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 | A2A219 | N269TD | CESSNA 208 Caravan | 382 | 2026-05-30 |
| 2 | A7F31F | N611GV | CESSNA 208 Caravan | 371 | 2026-05-30 |
| 3 | A64208 | N502GV | CESSNA 208 Caravan | 301 | 2026-05-31 |
| 4 | A89076 | N651AE | EMBRAER ERJ-145 | 301 | 2026-05-30 |
| 5 | A90AAA | N682AE | EMBRAER ERJ-145 | 296 | 2026-05-31 |
| 6 | C055EC | C-GGNZ | DE HAVILLAND DHC-8-400 Dash 8 | 295 | 2026-05-30 |
| 7 | A8B8B9 | N661JA | EMBRAER ERJ-145 | 294 | 2026-05-31 |
| 8 | 7020AE | S2-STB | ATR-72-600 | 292 | 2026-05-30 |
| 9 | A915CF | N685AE | EMBRAER ERJ-145 | 289 | 2026-05-30 |
| 10 | 7020BC | S2-AKQ | ATR-72-600 | 287 | 2026-05-30 |
| 11 | C05EFD | C-GJZG | DE HAVILLAND DHC-8-400 Dash 8 | 286 | 2026-05-30 |
| 12 | 469934 | SX-FIT | ATR-72-600 | 284 | 2026-05-30 |
| 13 | A8A309 | N656AE | EMBRAER ERJ-145 | 281 | 2026-05-30 |
| 14 | A8FD2C | N679AE | EMBRAER ERJ-145 | 281 | 2026-05-31 |
| 15 | A91986 | N686AE | EMBRAER ERJ-145 | 280 | 2026-05-31 |
| 16 | C04850 | C-GBJZ | DE HAVILLAND DHC-8-400 Dash 8 | 280 | 2026-05-30 |
| 17 | C05ACC | C-GIJZ | DE HAVILLAND DHC-8-400 Dash 8 | 280 | 2026-05-31 |
| 18 | 45CAB6 | OY-RUV | ATR-72-600 | 279 | 2026-05-30 |
| 19 | C055E9 | C-GGNW | DE HAVILLAND DHC-8-400 Dash 8 | 279 | 2026-05-30 |
| 20 | ACED1C | N932AE | EMBRAER ERJ-145 | 278 | 2026-05-30 |
| 21 | C05512 | C-GGFP | DE HAVILLAND DHC-8-400 Dash 8 | 278 | 2026-05-31 |
| 22 | 4AAB15 | - | - | 276 | 2026-05-30 |
| 23 | A6147F | N491HA | BOEING 717-200 | 275 | 2026-05-31 |
| 24 | A88CBF | N650AE | EMBRAER ERJ-145 | 275 | 2026-05-30 |
| 25 | A8E6E2 | N673AE | EMBRAER ERJ-145 | 275 | 2026-05-30 |
| 26 | A944B9 | N697AB | EMBRAER ERJ-145 | 275 | 2026-05-30 |
| 27 | C055C9 | C-GGMQ | DE HAVILLAND DHC-8-400 Dash 8 | 275 | 2026-05-30 |
| 28 | A935E0 | N693AE | EMBRAER ERJ-145 | 274 | 2026-05-30 |
| 29 | A906F3 | N681AE | EMBRAER ERJ-145 | 273 | 2026-05-30 |
| 30 | A86540 | N640AE | EMBRAER ERJ-145 | 272 | 2026-05-31 |
| 31 | A8D6BD | N669MB | EMBRAER ERJ-145 | 272 | 2026-05-30 |
| 32 | A8DBBD | N670AE | EMBRAER ERJ-145 | 272 | 2026-05-30 |
| 33 | 46BC4A | SX-OBJ | ATR-72-600 | 271 | 2026-05-30 |
| 34 | A877D3 | N645AE | EMBRAER ERJ-145 | 271 | 2026-05-30 |
| 35 | A948A2 | N698CB | EMBRAER ERJ-145 | 271 | 2026-05-30 |
| 36 | ACB468 | N918AE | EMBRAER ERJ-145 | 271 | 2026-05-31 |
| 37 | ACC59D | N922AE | EMBRAER ERJ-145 | 271 | 2026-05-31 |
| 38 | 344307 | EC-LSQ | ATR-72-600 | 270 | 2026-05-30 |
| 39 | 4601FD | OH-ATP | ATR-72-500 | 270 | 2026-05-30 |
| 40 | A8AE2E | N659AE | EMBRAER ERJ-145 | 270 | 2026-05-31 |
| 41 | AA1DC2 | N751AB | - | 270 | 2026-05-30 |
| 42 | C055D2 | C-GGMZ | DE HAVILLAND DHC-8-400 Dash 8 | 270 | 2026-05-31 |
| 43 | A5FBDC | N485HA | BOEING 717-200 | 267 | 2026-05-31 |
| 44 | A61836 | N492HA | BOEING 717-200 | 267 | 2026-05-30 |
| 45 | AD11EB | N941LT | EMBRAER ERJ-145 | 267 | 2026-05-30 |
| 46 | C055C1 | C-GGMI | DE HAVILLAND DHC-8-400 Dash 8 | 267 | 2026-05-30 |
| 47 | A897E4 | N653AE | EMBRAER ERJ-145 | 265 | 2026-05-31 |
| 48 | 46BA85 | SX-NTE | ATR-72-600 | 264 | 2026-05-30 |
| 49 | 46BC55 | SX-OBU | ATR-72-600 | 264 | 2026-05-30 |
