Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AD22E1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N94556 · AIRBUS A-321neo · operated by UNITED AIRLINES INC

Hex
AD22E1
Octal
53221341
Decimal
11,346,657
Country
US
Tail
N94556
Type
A21N
Broadcasting now · callsign UAL2802 · 32,000 ft
Flights observed
357
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

AD22E1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AD22E1 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
UAL2618 - 7 2026-07-14
UAL1363 - 6 2026-07-01
UAL647 - 5 2026-07-13
UAL2481 - 5 2026-06-30
UAL2197 United Airlines 5 2026-05-31
UAL1010 United Airlines 5 2026-05-16
UAL1007 - 5 2026-06-27
UAL597 - 4 2026-07-12
UAL2123 - 4 2026-06-26
UAL212 - 4 2026-07-02
UAL1915 United Airlines 4 2026-05-26
UAL1377 United Airlines 4 2026-05-18
UAL1159 United Airlines 4 2026-05-06
UAL800 - 3 2026-06-26
UAL788 United Airlines 3 2026-04-21
UAL723 United Airlines 3 2026-04-13
UAL489 United Airlines 3 2026-07-03
UAL347 - 3 2026-07-04
UAL341 - 3 2026-06-20
UAL321 United Airlines 3 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 UAL2802 - Jul 14, 20:00 UTCJul 14, 20:15 UTC15m
2026-07-14 UAL2618 SEA → ORD Jul 14, 14:05 UTCJul 14, 18:10 UTC4h 5m
2026-07-14 UAL2618 SEA → ORD Jul 14, 14:18 UTCJul 14, 17:21 UTC3h 3m
2026-07-14 UAL360 DEN → SEA Jul 14, 01:35 UTCJul 14, 04:00 UTC2h 25m
2026-07-13 UAL484 - Jul 13, 21:40 UTCJul 13, 23:35 UTC1h 55m
2026-07-13 UAL1599 - Jul 13, 17:55 UTCJul 13, 20:00 UTC2h 5m
2026-07-13 UAL647 - Jul 13, 11:50 UTCJul 13, 15:30 UTC3h 40m
2026-07-13 UAL647 BOS → BOS Jul 13, 11:40 UTCJul 13, 11:45 UTC5m
2026-07-12 UAL597 DEN → BOS Jul 12, 20:35 UTCJul 13, 00:10 UTC3h 35m
2026-07-12 UAL581 ORD → DEN Jul 12, 16:20 UTCJul 12, 18:15 UTC1h 55m
2026-07-12 UAL581 ORD → DEN Jul 12, 16:25 UTCJul 12, 18:12 UTC1h 47m
2026-07-12 UAL1775 IAD → ORD Jul 12, 12:25 UTCJul 12, 14:01 UTC1h 35m
2026-07-12 UAL1924 DEN → IAD Jul 12, 06:20 UTCJul 12, 09:20 UTC3h 0m
2026-07-12 UAL767 ORD → DEN Jul 12, 01:40 UTCJul 12, 03:40 UTC2h 0m
2026-07-12 UAL767 ORD → DEN Jul 12, 01:38 UTCJul 12, 03:37 UTC1h 59m
2026-07-11 UAL1023 DEN → ORD Jul 11, 21:15 UTCJul 11, 23:15 UTC2h 0m
2026-07-11 UAL2843 - Jul 11, 17:30 UTCJul 11, 19:25 UTC1h 55m
2026-07-11 UAL2666 DEN → SNA Jul 11, 13:55 UTCJul 11, 15:45 UTC1h 50m
2026-07-11 UAL1792 EWR → DEN Jul 11, 02:17 UTCJul 11, 05:58 UTC3h 41m
2026-07-11 UAL1792 - Jul 11, 02:20 UTCJul 11, 05:50 UTC3h 30m
2026-07-10 UAL1505 DEN → EWR Jul 10, 20:53 UTCJul 11, 00:19 UTC3h 26m
