sensors Transponder directory
Mode-S transponder codes
Each aircraft broadcasts a permanent 24-bit hex address assigned by its country of registration. Browse the most-broadcast transponders in the last 30 days.
| # | Mode-S | Registration | Type | Broadcasts | Last seen |
|---|---|---|---|---|---|
| 1 | A64208 | N502GV | CESSNA 208 Caravan | 355 | 2026-05-14 |
| 2 | 7020AE | S2-STB | ATR-72-600 | 304 | 2026-05-17 |
| 3 | 7020BC | S2-AKQ | ATR-72-600 | 299 | 2026-05-17 |
| 4 | 469934 | SX-FIT | ATR-72-600 | 292 | 2026-05-17 |
| 5 | 344307 | EC-LSQ | ATR-72-600 | 291 | 2026-05-17 |
| 6 | A8C6E8 | N665BC | EMBRAER ERJ-145 | 290 | 2026-05-16 |
| 7 | A8D6BD | N669MB | EMBRAER ERJ-145 | 289 | 2026-05-17 |
| 8 | A906F3 | N681AE | EMBRAER ERJ-145 | 289 | 2026-05-17 |
| 9 | A8FD2C | N679AE | EMBRAER ERJ-145 | 288 | 2026-05-17 |
| 10 | A88CBF | N650AE | EMBRAER ERJ-145 | 287 | 2026-05-17 |
| 11 | A935E0 | N693AE | EMBRAER ERJ-145 | 286 | 2026-05-17 |
| 12 | 46CED4 | SX-SVT | ATR-72-600 | 284 | 2026-05-17 |
| 13 | A948A2 | N698CB | EMBRAER ERJ-145 | 284 | 2026-05-17 |
| 14 | A8A309 | N656AE | EMBRAER ERJ-145 | 283 | 2026-05-17 |
| 15 | A87F41 | N647AE | EMBRAER ERJ-145 | 280 | 2026-05-17 |
| 16 | ACED1C | N932AE | EMBRAER ERJ-145 | 279 | 2026-05-17 |
| 17 | A61836 | N492HA | BOEING 717-200 | 278 | 2026-05-17 |
| 18 | A91986 | N686AE | EMBRAER ERJ-145 | 278 | 2026-05-17 |
| 19 | A877D3 | N645AE | EMBRAER ERJ-145 | 277 | 2026-05-17 |
| 20 | 45CAB6 | OY-RUV | ATR-72-600 | 276 | 2026-05-17 |
| 21 | A8DBBD | N670AE | EMBRAER ERJ-145 | 276 | 2026-05-17 |
| 22 | C055E9 | C-GGNW | DE HAVILLAND DHC-8-400 Dash 8 | 276 | 2026-05-17 |
| 23 | 4601F2 | OH-ATE | ATR-72-500 | 275 | 2026-05-17 |
| 24 | 4601FB | OH-ATN | ATR-72-500 | 275 | 2026-05-17 |
| 25 | A8E6E2 | N673AE | EMBRAER ERJ-145 | 275 | 2026-05-17 |
| 26 | A8FEB8 | N679SA | BOMBARDIER Regional Jet CRJ-200 | 274 | 2026-05-17 |
| 27 | A7F31F | N611GV | CESSNA 208 Caravan | 273 | 2026-05-16 |
| 28 | 46BC54 | SX-OBT | - | 272 | 2026-05-17 |
| 29 | A6034A | N487HA | BOEING 717-200 | 272 | 2026-05-17 |
| 30 | A61BED | N493HA | BOEING 717-200 | 272 | 2026-05-17 |
| 31 | 8462EE | JA12HC | ATR-42-600 | 271 | 2026-05-17 |
| 32 | A8AE2E | N659AE | EMBRAER ERJ-145 | 271 | 2026-05-17 |
| 33 | ACB468 | N918AE | EMBRAER ERJ-145 | 271 | 2026-05-16 |
| 34 | AD11EB | N941LT | EMBRAER ERJ-145 | 271 | 2026-05-17 |
