sensors Mode-S transponder
AB04F9
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N809TD · EMBRAER EMB-135 Legacy · operated by AERO AIRCRAFT HOLDINGS II LLC
- Hex
- AB04F9
- Octal
- 52602371
- Decimal
- 11,207,929
- Country
- US
- Tail
- N809TD
- Type
- E35L
- Flights observed
- 97
- Distinct callsigns
- 20
- Country
- US
- Last broadcast
- Jul 26, 10:05 UTC
Last known position
Country allocation
The ICAO 24-bit address AB04F9 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 |
|---|---|---|---|
| BLK73 | Westcoast Energy | 3 | 2026-05-18 |
| BLK72 | Westcoast Energy | 3 | 2026-05-21 |
| BLK2124 | Westcoast Energy | 3 | 2026-04-15 |
| BLK70 | Westcoast Energy | 2 | 2026-06-01 |
| BLK2944 | Westcoast Energy | 2 | 2026-05-23 |
| BLK2142 | Westcoast Energy | 2 | 2026-04-17 |
| BLK2141 | - | 2 | 2026-04-16 |
| BLK9002 | - | 1 | 2026-07-16 |
| BLK9001 | - | 1 | 2026-07-15 |
| BLK71 | Westcoast Energy | 1 | 2026-05-28 |
| BLK491 | Westcoast Energy | 1 | 2026-05-04 |
| BLK2978 | Westcoast Energy | 1 | 2026-05-01 |
| BLK2976 | Westcoast Energy | 1 | 2026-05-26 |
| BLK2964 | Westcoast Energy | 1 | 2026-05-17 |
| BLK2963 | Westcoast Energy | 1 | 2026-05-29 |
| BLK2960 | Westcoast Energy | 1 | 2026-05-24 |
| BLK2959 | Westcoast Energy | 1 | 2026-04-24 |
| BLK2957 | Westcoast Energy | 1 | 2026-07-26 |
| BLK2956 | Westcoast Energy | 1 | 2026-07-25 |
| BLK2955 | Westcoast Energy | 1 | 2026-07-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | BLK2957 | TEB → BWI | Jul 26, 09:50 UTC | Jul 26, 10:05 UTC | 15m |
| 2026-07-26 | BLK2321 | MDW → LAX | Jul 26, 04:55 UTC | Jul 26, 08:50 UTC | 3h 56m |
| 2026-07-25 | BLK2956 | VNY → LAS | Jul 25, 22:40 UTC | Jul 26, 02:50 UTC | 4h 10m |
| 2026-07-24 | BLK2188 | MOT → VNY | Jul 24, 20:50 UTC | Jul 25, 08:45 UTC | 11h 55m |
| 2026-07-23 | BLK2914 | BLM → TEB | Jul 23, 05:00 UTC | Jul 23, 09:00 UTC | 4h 0m |
| 2026-07-22 | BLK2313 | LAX → MDW | Jul 22, 23:55 UTC | Jul 23, 03:40 UTC | 3h 45m |
| 2026-07-22 | BLK2955 | VNY → LAS | Jul 22, 21:35 UTC | Jul 22, 21:50 UTC | 15m |
| 2026-07-21 | BLK2902 | VNY → TRM | Jul 21, 01:40 UTC | Jul 21, 03:40 UTC | 2h 0m |
| 2026-07-20 | BLK2284 | VNY → DEN | Jul 20, 17:20 UTC | Jul 20, 19:25 UTC | 2h 5m |
| 2026-07-20 | BLK2308 | VNY → IAD | Jul 20, 00:10 UTC | Jul 20, 00:50 UTC | 40m |
| 2026-07-19 | BLK2912 | VNY → SLC | Jul 19, 20:45 UTC | Jul 19, 21:30 UTC | 45m |
| 2026-07-16 | BLK9002 | - | Jul 16, 03:25 UTC | Jul 16, 04:55 UTC | 1h 30m |
| 2026-07-15 | BLK9001 | - | Jul 15, 21:15 UTC | Jul 15, 22:00 UTC | 45m |
| 2026-06-14 | BLK118 | - | Jun 14, 21:20 UTC | Jun 14, 22:45 UTC | 1h 25m |
| 2026-06-13 | BLK2267 | - | Jun 13, 11:05 UTC | Jun 13, 15:25 UTC | 4h 20m |
| 2026-06-12 | BLK2253 | VNY → ORD | Jun 12, 19:55 UTC | Jun 12, 23:25 UTC | 3h 30m |
| 2026-06-11 | BLK0111 | - | Jun 11, 18:40 UTC | Jun 11, 20:25 UTC | 1h 45m |