2026-07-10 UAL1505 DEN → EWR Jul 10, 21:05 UTCJul 11, 00:20 UTC3h 15m
2026-07-10 UAL2455 EWR → DEN Jul 10, 14:10 UTCJul 10, 17:50 UTC3h 40m
2026-07-09 UAL1715 DEN → EWR Jul 9, 23:30 UTCJul 10, 02:50 UTC3h 20m
2026-07-09 UAL1999 EWR → DEN Jul 9, 16:17 UTCJul 9, 19:34 UTC3h 17m
2026-07-09 UAL1999 EWR → DEN Jul 9, 16:10 UTCJul 9, 19:40 UTC3h 30m
2026-07-09 UAL563 SNA → SFO Jul 9, 12:35 UTCJul 9, 14:05 UTC1h 30m
2026-07-09 UAL2649 DEN → ORD Jul 9, 04:10 UTCJul 9, 06:10 UTC2h 0m
2026-07-09 UAL2649 DEN → ORD Jul 9, 03:24 UTCJul 9, 05:58 UTC2h 34m
2026-07-09 UAL1323 LAS → DEN Jul 9, 00:10 UTCJul 9, 01:35 UTC1h 25m
2026-07-08 UAL526 DEN → LAS Jul 8, 17:50 UTCJul 8, 19:15 UTC1h 25m
2026-07-08 UAL792 IAD → DEN Jul 8, 12:30 UTCJul 8, 15:40 UTC3h 10m
2026-07-08 UAL1924 DEN → IAD Jul 8, 06:20 UTCJul 8, 09:20 UTC3h 0m
2026-07-08 UAL2610 - Jul 8, 02:20 UTCJul 8, 04:05 UTC1h 45m
2026-07-07 UAL374 - Jul 7, 20:00 UTCJul 7, 23:40 UTC3h 40m
2026-07-07 UAL2618 SEA → ORD Jul 7, 14:15 UTCJul 7, 17:50 UTC3h 35m
2026-07-06 UAL1801 ORD → SEA Jul 6, 22:20 UTCJul 7, 02:05 UTC3h 45m
2026-07-05 UAL2832 RSW → ORD Jul 5, 20:35 UTCJul 5, 23:15 UTC2h 40m
2026-07-05 UAL2601 RSW → EWR Jul 5, 15:45 UTCJul 5, 19:05 UTC3h 20m
2026-07-05 UAL2031 IAD → DEN Jul 5, 11:00 UTCJul 5, 14:10 UTC3h 10m
2026-07-04 UAL347 DEN → IAD Jul 4, 20:50 UTCJul 5, 00:00 UTC3h 10m
2026-07-04 UAL347 DEN → IAD Jul 4, 20:53 UTCJul 5, 00:05 UTC3h 12m
2026-07-04 UAL2843 - Jul 4, 17:30 UTCJul 4, 19:30 UTC2h 0m
2026-07-04 UAL2843 SNA → DEN Jul 4, 17:33 UTCJul 4, 19:26 UTC1h 53m
2026-07-04 UAL2666 ORD → DEN Jul 4, 13:50 UTCJul 4, 15:50 UTC2h 0m
2026-07-04 UAL2339 LAS → LAX Jul 4, 01:45 UTCJul 4, 03:35 UTC1h 50m
2026-07-03 UAL489 DEN → IAH Jul 3, 21:54 UTCJul 3, 23:54 UTC2h 0m
2026-07-03 UAL489 DEN → IAH Jul 3, 22:00 UTCJul 3, 23:55 UTC1h 55m
2026-07-03 UAL2168 - Jul 3, 17:45 UTCJul 3, 20:05 UTC2h 20m
2026-07-03 UAL2168 IAH → DEN Jul 3, 17:54 UTCJul 3, 19:55 UTC2h 1m

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 N94556 page for operator, model, and routing details .

Mode-S AD22E1 frequently asked

What is Mode-S code AD22E1?
AD22E1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N94556.
Where is Mode-S AD22E1 registered?
Mode-S code AD22E1 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 AD22E1 broadcasting right now?
Yes. Mode-S AD22E1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD22E1, octal 53221341, decimal 11,346,657.
What flights does AD22E1 operate?
Mode-S AD22E1 has broadcast 20 distinct callsigns, including UAL2618, UAL1363, UAL647, UAL2481, UAL2197.