Apparatus

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sensors Mode-S transponder

A0FBB7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N16217 · BOEING 737-800 · operated by UNITED AIRLINES INC

Hex
A0FBB7
Octal
50175667
Decimal
10,550,199
Country
US
Tail
N16217
Type
B738
Broadcasting now · callsign UAL2800 · 34,000 ft
Flights observed
454
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:35 UTC

Current position

A0FBB7 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0FBB7 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
UAL1257 - 6 2026-07-11
UAL1910 - 5 2026-06-30
UAL766 United Airlines 4 2026-06-13
UAL686 United Airlines 4 2026-04-18
UAL618 - 4 2026-07-11
UAL453 - 4 2026-07-04
UAL2745 United Airlines 4 2026-05-20
UAL2638 - 4 2026-07-18
UAL2421 United Airlines 4 2026-05-17
UAL2135 - 4 2026-07-19
UAL1973 - 4 2026-06-23
UAL1968 United Airlines 4 2026-07-25
UAL1156 United Airlines 4 2026-07-25
UAL8105 - 3 2026-07-08
UAL671 - 3 2026-07-08
UAL574 - 3 2026-06-15
UAL565 - 3 2026-07-11
UAL382 - 3 2026-07-17
UAL2683 United Airlines 3 2026-07-25
UAL2498 - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2290 ORD → SFO Jul 26, 18:45 UTCJul 26, 20:25 UTC1h 40m
2026-07-26 UAL1310 EWR → JAX Jul 26, 14:38 UTCJul 26, 16:06 UTC1h 28m
2026-07-26 UAL1310 EWR → JAX Jul 26, 14:30 UTCJul 26, 16:15 UTC1h 45m
2026-07-26 UAL2617 SFO → LAX Jul 26, 11:15 UTCJul 26, 12:55 UTC1h 40m
2026-07-25 UAL2486 SAN → ORD Jul 25, 23:50 UTCJul 26, 03:25 UTC3h 35m
2026-07-25 UAL2683 ORD → SAN Jul 25, 18:50 UTCJul 25, 22:20 UTC3h 30m
2026-07-25 UAL2683 ORD → SAN Jul 25, 18:50 UTCJul 25, 22:18 UTC3h 28m
2026-07-25 UAL1968 ORD → BOS Jul 25, 14:49 UTCJul 25, 17:01 UTC2h 12m
2026-07-25 UAL1968 ORD → BOS Jul 25, 14:40 UTCJul 25, 17:25 UTC2h 45m
2026-07-25 UAL1156 IAD → EWR Jul 25, 01:25 UTCJul 25, 04:45 UTC3h 20m
2026-07-24 UAL2422 NAS → ORD Jul 24, 20:45 UTCJul 24, 23:35 UTC2h 50m
2026-07-24 UAL2401 ORD → NAS Jul 24, 16:15 UTCJul 24, 18:35 UTC2h 20m
2026-07-24 UAL1297 LAS → EWR Jul 24, 12:15 UTCJul 24, 13:55 UTC1h 40m
2026-07-23 UAL1965 LGA → IAH Jul 23, 23:46 UTCJul 24, 04:15 UTC4h 29m
2026-07-23 UAL1965 LGA → IAH Jul 23, 23:30 UTCJul 24, 04:15 UTC4h 45m
2026-07-23 UAL372 HNL → SFO Jul 23, 20:45 UTCJul 23, 21:35 UTC50m
2026-07-23 UAL203 SFO → ABQ Jul 23, 17:55 UTCJul 23, 18:40 UTC45m
2026-07-23 UAL1006 LAX → SFO Jul 23, 15:55 UTCJul 23, 16:40 UTC45m
2026-07-23 UAL1006 LAX → SFO Jul 23, 13:40 UTCJul 23, 14:05 UTC25m
2026-07-23 UAL1863 PUJ → ORD Jul 23, 04:30 UTCJul 23, 05:40 UTC1h 10m
2026-07-23 UAL1863 PUJ → ORD Jul 23, 04:25 UTCJul 23, 05:35 UTC1h 10m
