atlas Air | 2 | 2026-05-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | GTI8174 | ANC → NLU | May 28, 22:35 UTC | May 29, 11:35 UTC | 13h 0m |
| 2026-05-28 | GTI9969 | - | May 28, 13:15 UTC | May 28, 13:35 UTC | 20m |
| 2026-05-28 | GTI9969 | - | May 28, 02:00 UTC | May 28, 12:40 UTC | 10h 40m |
| 2026-05-27 | GTI8728 | LAX → HIF | May 27, 08:20 UTC | May 27, 17:10 UTC | 8h 50m |
| 2026-05-27 | GTI8728 | LAX → HIF | May 27, 02:29 UTC | May 27, 03:59 UTC | 1h 30m |
| 2026-05-25 | GTI8174 | ANC → NLU | May 25, 19:54 UTC | May 25, 20:59 UTC | 1h 5m |
| 2026-05-25 | GTI8174 | ANC → NLU | May 25, 17:35 UTC | May 25, 17:45 UTC | 10m |
| 2026-05-25 | GTI8174 | ANC → NLU | May 25, 07:50 UTC | May 25, 12:45 UTC | 4h 55m |
| 2026-05-24 | GTI8173 | LAX → PVG | May 24, 09:35 UTC | May 25, 05:25 UTC | 19h 50m |
| 2026-05-24 | GTI8173 | LAX → PVG | May 24, 08:20 UTC | May 25, 05:25 UTC | 21h 5m |
| 2026-05-24 | GTI8173 | LAX → PVG | May 24, 05:35 UTC | May 25, 05:25 UTC | 23h 50m |
| 2026-05-24 | GTI8173 | LAX → PVG | May 24, 04:05 UTC | May 24, 23:30 UTC | 19h 25m |
| 2026-05-23 | GTI8275 | HNL → BNE | May 23, 14:00 UTC | May 23, 18:45 UTC | 4h 45m |
| 2026-05-22 | GTI8275 | HNL → BNE | May 22, 17:35 UTC | May 23, 12:10 UTC | 18h 34m |
| 2026-05-22 | GTI8274 | NLU → AUS | May 22, 07:35 UTC | May 23, 06:20 UTC | 22h 44m |
| 2026-05-22 | GTI8274 | NLU → AUS | May 22, 06:50 UTC | May 23, 05:30 UTC | 22h 39m |
| 2026-05-21 | GTI8365 | PVG → ANC | May 21, 08:10 UTC | May 21, 21:40 UTC | 13h 30m |
| 2026-05-20 | GTI8365 | PVG → ANC | May 20, 16:35 UTC | May 21, 06:15 UTC | 13h 40m |
| 2026-05-20 | GTI8522 | ORD → ICN | May 20, 00:45 UTC | May 20, 14:30 UTC | 13h 46m |
| 2026-05-19 | GTI8193 | YYZ → DFW | May 19, 16:30 UTC | May 19, 21:45 UTC | 5h 15m |
| 2026-05-19 | GTI8193 | YYZ → DFW | May 19, 07:15 UTC | May 19, 14:30 UTC | 7h 15m |
| 2026-05-19 | GTI8193 | YYZ → DFW | May 19, 04:00 UTC | May 19, 04:25 UTC | 25m |
| 2026-05-18 | GTI8192 | DFW → HKG | May 18, 19:55 UTC | May 18, 20:20 UTC | 25m |
| 2026-05-18 | GTI9012 | MIA → ORD | May 18, 05:15 UTC | May 18, 17:40 UTC | 12h 25m |
| 2026-05-18 | GTI8537 | HNL → SYD | May 18, 00:10 UTC | May 18, 02:50 UTC | 2h 40m |
| 2026-05-11 | GTI8570 | HKG → GYD | May 11, 17:40 UTC | May 11, 20:25 UTC | 2h 45m |
| 2026-05-09 | GTI058 | VCP → UIO | May 9, 22:10 UTC | May 10, 11:00 UTC | 12h 50m |
| 2026-05-09 | GTI057 | MIA → VCP | May 9, 12:05 UTC | May 9, 19:14 UTC | 7h 10m |
| 2026-05-08 | GTI8422 | ANC → MIA | May 8, 22:20 UTC | May 9, 05:20 UTC | 7h 0m |
| 2026-05-08 | GTI8422 | ANC → MIA | May 8, 07:55 UTC | May 8, 19:50 UTC | 11h 55m |
| 2026-05-08 | - | - | May 8, 02:55 UTC | May 8, 03:04 UTC | 10m |
| 2026-05-07 | GTI9914 | FFD → ICN | May 7, 15:15 UTC | May 8, 01:59 UTC | 10h 45m |
| 2026-05-07 | GTI8506 | HNL → RIV | May 7, 00:55 UTC | May 7, 09:55 UTC | 9h 0m |
| 2026-05-06 | GTI8506 | HNL → RIV | May 6, 18:20 UTC | May 6, 21:10 UTC | 2h 50m |
| 2026-05-05 | GTI8120 | HOP → HHN | May 5, 14:45 UTC | May 5, 19:55 UTC | 5h 10m |
| 2026-05-05 | GTI8120 | HOP → HHN | May 5, 06:15 UTC | May 5, 13:00 UTC | 6h 45m |
| 2026-05-04 | GTI8120 | HOP → HHN | May 4, 16:55 UTC | May 5, 13:00 UTC | 20h 6m |
| 2026-05-04 | GTI8117 | ORD → ICN | May 4, 00:10 UTC | May 4, 14:55 UTC | 14h 45m |
| 2026-05-03 | GTI658 | ANC → ORD | May 3, 13:35 UTC | May 3, 18:40 UTC | 5h 5m |
| 2026-05-03 | GTI658 | ANC → ORD | May 3, 04:40 UTC | May 3, 11:45 UTC | 7h 5m |
| 2026-04-28 | GTI9175 | MIA → ANC | Apr 28, 23:05 UTC | Apr 29, 12:05 UTC | 13h 1m |
| 2026-04-28 | GTI9175 | MIA → ANC | Apr 28, 18:25 UTC | Apr 28, 20:00 UTC | 1h 35m |
| 2026-04-28 | GTI8174 | ANC → NLU | Apr 28, 06:55 UTC | Apr 28, 12:50 UTC | 5h 55m |
| 2026-04-27 | GTI8174 | ANC → NLU | Apr 27, 22:30 UTC | Apr 28, 05:25 UTC | 6h 55m |
| 2026-04-27 | GTI8174 | ANC → NLU | Apr 27, 07:35 UTC | Apr 28, 05:25 UTC | 21h 50m |
| 2026-04-27 | GTI8174 | ANC → NLU | Apr 27, 07:00 UTC | Apr 28, 05:25 UTC | 22h 25m |
| 2026-04-26 | GTI8173 | LAX → PVG | Apr 26, 20:30 UTC | Apr 27, 08:40 UTC | 12h 10m |
| 2026-04-26 | GTI512 | ANC → ORD | Apr 26, 13:45 UTC | Apr 26, 17:15 UTC | 3h 30m |
| 2026-04-26 | GTI512 | ANC → ORD | Apr 26, 04:20 UTC | Apr 26, 10:25 UTC | 6h 5m |
| 2026-04-25 | GTI512 | ANC → ORD | Apr 25, 14:30 UTC | Apr 26, 02:30 UTC | 12h 0m |
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 .