Apparatus

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sensors Mode-S transponder

4CC577

ICAO 24-bit transponder address

Currently assigned to TF-ICH · BOEING 737 MAX 8

Hex
4CC577
Octal
23142567
Decimal
5,031,287
Tail
TF-ICH
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
185
Distinct callsigns
20
Country
-
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4CC577.

Callsign history 20 distinct

Callsign Airline Flights Last seen
ICE7K - 11 2026-06-23
ICE18L - 8 2026-06-23
ICE99K - 6 2026-06-21
ICE98C - 6 2026-06-21
ICE680 - 5 2026-06-27
ICE22M - 5 2026-06-28
ICE21V - 5 2026-06-28
ICE856 Icelandair 4 2026-05-26
ICE74A Icelandair 4 2026-06-10
ICE73P Icelandair 4 2026-06-10
ICE685 - 4 2026-06-27
ICE681 - 4 2026-06-19
ICE605 Icelandair 4 2026-06-12
ICE45R Icelandair 4 2026-05-27
ICE7EZ - 3 2026-06-23
ICE6EZ - 3 2026-06-23
ICE694 Icelandair 3 2026-05-28
ICE607 Icelandair 3 2026-06-14
ICE604 Icelandair 3 2026-06-12
ICE565 Icelandair 3 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-28 ICE21V - Jun 28, 16:55 UTCJun 28, 18:55 UTC2h 0m
2026-06-28 ICE22M KEF → MXP Jun 28, 09:25 UTCJun 28, 13:19 UTC3h 55m
2026-06-27 ICE680 - Jun 27, 23:04 UTCJun 28, 06:05 UTC7h 0m
2026-06-27 ICE685 - Jun 27, 13:00 UTCJun 27, 18:15 UTC5h 15m
2026-06-27 ICE830 PIT → KEF Jun 27, 00:44 UTCJun 27, 06:05 UTC5h 20m
2026-06-26 ICE83P KEF → PIT Jun 26, 17:29 UTCJun 26, 23:15 UTC5h 45m
2026-06-26 ICE56K JFK → KEF Jun 26, 04:34 UTCJun 26, 09:39 UTC5h 5m
2026-06-25 ICE55L KEF → JFK Jun 25, 21:10 UTCJun 26, 02:40 UTC5h 30m
2026-06-25 ICE597 BCN → KEF Jun 25, 15:40 UTCJun 25, 19:29 UTC3h 50m
2026-06-25 ICE596 KEF → BCN Jun 25, 08:45 UTCJun 25, 12:50 UTC4h 5m
2026-06-24 ICE680 SEA → KEF Jun 24, 23:04 UTCJun 25, 06:20 UTC7h 15m
2026-06-24 ICE685 - Jun 24, 10:59 UTCJun 24, 18:09 UTC7h 10m
2026-06-24 ICE201 CPH → KEF Jun 24, 05:29 UTCJun 24, 08:35 UTC3h 5m
2026-06-24 ICE202 KEF → CPH Jun 24, 01:19 UTCJun 24, 03:55 UTC2h 35m
2026-06-23 ICE7EZ - Jun 23, 15:24 UTCJun 23, 18:20 UTC2h 55m
2026-06-23 ICE6EZ KEF → AMS Jun 23, 11:10 UTCJun 23, 13:45 UTC2h 35m
2026-06-23 ICE18L BOS → KEF Jun 23, 03:39 UTCJun 23, 08:20 UTC4h 40m
2026-06-23 ICE7K - Jun 23, 00:04 UTCJun 23, 01:20 UTC1h 15m
2026-06-22 ICE7K - Jun 22, 23:45 UTCJun 23, 00:00 UTC15m
2026-06-22 ICE7K - Jun 22, 20:10 UTCJun 22, 20:19 UTC10m
2026-06-22 ICE21V MXP → KEF Jun 22, 14:55 UTCJun 22, 18:44 UTC3h 50m