2026-07-22 UAL1243 PVR → SFO Jul 22, 20:45 UTCJul 23, 00:00 UTC3h 15m
2026-07-22 UAL1212 SFO → PVR Jul 22, 16:10 UTCJul 23, 00:05 UTC7h 55m
2026-07-22 UAL2056 LAS → SFO Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-22 UAL1427 MID → IAH Jul 22, 02:05 UTCJul 22, 03:05 UTC1h 0m
2026-07-21 UAL1189 SFO → SFO Jul 21, 16:15 UTCJul 21, 22:50 UTC6h 35m
2026-07-21 UAL2647 DCA → IAH Jul 21, 13:20 UTCJul 21, 14:15 UTC55m
2026-07-21 UAL8279 DUB → YUL Jul 21, 06:40 UTCJul 21, 07:35 UTC55m
2026-07-21 UAL8279 DUB → YUL Jul 21, 06:39 UTCJul 21, 07:28 UTC49m
2026-07-21 UAL1195 DTW → ORD Jul 21, 04:15 UTCJul 21, 05:25 UTC1h 10m
2026-07-20 UAL2212 PHL → IAH Jul 20, 20:35 UTCJul 21, 03:05 UTC6h 30m
2026-07-20 UAL2487 RSW → EWR Jul 20, 17:22 UTCJul 20, 18:08 UTC46m
2026-07-20 UAL2487 RSW → EWR Jul 20, 17:20 UTCJul 20, 18:15 UTC55m
2026-07-20 UAL1481 DEN → PHX Jul 20, 14:30 UTCJul 20, 15:50 UTC1h 20m
2026-07-20 UAL2041 SFO → SAN Jul 20, 10:55 UTCJul 20, 12:40 UTC1h 45m
2026-07-20 UAL2378 SFO → BUR Jul 20, 02:20 UTCJul 20, 04:40 UTC2h 20m
2026-07-19 UAL1834 DFW → EWR Jul 19, 23:25 UTCJul 20, 01:05 UTC1h 40m
2026-07-19 UAL1834 DFW → EWR Jul 19, 23:18 UTCJul 20, 00:59 UTC1h 41m
2026-07-19 UAL1501 - Jul 19, 19:55 UTCJul 19, 22:05 UTC2h 10m
2026-07-19 UAL2135 - Jul 19, 14:15 UTCJul 19, 18:15 UTC4h 0m
2026-07-18 UAL2638 - Jul 18, 21:45 UTCJul 19, 02:05 UTC4h 20m
2026-07-18 UAL2135 - Jul 18, 14:20 UTCJul 18, 18:10 UTC3h 50m
2026-07-17 UAL2638 - Jul 17, 21:39 UTCJul 18, 01:34 UTC3h 55m
2026-07-17 UAL382 - Jul 17, 17:15 UTCJul 17, 19:45 UTC2h 30m
2026-07-17 UAL2047 IAH → DCA Jul 17, 13:00 UTCJul 17, 15:35 UTC2h 35m
2026-07-17 UAL469 - Jul 17, 10:40 UTCJul 17, 11:20 UTC40m
2026-07-17 UAL1542 - Jul 17, 01:29 UTCJul 17, 02:05 UTC35m
2026-07-16 UAL1794 - Jul 16, 20:09 UTCJul 16, 23:10 UTC3h 0m
2026-07-16 UAL678 - Jul 16, 15:14 UTCJul 16, 18:29 UTC3h 15m
2026-07-16 UAL678 IAH → LGA Jul 16, 15:07 UTCJul 16, 18:27 UTC3h 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 N16217 page for operator, model, and routing details .

Mode-S A0FBB7 frequently asked

What is Mode-S code A0FBB7?
A0FBB7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N16217.
Where is Mode-S A0FBB7 registered?
Mode-S code A0FBB7 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 A0FBB7 broadcasting right now?
Yes. Mode-S A0FBB7 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0FBB7, octal 50175667, decimal 10,550,199.
What flights does A0FBB7 operate?
Mode-S A0FBB7 has broadcast 20 distinct callsigns, including UAL1257, UAL1910, UAL766, UAL686, UAL618.