| 50 | 846A16 | JA14HC | ATR-42-600 | 264 | 2026-05-31 |
| 51 | 46CED4 | SX-SVT | ATR-72-600 | 263 | 2026-05-30 |
| 52 | A61BED | N493HA | BOEING 717-200 | 263 | 2026-05-31 |
| 53 | A912F0 | N684JW | EMBRAER ERJ-145 | 263 | 2026-05-30 |
| 54 | A93229 | N692AE | EMBRAER ERJ-145 | 262 | 2026-05-30 |
| 55 | AA60BB | N768RD | EMBRAER ERJ-170-100 | 262 | 2026-05-30 |
| 56 | 46BC54 | SX-OBT | - | 261 | 2026-05-30 |
| 57 | A60701 | N488HA | BOEING 717-200 | 261 | 2026-05-30 |
| 58 | 846682 | JA13HC | ATR-42-600 | 260 | 2026-05-31 |
| 59 | AC857B | N906AE | EMBRAER ERJ-145 | 260 | 2026-05-31 |
| 60 | C05F08 | C-GJZR | DE HAVILLAND DHC-8-400 Dash 8 | 260 | 2026-05-31 |
| 61 | 46D1CF | SX-TNO | ATR-72-600 | 259 | 2026-05-30 |
| 62 | A8C6E8 | N665BC | EMBRAER ERJ-145 | 259 | 2026-05-31 |
| 63 | 46A60F | SK-IPO | ATR-72-600 | 258 | 2026-05-30 |
| 64 | A817B1 | N620QX | EMBRAER ERJ-170-200 (long wing) | 258 | 2026-05-31 |
| 65 | A87942 | N645QX | EMBRAER ERJ-170-200 (long wing) | 258 | 2026-05-31 |
| 66 | A94C2A | N699AE | EMBRAER ERJ-145 | 258 | 2026-05-31 |
| 67 | ACF1A3 | N933JN | EMBRAER ERJ-145 | 258 | 2026-05-30 |
| 68 | A5D814 | N476HA | BOEING 717-200 | 257 | 2026-05-31 |
| 69 | A610C8 | N490HA | BOEING 717-200 | 257 | 2026-05-31 |
| 70 | A887FD | N649PP | EMBRAER ERJ-145 | 257 | 2026-05-31 |
| 71 | A8E32B | N672AE | EMBRAER ERJ-145 | 257 | 2026-05-30 |
| 72 | AA01B3 | N744DB | - | 256 | 2026-05-30 |
| 73 | A5DF82 | N478HA | BOEING 717-200 | 255 | 2026-05-31 |
| 74 | A9250D | N689EC | EMBRAER ERJ-145 | 255 | 2026-05-31 |
| 75 | AC6F31 | N900AE | EMBRAER ERJ-145 | 255 | 2026-05-30 |
| 76 | 4601FB | OH-ATN | ATR-72-500 | 254 | 2026-05-30 |
| 77 | AA1A26 | N750BD | - | 254 | 2026-05-30 |
| 78 | AA4953 | N762DT | EMBRAER ERJ-170-100 | 254 | 2026-05-30 |
| 79 | 46BC49 | SX-OBI | ATR-72-600 | 253 | 2026-05-30 |
| 80 | 8462EE | JA12HC | ATR-42-600 | 253 | 2026-05-30 |
| 81 | A87F41 | N647AE | EMBRAER ERJ-145 | 253 | 2026-05-31 |
| 82 | AABC11 | N791DK | - | 253 | 2026-05-30 |
| 83 | 4601FA | OH-ATM | ATR-72-500 | 252 | 2026-05-30 |
| 84 | 89913A | B-17013 | ATR-72-600 | 252 | 2026-05-31 |
| 85 | A6034A | N487HA | BOEING 717-200 | 252 | 2026-05-31 |
| 86 | A8C840 | N665QX | - | 252 | 2026-05-31 |
| 87 | A93997 | N694AE | EMBRAER ERJ-145 | 252 | 2026-05-31 |
| 88 | 4601FC | OH-ATO | ATR-72-500 | 251 | 2026-05-30 |
| 89 | 46D2F2 | SX-TWR | ATR-72-600 | 251 | 2026-05-30 |
| 90 | 89913B | B-17015 | ATR-72-600 | 251 | 2026-05-31 |
| 91 | 89913D | B-17017 | ATR-72-600 | 251 | 2026-05-31 |
| 92 | A86CAE | N642AE | EMBRAER ERJ-145 | 251 | 2026-05-30 |
| 93 | AC8932 | N907AE | EMBRAER ERJ-145 | 251 | 2026-05-30 |
| 94 | AD6D03 | N964WN | BOEING 737-700 | 251 | 2026-05-31 |
| 95 | C03A20 | C-FWAH | DE HAVILLAND DHC-6 Twin Otter | 251 | 2026-05-30 |
| 96 | C05F0E | C-GJZX | DE HAVILLAND DHC-8-400 Dash 8 | 251 | 2026-05-30 |
| 97 | 46D0AD | SX-TEM | ATR-72-600 | 250 | 2026-05-30 |
| 98 | 899146 | B-17011 | ATR-72-600 | 250 | 2026-05-31 |
| 99 | A9FA9E | N742GR | - | 250 | 2026-05-30 |
| 100 | AA11C9 | N748RR | - | 250 | 2026-05-30 |
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.