sensors Mode-S transponder
4CC549
ICAO 24-bit transponder address
Currently assigned to TF-ICS · BOEING 737 MAX 8
- Hex
- 4CC549
- Octal
- 23142511
- Decimal
- 5,031,241
- Tail
- TF-ICS
- Type
- B38M
No current signal · last broadcast 2h ago
- Flights observed
- 360
- Distinct callsigns
- 20
- Country
- -
- Last broadcast
- 2h ago
Last known position
Callsign history 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| ICE7K | - | 9 | 2026-07-05 |
| ICE18L | - | 9 | 2026-07-05 |
| ICE11P | - | 9 | 2026-07-06 |
| ICE473 | - | 8 | 2026-07-01 |
| ICE1A | - | 8 | 2026-07-12 |
| ICE83P | - | 7 | 2026-07-08 |
| ICE533 | - | 7 | 2026-06-23 |
| ICE532 | - | 7 | 2026-06-23 |
| ICE472 | - | 7 | 2026-07-01 |
| ICE680 | - | 6 | 2026-06-16 |
| ICE656 | - | 6 | 2026-07-14 |
| ICE521 | - | 6 | 2026-07-09 |
| ICE830 | - | 5 | 2026-07-09 |
| ICE74A | - | 5 | 2026-06-24 |
| ICE657 | - | 5 | 2026-07-13 |
| ICE605 | - | 5 | 2026-06-19 |
| ICE520 | - | 5 | 2026-07-09 |
| ICE43E | - | 5 | 2026-06-21 |
| ICE38C | - | 5 | 2026-06-30 |
| ICE2B | - | 5 | 2026-07-13 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | ICE50G | - | Jul 14, 22:50 UTC | Jul 15, 00:05 UTC | 1h 15m |
| 2026-07-14 | ICE695 | - | Jul 14, 10:40 UTC | Jul 14, 18:10 UTC | 7h 30m |
| 2026-07-14 | ICE656 | - | Jul 14, 05:45 UTC | Jul 14, 06:05 UTC | 20m |
| 2026-07-14 | ICE656 | - | Jul 14, 00:30 UTC | Jul 14, 01:25 UTC | 55m |
| 2026-07-13 | ICE657 | - | Jul 13, 17:05 UTC | Jul 13, 23:15 UTC | 6h 10m |
| 2026-07-13 | ICE29E | MAN → KEF | Jul 13, 13:20 UTC | Jul 13, 15:40 UTC | 2h 20m |
| 2026-07-13 | ICE28T | KEF → MAN | Jul 13, 08:15 UTC | Jul 13, 10:35 UTC | 2h 20m |
| 2026-07-13 | ICE2B | IAD → KEF | Jul 13, 00:40 UTC | Jul 13, 06:05 UTC | 5h 25m |
| 2026-07-12 | ICE1A | - | Jul 12, 17:20 UTC | Jul 12, 23:10 UTC | 5h 50m |
| 2026-07-12 | ICE15M | BER → KEF | Jul 12, 12:25 UTC | Jul 12, 15:50 UTC | 3h 25m |
| 2026-07-12 | ICE14T | KEF → BER | Jul 12, 07:45 UTC | Jul 12, 10:55 UTC | 3h 10m |
| 2026-07-11 | ICE83C | ARN → KEF | Jul 11, 23:05 UTC | Jul 12, 02:05 UTC | 3h 0m |
| 2026-07-11 | ICE82B | KEF → ARN | Jul 11, 19:15 UTC | Jul 11, 22:01 UTC | 2h 45m |
| 2026-07-11 | ICE75T | OSL → KEF | Jul 11, 15:30 UTC | Jul 11, 18:10 UTC | 2h 40m |
| 2026-07-11 | ICE76V | KEF → OSL | Jul 11, 11:20 UTC | Jul 11, 13:40 UTC | 2h 20m |
| 2026-07-11 | ICE201 | - | Jul 11, 05:31 UTC | Jul 11, 08:30 UTC | 3h 0m |
| 2026-07-11 | ICE202 | - | Jul 11, 01:30 UTC | Jul 11, 04:05 UTC | 2h 35m |
| 2026-07-10 | ICE116 | KEF → KEF | Jul 10, 18:35 UTC | Jul 11, 00:10 UTC | 5h 35m |
| 2026-07-10 | ICE75T | - | Jul 10, 14:45 UTC | Jul 10, 17:10 UTC | 2h 25m |
| 2026-07-10 | ICE76V | KEF → OSL | Jul 10, 10:50 UTC | Jul 10, 13:05 UTC | 2h 15m |
