sensors Mode-S transponder
4841AD
ICAO 24-bit transponder address · allocated to Netherlands
Currently assigned to PH-BQN · BOEING 777-200
- Hex
- 4841AD
- Octal
- 22040655
- Decimal
- 4,735,405
- Country
- NL
- Tail
- PH-BQN
- Type
- B772
- Flights observed
- 202
- Distinct callsigns
- 20
- Country
- NL
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address 4841AD falls within the block assigned to Netherlands (NL) by ICAO Annex 10, Volume III. Every aircraft registered in Netherlands 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 |
|---|---|---|---|
| KLM702 | - | 25 | 2026-06-25 |
| KLM701 | - | 25 | 2026-06-25 |
| KLM686 | KLM Royal Dutch Airlines | 14 | 2026-06-05 |
| KLM685 | KLM Royal Dutch Airlines | 13 | 2026-06-04 |
| KLM636 | - | 11 | 2026-06-19 |
| KLM635 | - | 9 | 2026-06-18 |
| KLM874 | - | 6 | 2026-07-10 |
| KLM610 | - | 6 | 2026-06-20 |
| KLM609 | - | 6 | 2026-06-19 |
| KLM268 | KLM Royal Dutch Airlines | 5 | 2026-05-24 |
| KLM808 | KLM Royal Dutch Airlines | 4 | 2026-05-17 |
| KLM807 | KLM Royal Dutch Airlines | 4 | 2026-05-17 |
| KLM896 | KLM Royal Dutch Airlines | 3 | 2026-05-05 |
| KLM862 | - | 3 | 2026-07-12 |
| KLM861 | - | 3 | 2026-07-11 |
| KLM844 | - | 3 | 2026-06-30 |
| KLM843 | - | 3 | 2026-06-29 |
| KLM758 | KLM Royal Dutch Airlines | 3 | 2026-05-21 |
| KLM661 | - | 3 | 2026-07-09 |
| KLM646 | - | 3 | 2026-07-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | KLM565 | - | Jul 14, 18:45 UTC | Jul 14, 18:55 UTC | 10m |
| 2026-07-14 | KLM565 | - | Jul 14, 11:10 UTC | Jul 14, 14:30 UTC | 3h 20m |
| 2026-07-13 | KLM856 | - | Jul 13, 15:15 UTC | Jul 14, 02:55 UTC | 11h 40m |
| 2026-07-13 | KLM856 | - | Jul 13, 14:00 UTC | Jul 13, 14:20 UTC | 20m |
| 2026-07-13 | KLM855 | - | Jul 13, 07:40 UTC | Jul 13, 08:05 UTC | 25m |
| 2026-07-12 | KLM855 | - | Jul 12, 21:05 UTC | Jul 13, 06:45 UTC | 9h 40m |
| 2026-07-12 | KLM862 | - | Jul 12, 03:25 UTC | Jul 12, 16:50 UTC | 13h 25m |
| 2026-07-11 | KLM861 | AMS → NRT | Jul 11, 12:10 UTC | Jul 12, 00:45 UTC | 12h 35m |
| 2026-07-10 | KLM874 | - | Jul 10, 11:20 UTC | Jul 11, 06:30 UTC | 19h 10m |
| 2026-07-10 | KLM874 | AMS → AMS | Jul 10, 10:15 UTC | Jul 11, 06:30 UTC | 20h 16m |
| 2026-07-09 | KLM192 | - | Jul 9, 20:50 UTC | Jul 10, 05:40 UTC | 8h 50m |
| 2026-07-09 | KLM661 | - | Jul 9, 08:25 UTC | Jul 9, 18:15 UTC | 9h 50m |
| 2026-07-08 | KLM192 | - | Jul 8, 20:40 UTC | Jul 9, 05:40 UTC | 9h 0m |
| 2026-07-08 | KLM661 | - | Jul 8, 08:45 UTC | Jul 8, 18:25 UTC | 9h 40m |
| 2026-07-07 | KLM888 | - | Jul 7, 22:50 UTC | Jul 8, 03:55 UTC | 5h 5m |
| 2026-07-07 | KLM888 | - | Jul 7, 14:55 UTC | Jul 7, 15:15 UTC | 20m |
| 2026-07-07 | KLM887 | - | Jul 7, 06:35 UTC | Jul 7, 07:05 UTC | 30m |