| 2026-06-11 | BLK0176 | - | Jun 11, 12:45 UTC | Jun 11, 16:50 UTC | 4h 5m |
| 2026-06-10 | BLK0170 | VNY → TEB | Jun 10, 15:35 UTC | Jun 10, 21:05 UTC | 5h 30m |
| 2026-06-09 | BLK0171 | TEB → VNY | Jun 9, 14:25 UTC | Jun 9, 20:15 UTC | 5h 50m |
| 2026-06-07 | BLK2176 | YUL → TEB | Jun 7, 23:35 UTC | Jun 8, 00:35 UTC | 1h 0m |
| 2026-06-07 | BLK2169 | MDW → YUL | Jun 7, 05:15 UTC | Jun 7, 06:55 UTC | 1h 40m |
| 2026-06-06 | BLK2162 | LAS → MDW | Jun 6, 11:30 UTC | Jun 6, 14:45 UTC | 3h 15m |
| 2026-06-06 | BLK2153 | VNY → LAS | Jun 6, 06:55 UTC | Jun 6, 07:35 UTC | 40m |
| 2026-06-05 | BLK2948 | ONT → VNY | Jun 5, 05:55 UTC | Jun 5, 06:45 UTC | 50m |
| 2026-06-05 | BLK2160 | LGB → NUQ | Jun 5, 04:30 UTC | Jun 5, 05:25 UTC | 55m |
| 2026-06-05 | BLK2947 | VNY → ONT | Jun 5, 02:30 UTC | Jun 5, 02:45 UTC | 15m |
| 2026-06-04 | BLK171 | TEB → VNY | Jun 4, 19:55 UTC | Jun 5, 01:25 UTC | 5h 30m |
| 2026-06-04 | BLK2221 | SAT → TEB | Jun 4, 04:45 UTC | Jun 4, 08:15 UTC | 3h 30m |
| 2026-06-03 | BLK2220 | TEB → SAT | Jun 3, 16:45 UTC | Jun 3, 20:15 UTC | 3h 30m |
| 2026-06-01 | BLK70 | VNY → TEB | Jun 1, 15:45 UTC | Jun 1, 20:40 UTC | 4h 55m |
| 2026-05-31 | BLK2946 | BZN → VNY | May 31, 23:20 UTC | May 31, 23:30 UTC | 10m |
| 2026-05-31 | BLK2159 | NUQ → LGB | May 31, 21:20 UTC | May 31, 22:15 UTC | 55m |
| 2026-05-31 | BLK2945 | LAX → NUQ | May 31, 18:10 UTC | May 31, 19:05 UTC | 55m |
| 2026-05-30 | BLK2218 | SFO → LAX | May 30, 01:50 UTC | May 30, 02:45 UTC | 55m |
| 2026-05-29 | BLK2963 | SNA → VNY | May 29, 22:00 UTC | May 29, 23:20 UTC | 1h 20m |
| 2026-05-28 | BLK71 | TEB → VNY | May 28, 16:45 UTC | May 28, 22:30 UTC | 5h 45m |
| 2026-05-27 | BLK70 | VNY → TEB | May 27, 15:35 UTC | May 27, 20:45 UTC | 5h 10m |
| 2026-05-26 | BLK2976 | LAX → VNY | May 26, 00:39 UTC | May 26, 00:54 UTC | 15m |
| 2026-05-25 | BLK2228 | - | May 25, 21:09 UTC | May 26, 00:09 UTC | 3h 0m |
| 2026-05-25 | BLK2215 | - | May 25, 16:35 UTC | May 25, 19:54 UTC | 3h 19m |
| 2026-05-24 | BLK2960 | VNY → FAT | May 24, 20:00 UTC | May 24, 20:40 UTC | 40m |
| 2026-05-24 | BLK2210 | TYS → FOK | May 24, 02:05 UTC | May 24, 03:40 UTC | 1h 35m |
| 2026-05-23 | BLK2209 | PBI → TYS | May 23, 17:15 UTC | May 23, 18:55 UTC | 1h 40m |
| 2026-05-23 | BLK2944 | VNY → SNA | May 23, 02:20 UTC | May 23, 02:35 UTC | 14m |
| 2026-05-22 | BLK2203 | TEB → OPF | May 22, 00:00 UTC | May 22, 03:05 UTC | 3h 5m |
| 2026-05-21 | BLK72 | VNY → TEB | May 21, 15:10 UTC | May 21, 20:10 UTC | 5h 0m |
| 2026-05-20 | BLK2943 | OAK → VNY | May 20, 23:40 UTC | May 21, 00:00 UTC | 20m |
| 2026-05-20 | BLK2202 | HSH → ONT | May 20, 22:00 UTC | May 20, 22:40 UTC | 40m |
| 2026-05-19 | BLK2201 | ONT → HSH | May 19, 14:00 UTC | May 19, 14:50 UTC | 50m |
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 N809TD page for operator, model, and routing details .