| 2026-07-10 | ICE12E | SEA → KEF | Jul 10, 02:30 UTC | Jul 10, 09:15 UTC | 6h 45m |
| 2026-07-09 | ICE681 | KEF → SEA | Jul 9, 17:10 UTC | Jul 10, 00:40 UTC | 7h 30m |
| 2026-07-09 | ICE521 | FRA → KEF | Jul 9, 12:20 UTC | Jul 9, 15:30 UTC | 3h 10m |
| 2026-07-09 | ICE520 | KEF → FRA | Jul 9, 07:30 UTC | Jul 9, 10:45 UTC | 3h 15m |
| 2026-07-09 | ICE830 | - | Jul 9, 00:40 UTC | Jul 9, 06:00 UTC | 5h 20m |
| 2026-07-08 | ICE83P | - | Jul 8, 21:00 UTC | Jul 8, 23:10 UTC | 2h 10m |
| 2026-07-08 | ICE83P | - | Jul 8, 17:20 UTC | Jul 8, 17:35 UTC | 15m |
| 2026-07-08 | ICE15M | - | Jul 8, 12:25 UTC | Jul 8, 15:55 UTC | 3h 30m |
| 2026-07-08 | ICE14T | KEF → BER | Jul 8, 07:40 UTC | Jul 8, 10:40 UTC | 3h 0m |
| 2026-07-07 | ICE7LI | MXP → KEF | Jul 7, 21:25 UTC | Jul 8, 01:20 UTC | 3h 55m |
| 2026-07-07 | ICE6LC | - | Jul 7, 15:55 UTC | Jul 7, 19:30 UTC | 3h 35m |
| 2026-07-07 | ICE88E | SEA → KEF | Jul 7, 06:40 UTC | Jul 7, 13:40 UTC | 7h 0m |
| 2026-07-06 | ICE11P | - | Jul 6, 20:25 UTC | Jul 7, 03:50 UTC | 7h 25m |
| 2026-07-06 | ICE63L | - | Jul 6, 14:20 UTC | Jul 6, 19:00 UTC | 4h 40m |
| 2026-07-06 | ICE62L | - | Jul 6, 08:05 UTC | Jul 6, 12:10 UTC | 4h 5m |
| 2026-07-05 | ICE597 | BCN → KEF | Jul 5, 16:00 UTC | Jul 5, 20:10 UTC | 4h 10m |
| 2026-07-05 | ICE596 | KEF → BCN | Jul 5, 10:45 UTC | Jul 5, 14:25 UTC | 3h 40m |
| 2026-07-05 | ICE18L | - | Jul 5, 04:40 UTC | Jul 5, 08:15 UTC | 3h 35m |
| 2026-07-05 | ICE18L | - | Jul 5, 03:45 UTC | Jul 5, 04:35 UTC | 50m |
| 2026-07-05 | ICE7K | - | Jul 5, 00:20 UTC | Jul 5, 01:55 UTC | 1h 35m |
| 2026-07-04 | ICE7K | - | Jul 4, 20:35 UTC | Jul 4, 20:45 UTC | 10m |
| 2026-07-04 | ICE547 | - | Jul 4, 15:45 UTC | Jul 4, 19:05 UTC | 3h 20m |
| 2026-07-04 | ICE546 | KEF → CDG | Jul 4, 11:15 UTC | Jul 4, 14:00 UTC | 2h 45m |
| 2026-07-04 | ICE56K | JFK → KEF | Jul 4, 04:30 UTC | Jul 4, 09:20 UTC | 4h 50m |
| 2026-07-03 | ICE55L | KEF → JFK | Jul 3, 20:45 UTC | Jul 4, 02:20 UTC | 5h 35m |
| 2026-07-03 | ICE565 | GVA → KEF | Jul 3, 15:25 UTC | Jul 3, 19:10 UTC | 3h 45m |
| 2026-07-03 | ICE564 | - | Jul 3, 10:55 UTC | Jul 3, 14:05 UTC | 3h 10m |
| 2026-07-03 | ICE640 | BWI → KEF | Jul 3, 04:10 UTC | Jul 3, 09:25 UTC | 5h 15m |
| 2026-07-03 | ICE641 | KEF → BWI | Jul 3, 00:25 UTC | Jul 3, 02:35 UTC | 2h 10m |
| 2026-07-02 | ICE641 | KEF → BWI | Jul 2, 20:45 UTC | Jul 2, 20:55 UTC | 10m |
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 TF-ICS page for operator, model, and routing details .
Mode-S 4CC549 frequently asked
What is Mode-S code 4CC549?
4CC549 is an ICAO 24-bit transponder address. Assigned to TF-ICS.
Is 4CC549 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC549, octal 23142511, decimal 5,031,241.