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 Jul 26, 22:15 UTC
- Flights observed
- 407
- Distinct callsigns
- 20
- Country
- -
- Last broadcast
- Jul 26, 22:15 UTC
Last known position
Callsign history 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| ICE7K | Icelandair | 11 | 2026-07-25 |
| ICE1A | Icelandair | 10 | 2026-07-24 |
| ICE18L | Icelandair | 10 | 2026-07-26 |
| ICE11P | - | 9 | 2026-07-06 |
| ICE533 | - | 8 | 2026-07-17 |
| ICE532 | - | 8 | 2026-07-17 |
| ICE473 | - | 8 | 2026-07-01 |
| ICE83P | - | 7 | 2026-07-08 |
| ICE680 | Icelandair | 7 | 2026-07-18 |
| ICE472 | - | 7 | 2026-07-01 |
| ICE2B | Icelandair | 7 | 2026-07-25 |
| ICE656 | - | 6 | 2026-07-14 |
| ICE521 | - | 6 | 2026-07-09 |
| ICE43E | Icelandair | 6 | 2026-07-21 |
| ICE830 | - | 5 | 2026-07-09 |
| ICE76V | - | 5 | 2026-07-16 |
| ICE75T | - | 5 | 2026-07-16 |
| ICE74A | - | 5 | 2026-06-24 |
| ICE694 | - | 5 | 2026-07-18 |
| ICE657 | - | 5 | 2026-07-13 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | ICE37B | KEF → YYZ | Jul 26, 17:25 UTC | Jul 26, 22:15 UTC | 4h 50m |
| 2026-07-26 | ICE431 | GLA → KEF | Jul 26, 13:40 UTC | Jul 26, 15:45 UTC | 2h 5m |
| 2026-07-26 | ICE432 | KEF → GLA | Jul 26, 10:35 UTC | Jul 26, 12:15 UTC | 1h 40m |
| 2026-07-26 | ICE18L | BOS → KEF | Jul 26, 03:35 UTC | Jul 26, 08:15 UTC | 4h 41m |
| 2026-07-25 | ICE7K | KEF → BOS | Jul 25, 23:50 UTC | Jul 26, 01:40 UTC | 1h 50m |
| 2026-07-25 | ICE7K | KEF → BOS | Jul 25, 20:35 UTC | Jul 25, 20:50 UTC | 15m |
| 2026-07-25 | ICE21V | MXP → KEF | Jul 25, 14:50 UTC | Jul 25, 18:55 UTC | 4h 5m |
| 2026-07-25 | ICE22M | KEF → MXP | Jul 25, 09:45 UTC | Jul 25, 13:00 UTC | 3h 15m |
| 2026-07-25 | ICE2B | IAD → KEF | Jul 25, 00:50 UTC | Jul 25, 05:50 UTC | 5h 0m |
| 2026-07-24 | ICE1A | KEF → IAD | Jul 24, 17:20 UTC | Jul 24, 23:20 UTC | 6h 0m |
| 2026-07-24 | ICE35E | EDI → KEF | Jul 24, 13:35 UTC | Jul 24, 15:35 UTC | 2h 0m |
| 2026-07-24 | ICE34E | KEF → EDI | Jul 24, 10:20 UTC | Jul 24, 12:15 UTC | 1h 55m |
| 2026-07-24 | ICE56K | JFK → KEF | Jul 24, 04:10 UTC | Jul 24, 08:45 UTC | 4h 35m |
| 2026-07-23 | ICE55L | KEF → JFK | Jul 23, 20:15 UTC | Jul 24, 02:10 UTC | 5h 55m |
| 2026-07-23 | ICE99K | CPH → KEF | Jul 23, 15:10 UTC | Jul 23, 18:20 UTC | 3h 10m |
| 2026-07-23 | ICE98C | KEF → CPH | Jul 23, 11:10 UTC | Jul 23, 13:40 UTC | 2h 30m |
| 2026-07-23 | ICE648 | IAD → KEF | Jul 23, 04:20 UTC | Jul 23, 09:10 UTC | 4h 50m |
| 2026-07-22 | ICE649 | KEF → IAD | Jul 22, 20:20 UTC | Jul 23, 02:55 UTC | 6h 35m |
| 2026-07-22 | ICE597 | BCN → KEF | Jul 22, 15:10 UTC | Jul 22, 19:00 UTC | 3h 50m |
