sensors Mode-S transponder
ABCDA2
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N86MS · GULFSTREAM 4 · operated by AB JET CO II LLC
- Hex
- ABCDA2
- Octal
- 52746642
- Decimal
- 11,259,298
- Country
- US
- Tail
- N86MS
- Type
- GLF4
- Flights observed
- 18
- Distinct callsigns
- 16
- Country
- US
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address ABCDA2 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 16 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| BLK176 | - | 2 | 2026-06-27 |
| BLK170 | - | 2 | 2026-06-26 |
| JNY86 | - | 1 | 2026-04-16 |
| BLK9019 | Westcoast Energy | 1 | 2026-05-18 |
| BLK9003 | Westcoast Energy | 1 | 2026-06-04 |
| BLK2987 | - | 1 | 2026-06-22 |
| BLK2276 | - | 1 | 2026-06-18 |
| BLK2260 | - | 1 | 2026-06-24 |
| BLK2259 | - | 1 | 2026-06-23 |
| BLK2250 | - | 1 | 2026-06-18 |
| BLK2245 | - | 1 | 2026-06-12 |
| BLK2244 | - | 1 | 2026-06-13 |
| BLK2240 | - | 1 | 2026-06-17 |
| BLK2239 | - | 1 | 2026-06-15 |
| BLK179 | - | 1 | 2026-06-28 |
| BLK111 | - | 1 | 2026-06-25 |
Recent flights last 18
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-28 | BLK179 | - | Jun 28, 16:19 UTC | Jun 28, 19:40 UTC | 3h 20m |
| 2026-06-27 | BLK176 | - | Jun 27, 12:25 UTC | Jun 27, 16:24 UTC | 4h 0m |
| 2026-06-26 | BLK170 | - | Jun 26, 16:05 UTC | Jun 26, 20:34 UTC | 4h 30m |
| 2026-06-25 | BLK111 | - | Jun 25, 18:55 UTC | Jun 25, 20:30 UTC | 1h 35m |
| 2026-06-25 | BLK176 | - | Jun 25, 12:44 UTC | Jun 25, 16:50 UTC | 4h 5m |
| 2026-06-24 | BLK2260 | - | Jun 24, 01:55 UTC | Jun 24, 02:49 UTC | 55m |
| 2026-06-23 | BLK2259 | JFK → YYZ | Jun 23, 15:55 UTC | Jun 23, 16:54 UTC | 1h 0m |
| 2026-06-22 | BLK2987 | - | Jun 22, 23:35 UTC | Jun 23, 00:09 UTC | 35m |
| 2026-06-22 | BLK170 | - | Jun 22, 15:50 UTC | Jun 22, 20:49 UTC | 5h 0m |
| 2026-06-18 | BLK2250 | - | Jun 18, 21:55 UTC | Jun 18, 22:20 UTC | 25m |
| 2026-06-18 | BLK2276 | - | Jun 18, 18:40 UTC | Jun 18, 19:00 UTC | 20m |
| 2026-06-17 | BLK2240 | COE → VNY | Jun 17, 18:05 UTC | Jun 17, 20:05 UTC | 2h 0m |
| 2026-06-15 | BLK2239 | VNY → COE | Jun 15, 15:25 UTC | Jun 15, 17:30 UTC | 2h 5m |
| 2026-06-13 | BLK2244 | - | Jun 13, 23:25 UTC | Jun 14, 00:15 UTC | 50m |
| 2026-06-12 | BLK2245 | - | Jun 12, 17:55 UTC | Jun 12, 18:50 UTC | 55m |
| 2026-06-04 | BLK9003 | ABE → MDT | Jun 4, 01:20 UTC | Jun 4, 01:35 UTC | 15m |
| 2026-05-18 | BLK9019 | ABE → CNO | May 18, 19:30 UTC | May 19, 00:40 UTC | 5h 10m |
| 2026-04-16 | JNY86 | ABE → ABE | Apr 16, 17:05 UTC | Apr 16, 17:10 UTC | 5m |
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 N86MS page for operator, model, and routing details .