Apparatus

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sensors Mode-S transponder

A0F8CB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N16170 · EMBRAER ERJ-145XR · operated by UNITED AIRLINES INC

Hex
A0F8CB
Octal
50174313
Decimal
10,549,451
Country
US
Tail
N16170
Type
E45X
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
652
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A0F8CB.

Country allocation

The ICAO 24-bit address A0F8CB falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
UCA4914 CommutAir 9 2026-07-22
UCA4815 CommutAir 8 2026-07-24
UCA4346 - 8 2026-07-05
UCA4325 CommutAir 8 2026-07-23
UCA4307 - 8 2026-07-09
UCA4287 - 8 2026-07-01
UCA4239 - 8 2026-06-30
UCA4919 - 7 2026-07-06
UCA4863 - 7 2026-07-11
UCA4347 - 7 2026-07-06
UCA4246 - 7 2026-06-13
UCA4245 - 7 2026-07-06
UCA4989 CommutAir 6 2026-05-26
UCA4923 - 6 2026-07-09
UCA4859 - 6 2026-07-10
UCA4845 - 6 2026-06-23
UCA4834 CommutAir 6 2026-07-26
UCA4369 - 6 2026-07-14
UCA4354 - 6 2026-07-10
UCA4319 CommutAir 6 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UCA4977 IAD → PVD Jul 26, 22:10 UTCJul 26, 22:45 UTC35m
2026-07-26 UCA4230 AVP → IAD Jul 26, 19:50 UTCJul 26, 20:35 UTC45m
2026-07-26 UCA4234 COD → DEN Jul 26, 17:30 UTCJul 26, 18:05 UTC35m
2026-07-26 UCA4834 PWM → IAD Jul 26, 15:00 UTCJul 26, 15:35 UTC35m
2026-07-26 UCA4319 IAD → SCE Jul 26, 13:05 UTCJul 26, 13:25 UTC20m
2026-07-26 UCA4319 IAD → SCE Jul 26, 13:01 UTCJul 26, 13:36 UTC35m
2026-07-26 UCA4244 OKC → IAH Jul 26, 10:20 UTCJul 26, 10:40 UTC20m
2026-07-26 UCA4964 IAD → MDT Jul 26, 02:50 UTCJul 26, 03:20 UTC30m
2026-07-26 UCA4322 IAD → PVD Jul 26, 00:00 UTCJul 26, 01:05 UTC1h 5m
2026-07-25 UCA4322 IAD → PVD Jul 25, 23:55 UTCJul 26, 01:05 UTC1h 10m
2026-07-25 UCA4310 IAD → BTV Jul 25, 21:30 UTCJul 25, 22:50 UTC1h 20m
2026-07-25 UCA4319 IAD → SCE Jul 25, 19:15 UTCJul 25, 20:20 UTC1h 5m
2026-07-25 UCA4348 JAN → IAH Jul 25, 16:50 UTCJul 25, 17:55 UTC1h 5m
2026-07-25 UCA4348 JAN → IAH Jul 25, 16:55 UTCJul 25, 17:53 UTC58m
2026-07-25 UCA4274 IAD → PVD Jul 25, 14:35 UTCJul 25, 15:35 UTC1h 0m
2026-07-25 UCA4294 IAD → PVD Jul 25, 12:40 UTCJul 25, 13:35 UTC55m
2026-07-25 UCA4294 IAD → PVD Jul 25, 12:41 UTCJul 25, 13:44 UTC1h 3m
2026-07-25 UCA4359 IAD → CMH Jul 25, 10:10 UTCJul 25, 10:30 UTC20m
2026-07-25 UCA4252 ORF → IAD Jul 25, 02:45 UTCJul 25, 03:10 UTC25m
2026-07-25 UCA4322 IAD → PVD Jul 25, 00:10 UTCJul 25, 01:15 UTC1h 5m
2026-07-24 UCA4310 IAD → BTV Jul 24, 21:35 UTCJul 24, 22:45 UTC1h 10m
2026-07-24 UCA4328 IAD → CMH Jul 24, 19:05 UTCJul 24, 19:30 UTC25m