2026-06-22 ICE22M - Jun 22, 09:14 UTCJun 22, 12:49 UTC3h 35m
2026-06-22 ICE18L BOS → KEF Jun 22, 03:10 UTCJun 22, 07:49 UTC4h 40m
2026-06-21 ICE7K - Jun 21, 23:59 UTCJun 22, 01:19 UTC1h 20m
2026-06-21 ICE7K - Jun 21, 20:24 UTCJun 21, 20:34 UTC10m
2026-06-21 ICE99K CPH → KEF Jun 21, 15:09 UTCJun 21, 18:10 UTC3h 0m
2026-06-21 ICE98C - Jun 21, 10:54 UTCJun 21, 13:29 UTC2h 35m
2026-06-20 ICE680 SEA → KEF Jun 20, 22:59 UTCJun 21, 05:59 UTC7h 0m
2026-06-20 ICE685 KEF → SEA Jun 20, 14:44 UTCJun 20, 18:24 UTC3h 40m
2026-06-20 ICE685 KEF → SEA Jun 20, 11:05 UTCJun 20, 11:20 UTC15m
2026-06-20 ICE12E - Jun 20, 02:49 UTCJun 20, 09:39 UTC6h 50m
2026-06-19 ICE681 - Jun 19, 19:29 UTCJun 20, 00:39 UTC5h 10m
2026-06-19 ICE681 - Jun 19, 17:19 UTCJun 19, 17:34 UTC15m
2026-06-19 ICE88E SEA → KEF Jun 19, 06:35 UTCJun 19, 13:39 UTC7h 5m
2026-06-18 ICE11P KEF → SEA Jun 18, 20:00 UTCJun 19, 03:15 UTC7h 14m
2026-06-18 ICE99K - Jun 18, 15:10 UTCJun 18, 18:05 UTC2h 55m
2026-06-18 ICE98C KEF → CPH Jun 18, 11:20 UTCJun 18, 14:01 UTC2h 40m
2026-06-18 ICE12E - Jun 18, 02:20 UTCJun 18, 09:20 UTC7h 0m
2026-06-17 ICE681 KEF → SEA Jun 17, 17:15 UTCJun 18, 00:35 UTC7h 20m
2026-06-17 ICE501 AMS → KEF Jun 17, 12:20 UTCJun 17, 15:10 UTC2h 50m
2026-06-17 ICE500 KEF → AMS Jun 17, 08:05 UTCJun 17, 10:50 UTC2h 45m
2026-06-16 ICE581 - Jun 16, 18:15 UTCJun 16, 22:55 UTC4h 41m
2026-06-16 ICE580 - Jun 16, 11:15 UTCJun 16, 16:25 UTC5h 10m
2026-06-16 ICE12E - Jun 16, 02:45 UTCJun 16, 09:50 UTC7h 5m
2026-06-15 ICE681 KEF → SEA Jun 15, 17:20 UTCJun 16, 00:29 UTC7h 10m
2026-06-15 ICE15M BER → KEF Jun 15, 12:25 UTCJun 15, 15:45 UTC3h 20m
2026-06-15 ICE14T KEF → BER Jun 15, 08:04 UTCJun 15, 11:10 UTC3h 5m
2026-06-15 ICE606 YHZ → KEF Jun 15, 00:20 UTCJun 15, 04:25 UTC4h 5m
2026-06-14 ICE607 KEF → YHZ Jun 14, 18:45 UTCJun 14, 22:50 UTC4h 5m
2026-06-14 ICE533 MUC → KEF Jun 14, 12:30 UTCJun 14, 16:10 UTC3h 40m

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-ICH page for operator, model, and routing details .

Mode-S 4CC577 frequently asked

What is Mode-S code 4CC577?
4CC577 is an ICAO 24-bit transponder address. Assigned to TF-ICH.
Is 4CC577 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 4CC577, octal 23142567, decimal 5,031,287.
What flights does 4CC577 operate?
Mode-S 4CC577 has broadcast 20 distinct callsigns, including ICE7K, ICE18L, ICE99K, ICE98C, ICE680.