| 2026-07-22 | ICE596 | KEF → BCN | Jul 22, 02:35 UTC | Jul 22, 13:35 UTC | 11h 0m |
| 2026-07-21 | ICE43E | KEF → BWI | Jul 21, 17:30 UTC | Jul 21, 23:55 UTC | 6h 25m |
| 2026-07-21 | ICE565 | GVA → KEF | Jul 21, 12:15 UTC | Jul 21, 16:05 UTC | 3h 50m |
| 2026-07-21 | ICE564 | KEF → GVA | Jul 21, 07:35 UTC | Jul 21, 10:50 UTC | 3h 15m |
| 2026-07-20 | ICE345 | HEL → KEF | Jul 20, 20:40 UTC | Jul 21, 00:10 UTC | 3h 30m |
| 2026-07-20 | ICE344 | KEF → HEL | Jul 20, 16:20 UTC | Jul 20, 19:15 UTC | 2h 55m |
| 2026-07-20 | ICE29E | MAN → KEF | Jul 20, 12:45 UTC | Jul 20, 15:10 UTC | 2h 25m |
| 2026-07-20 | ICE28T | - | Jul 20, 08:30 UTC | Jul 20, 10:45 UTC | 2h 15m |
| 2026-07-20 | ICE2B | IAD → KEF | Jul 20, 01:40 UTC | Jul 20, 07:10 UTC | 5h 30m |
| 2026-07-19 | ICE1A | KEF → IAD | Jul 19, 17:30 UTC | Jul 19, 23:40 UTC | 6h 10m |
| 2026-07-19 | ICE431 | GLA → KEF | Jul 19, 13:40 UTC | Jul 19, 16:00 UTC | 2h 20m |
| 2026-07-19 | ICE432 | KEF → GLA | Jul 19, 10:35 UTC | Jul 19, 12:20 UTC | 1h 45m |
| 2026-07-18 | ICE680 | SEA → KEF | Jul 18, 23:00 UTC | Jul 19, 05:50 UTC | 6h 50m |
| 2026-07-18 | ICE685 | - | Jul 18, 10:50 UTC | Jul 18, 18:20 UTC | 7h 30m |
| 2026-07-18 | ICE694 | - | Jul 18, 09:00 UTC | Jul 18, 09:20 UTC | 20m |
| 2026-07-18 | ICE694 | - | Jul 18, 02:40 UTC | Jul 18, 07:10 UTC | 4h 31m |
| 2026-07-17 | ICE45R | KEF → YVR | Jul 17, 17:44 UTC | Jul 18, 01:00 UTC | 7h 15m |
| 2026-07-17 | ICE533 | MUC → KEF | Jul 17, 12:40 UTC | Jul 17, 16:19 UTC | 3h 40m |
| 2026-07-17 | ICE532 | KEF → MUC | Jul 17, 07:35 UTC | Jul 17, 11:04 UTC | 3h 30m |
| 2026-07-17 | ICE606 | - | Jul 17, 04:20 UTC | Jul 17, 04:35 UTC | 15m |
| 2026-07-17 | ICE606 | - | Jul 17, 00:45 UTC | Jul 17, 01:15 UTC | 30m |
| 2026-07-16 | ICE607 | - | Jul 16, 18:50 UTC | Jul 16, 23:10 UTC | 4h 20m |
| 2026-07-16 | ICE75T | - | Jul 16, 15:05 UTC | Jul 16, 17:35 UTC | 2h 30m |
| 2026-07-16 | ICE76V | KEF → OSL | Jul 16, 10:59 UTC | Jul 16, 13:15 UTC | 2h 15m |
| 2026-07-16 | ICE694 | YVR → KEF | Jul 16, 02:55 UTC | Jul 16, 09:30 UTC | 6h 35m |
| 2026-07-15 | ICE45R | - | Jul 15, 17:45 UTC | Jul 16, 01:05 UTC | 7h 20m |
| 2026-07-15 | ICE9L | ZRH → KEF | Jul 15, 12:50 UTC | Jul 15, 16:30 UTC | 3h 40m |
| 2026-07-15 | ICE12C | KEF → ZRH | Jul 15, 08:00 UTC | Jul 15, 11:30 UTC | 3h 30m |
| 2026-07-14 | ICE50G | - | Jul 14, 22:50 UTC | Jul 15, 05:35 UTC | 6h 45m |
| 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 |
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 Jul 26, 22:15 UTC.
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.