2026-07-24 UCA4815 IAD → CHO Jul 24, 17:15 UTCJul 24, 17:30 UTC15m
2026-07-24 UCA4815 IAD → CHO Jul 24, 17:15 UTCJul 24, 17:41 UTC26m
2026-07-24 UCA4834 PWM → IAD Jul 24, 15:05 UTCJul 24, 15:35 UTC30m
2026-07-24 UCA4319 IAD → SCE Jul 24, 12:55 UTCJul 24, 13:20 UTC25m
2026-07-24 UCA4860 ROC → IAD Jul 24, 10:15 UTCJul 24, 11:15 UTC1h 0m
2026-07-24 UCA4856 IAH → CRP Jul 24, 02:50 UTCJul 24, 03:35 UTC45m
2026-07-24 UCA4270 MFE → IAH Jul 24, 00:10 UTCJul 24, 01:00 UTC50m
2026-07-23 UCA4823 PVD → IAD Jul 23, 22:20 UTCJul 23, 23:10 UTC50m
2026-07-23 UCA4959 GSP → IAD Jul 23, 19:20 UTCJul 23, 20:35 UTC1h 15m
2026-07-23 UCA4959 GSP → IAD Jul 23, 19:18 UTCJul 23, 20:41 UTC1h 23m
2026-07-23 UCA4962 IAD → GSP Jul 23, 17:10 UTCJul 23, 18:20 UTC1h 10m
2026-07-23 UCA4325 HSV → IAD Jul 23, 14:15 UTCJul 23, 15:20 UTC1h 5m
2026-07-22 UCA4914 IAD → TYS Jul 22, 23:15 UTCJul 23, 00:25 UTC1h 10m
2026-07-22 UCA4824 IAD → HSV Jul 22, 19:00 UTCJul 22, 20:00 UTC1h 0m
2026-07-22 UCA4241 BTV → IAD Jul 22, 17:00 UTCJul 22, 18:10 UTC1h 10m
2026-07-22 UCA4840 IAD → CHO Jul 22, 14:35 UTCJul 22, 15:30 UTC55m
2026-07-22 UCA4370 BTV → IAD Jul 22, 12:55 UTCJul 22, 13:35 UTC40m
2026-07-22 UCA4304 IAD → PHL Jul 22, 03:00 UTCJul 22, 04:10 UTC1h 10m
2026-07-22 UCA4304 IAD → PHL Jul 22, 02:58 UTCJul 22, 04:08 UTC1h 10m
2026-07-21 UCA4317 IAD → ALB Jul 21, 17:30 UTCJul 21, 18:30 UTC1h 0m
2026-07-21 UCA4857 MHT → IAD Jul 21, 13:40 UTCJul 21, 15:00 UTC1h 20m
2026-07-20 UCA4932 IAD → MHT Jul 20, 21:45 UTCJul 20, 22:55 UTC1h 10m
2026-07-20 UCA4229 XNA → IAH Jul 20, 19:05 UTCJul 20, 20:20 UTC1h 15m
2026-07-20 UCA4288 - Jul 20, 17:00 UTCJul 20, 18:00 UTC1h 0m
2026-07-20 UCA4288 IAD → CAE Jul 20, 16:55 UTCJul 20, 17:59 UTC1h 4m
2026-07-20 UCA4281 IAD → BTV Jul 20, 14:55 UTCJul 20, 15:10 UTC15m
2026-07-20 UCA4333 IAD → BDL Jul 20, 13:10 UTCJul 20, 13:30 UTC20m
2026-07-20 UCA4270 MFE → IAH Jul 20, 00:05 UTCJul 20, 00:55 UTC50m

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 N16170 page for operator, model, and routing details .

Mode-S A0F8CB frequently asked

What is Mode-S code A0F8CB?
A0F8CB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N16170.
Where is Mode-S A0F8CB registered?
Mode-S code A0F8CB is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A0F8CB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0F8CB, octal 50174313, decimal 10,549,451.
What flights does A0F8CB operate?
Mode-S A0F8CB has broadcast 20 distinct callsigns, including UCA4914, UCA4815, UCA4346, UCA4325, UCA4307.