| 35 | 4601FC | OH-ATO | ATR-72-500 | 270 | 2026-05-17 |
| 36 | 46A60F | SK-IPO | ATR-72-600 | 270 | 2026-05-17 |
| 37 | A93997 | N694AE | EMBRAER ERJ-145 | 270 | 2026-05-17 |
| 38 | 4601FD | OH-ATP | ATR-72-500 | 269 | 2026-05-17 |
| 39 | A60701 | N488HA | BOEING 717-200 | 269 | 2026-05-17 |
| 40 | A90AAA | N682AE | EMBRAER ERJ-145 | 269 | 2026-05-17 |
| 41 | A915CF | N685AE | EMBRAER ERJ-145 | 269 | 2026-05-17 |
| 42 | ACEBBE | N9310F | CESSNA 208 Caravan | 269 | 2026-05-17 |
| 43 | 46BC4E | SX-OBN | ATR-72-600 | 267 | 2026-05-17 |
| 44 | A5E949 | N480HA | BOEING 717-200 | 267 | 2026-05-17 |
| 45 | A9250D | N689EC | EMBRAER ERJ-145 | 267 | 2026-05-17 |
| 46 | A91E11 | N687JS | EMBRAER ERJ-145 | 266 | 2026-05-17 |
| 47 | A944B9 | N697AB | EMBRAER ERJ-145 | 266 | 2026-05-17 |
| 48 | AC857B | N906AE | EMBRAER ERJ-145 | 266 | 2026-05-16 |
| 49 | C055EC | C-GGNZ | DE HAVILLAND DHC-8-400 Dash 8 | 266 | 2026-05-17 |
| 50 | A895B0 | N652RS | EMBRAER ERJ-145 | 265 | 2026-05-17 |
| 51 | A897E4 | N653AE | EMBRAER ERJ-145 | 265 | 2026-05-17 |
| 52 | A8F5BE | N677AE | EMBRAER ERJ-145 | 265 | 2026-05-17 |
| 53 | A5DF82 | N478HA | BOEING 717-200 | 264 | 2026-05-17 |
| 54 | 8A0A3E | PK-TLG | AIRBUS A-321 | 263 | 2026-05-17 |
| 55 | A8E32B | N672AE | EMBRAER ERJ-145 | 263 | 2026-05-17 |
| 56 | AA883E | N778RH | EMBRAER ERJ-170-100 | 263 | 2026-05-17 |
| 57 | 846A16 | JA14HC | ATR-42-600 | 262 | 2026-05-17 |
| 58 | 89913D | B-17017 | ATR-72-600 | 262 | 2026-05-17 |
| 59 | A5D814 | N476HA | BOEING 717-200 | 262 | 2026-05-17 |
| 60 | A8C439 | N664MS | EMBRAER ERJ-145 | 262 | 2026-05-16 |
| 61 | C04850 | C-GBJZ | DE HAVILLAND DHC-8-400 Dash 8 | 262 | 2026-05-17 |
| 62 | C055C9 | C-GGMQ | DE HAVILLAND DHC-8-400 Dash 8 | 262 | 2026-05-17 |
| 63 | C055EB | C-GGNY | DE HAVILLAND DHC-8-400 Dash 8 | 262 | 2026-05-16 |
| 64 | 46D0AD | SX-TEM | ATR-72-600 | 261 | 2026-05-17 |
| 65 | 46D2F2 | SX-TWR | ATR-72-600 | 261 | 2026-05-17 |
| 66 | 8990F6 | B-16865 | ATR-72-600 | 261 | 2026-05-17 |
| 67 | A8B8B9 | N661JA | EMBRAER ERJ-145 | 261 | 2026-05-17 |
| 68 | AA1A26 | N750BD | - | 261 | 2026-05-17 |
| 69 | AA2A7F | N754SK | BOMBARDIER Regional Jet CRJ-700 | 261 | 2026-05-17 |
| 70 | 46BC52 | SX-OBR | ATR-72-600 | 260 | 2026-05-17 |
| 71 | 46BC55 | SX-OBU | ATR-72-600 | 260 | 2026-05-17 |
| 72 | 899138 | B-17012 | ATR-72-600 | 260 | 2026-05-17 |