| 2026-07-06 | KLM887 | - | Jul 6, 19:50 UTC | Jul 6, 23:40 UTC | 3h 50m |
| 2026-07-06 | KLM646 | JFK → AMS | Jul 6, 00:05 UTC | Jul 6, 06:20 UTC | 6h 15m |
| 2026-07-05 | KLM207 | - | Jul 5, 13:25 UTC | Jul 5, 20:50 UTC | 7h 25m |
| 2026-07-04 | KLM188 | - | Jul 4, 13:20 UTC | Jul 5, 07:45 UTC | 18h 25m |
| 2026-07-04 | KLM163 | AMS → AMS | Jul 4, 11:50 UTC | Jul 5, 07:45 UTC | 19h 55m |
| 2026-07-04 | KLM174 | - | Jul 4, 03:05 UTC | Jul 4, 05:30 UTC | 2h 25m |
| 2026-07-03 | KLM565 | - | Jul 3, 10:45 UTC | Jul 3, 14:45 UTC | 4h 0m |
| 2026-07-02 | KLM592 | - | Jul 2, 21:35 UTC | Jul 3, 08:10 UTC | 10h 35m |
| 2026-07-02 | KLM591 | AMS → JNB | Jul 2, 09:15 UTC | Jul 2, 19:25 UTC | 10h 10m |
| 2026-06-30 | KLM844 | - | Jun 30, 05:25 UTC | Jun 30, 17:00 UTC | 11h 35m |
| 2026-06-29 | KLM843 | - | Jun 29, 15:54 UTC | Jun 30, 02:35 UTC | 10h 41m |
| 2026-06-29 | KLM248 | ATL → AMS | Jun 29, 02:45 UTC | Jun 29, 10:24 UTC | 7h 40m |
| 2026-06-28 | KLM133 | AMS → ATL | Jun 28, 16:05 UTC | Jun 29, 00:20 UTC | 8h 15m |
| 2026-06-28 | KLM248 | - | Jun 28, 02:54 UTC | Jun 28, 10:35 UTC | 7h 40m |
| 2026-06-27 | KLM133 | - | Jun 27, 15:45 UTC | Jun 28, 00:09 UTC | 8h 25m |
| 2026-06-26 | KLM874 | - | Jun 26, 11:20 UTC | Jun 27, 06:15 UTC | 18h 55m |
| 2026-06-26 | KLM874 | - | Jun 26, 10:10 UTC | Jun 27, 06:15 UTC | 20h 5m |
| 2026-06-25 | KLM702 | - | Jun 25, 18:29 UTC | Jun 26, 07:05 UTC | 12h 35m |
| 2026-06-25 | KLM702 | - | Jun 25, 14:34 UTC | Jun 25, 16:09 UTC | 1h 35m |
| 2026-06-25 | KLM701 | - | Jun 25, 10:39 UTC | Jun 25, 10:59 UTC | 20m |
| 2026-06-24 | KLM701 | AMS → EZE | Jun 24, 19:29 UTC | Jun 25, 08:50 UTC | 13h 20m |
| 2026-06-24 | KLM862 | - | Jun 24, 03:29 UTC | Jun 24, 16:59 UTC | 13h 30m |
| 2026-06-23 | KLM861 | AMS → NRT | Jun 23, 12:25 UTC | Jun 24, 00:55 UTC | 12h 30m |
| 2026-06-22 | KLM702 | - | Jun 22, 18:15 UTC | Jun 23, 07:05 UTC | 12h 50m |
| 2026-06-22 | KLM702 | - | Jun 22, 15:40 UTC | Jun 22, 16:14 UTC | 35m |
| 2026-06-22 | KLM702 | - | Jun 22, 14:34 UTC | Jun 22, 14:45 UTC | 10m |
| 2026-06-22 | KLM701 | - | Jun 22, 10:49 UTC | Jun 22, 11:09 UTC | 20m |
| 2026-06-21 | KLM701 | - | Jun 21, 19:45 UTC | Jun 22, 08:50 UTC | 13h 5m |
| 2026-06-21 | KLM844 | - | Jun 21, 05:20 UTC | Jun 21, 16:54 UTC | 11h 35m |
| 2026-06-20 | KLM843 | - | Jun 20, 15:34 UTC | Jun 21, 02:04 UTC | 10h 30m |
| 2026-06-20 | KLM610 | SLC → AMS | Jun 20, 04:20 UTC | Jun 20, 13:09 UTC | 8h 50m |
| 2026-06-19 | KLM609 | AMS → SLC | Jun 19, 15:54 UTC | Jun 20, 01:19 UTC | 9h 25m |
| 2026-06-19 | KLM636 | - | Jun 19, 11:45 UTC | Jun 19, 13:20 UTC | 1h 35m |
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 PH-BQN page for operator, model, and routing details .