| 73 | A86A66 | N641QX | EMBRAER ERJ-170-200 (long wing) | 260 | 2026-05-17 |
| 74 | 347253 | EC-NSR | AGUSTA AW-139 | 259 | 2026-05-15 |
| 75 | 4AAB15 | - | - | 259 | 2026-05-17 |
| 76 | 89914C | B-16857 | ATR-72-600 | 259 | 2026-05-17 |
| 77 | AA9FBB | N784DP | - | 259 | 2026-05-17 |
| 78 | 46D0C9 | SX-TFI | ATR-72-600 | 258 | 2026-05-17 |
| 79 | ACC59D | N922AE | EMBRAER ERJ-145 | 258 | 2026-05-17 |
| 80 | A6D36D | N539SA | - | 257 | 2026-05-17 |
| 81 | A8540B | N636AE | EMBRAER ERJ-145 | 257 | 2026-05-17 |
| 82 | AA1DC2 | N751AB | - | 257 | 2026-05-17 |
| 83 | C055C1 | C-GGMI | DE HAVILLAND DHC-8-400 Dash 8 | 257 | 2026-05-16 |
| 84 | 8008C2 | VT-ITN | AIRBUS A-320neo | 256 | 2026-05-16 |
| 85 | A8ABE6 | N658QX | - | 255 | 2026-05-17 |
| 86 | ACC954 | N923AE | EMBRAER ERJ-145 | 255 | 2026-05-17 |
| 87 | ACF1A3 | N933JN | EMBRAER ERJ-145 | 255 | 2026-05-16 |
| 88 | ACF841 | N935AE | EMBRAER ERJ-145 | 255 | 2026-05-17 |
| 89 | A5FF93 | N486HA | BOEING 717-200 | 254 | 2026-05-17 |
| 90 | A83F30 | N630QX | EMBRAER ERJ-170-200 (long wing) | 254 | 2026-05-17 |
| 91 | A8AA77 | N658AE | EMBRAER ERJ-145 | 254 | 2026-05-17 |
| 92 | 4601F9 | OH-ATL | ATR-72-500 | 253 | 2026-05-17 |
| 93 | A8741C | N644AE | EMBRAER ERJ-145 | 253 | 2026-05-17 |
| 94 | A93D4E | N695AE | EMBRAER ERJ-145 | 253 | 2026-05-16 |
| 95 | AA11C9 | N748RR | - | 253 | 2026-05-17 |
| 96 | AA55BD | N765ST | - | 253 | 2026-05-17 |
| 97 | AA9CA8 | N783LC | - | 252 | 2026-05-17 |
| 98 | ACD0C2 | N925AE | EMBRAER ERJ-145 | 252 | 2026-05-17 |
| 99 | 71C578 | HL8578 | BOEING 737-800 | 251 | 2026-05-17 |
| 100 | 8990F1 | B-16821 | ATR-72-600 | 251 | 2026-05-17 |
What is a Mode-S transponder code?
A Mode-S transponder code, also known as an ICAO 24-bit address or hex code, is a permanent identifier broadcast by every aircraft equipped with an ADS-B or Mode-S transponder. The code is assigned by the country where the aircraft is first registered, from blocks defined in ICAO Annex 10 Volume III.
Unlike a callsign (which changes per flight) or a registration (which can change if an aircraft is sold to an operator in another country), the Mode-S code stays with the airframe for the duration of its registration in a given country. Flight trackers use it as the canonical identifier for position reports, callsign history, and ownership correlation.