Apparatus

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sensors Mode-S transponder

A81F7B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N622UP · BOEING 747-8 · operated by UNITED PARCEL SERVICE CO

Hex
A81F7B
Octal
52017573
Decimal
11,018,107
Country
US
Tail
N622UP
Type
B748
No current signal · last broadcast 20h ago
Flights observed
241
Distinct callsigns
20
Country
US
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S A81F7B.

Country allocation

The ICAO 24-bit address A81F7B 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
UPS64 United Parcel Service 15 2026-07-04
UPS67 - 11 2026-06-11
UPS62 - 11 2026-06-25
UPS59 - 11 2026-06-28
UPS61 - 8 2026-06-25
UPS4 United Parcel Service 8 2026-07-07
UPS9 United Parcel Service 7 2026-04-15
UPS55 United Parcel Service 7 2026-05-22
UPS11 United Parcel Service 7 2026-05-10
UPS70 United Parcel Service 6 2026-04-24
UPS68 United Parcel Service 6 2026-05-04
UPS5966 - 6 2026-06-28
UPS216 United Parcel Service 6 2026-05-20
UPS203 - 6 2026-07-09
UPS66 United Parcel Service 5 2026-05-21
UPS63 - 5 2026-07-02
UPS1 - 5 2026-07-08
UPS93 United Parcel Service 4 2026-05-30
UPS81 - 4 2026-07-01
UPS77 United Parcel Service 4 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 UPS10 - Jul 13, 08:35 UTCJul 13, 12:15 UTC3h 40m
2026-07-09 UPS203 PHL → CGN Jul 9, 13:45 UTCJul 9, 20:40 UTC6h 55m
2026-07-09 UPS204 CGN → PHL Jul 9, 02:50 UTCJul 9, 10:30 UTC7h 40m
2026-07-08 UPS1 - Jul 8, 16:25 UTCJul 8, 20:45 UTC4h 20m
2026-07-08 UPS1 - Jul 8, 08:40 UTCJul 8, 08:55 UTC15m
2026-07-07 UPS4 STN → TPE Jul 7, 19:15 UTCJul 7, 19:45 UTC30m
2026-07-07 UPS4 STN → TPE Jul 7, 08:30 UTCJul 7, 12:30 UTC4h 0m
2026-07-07 UPS4 STN → TPE Jul 7, 01:55 UTCJul 7, 02:40 UTC45m
2026-07-04 UPS1 HKG → CGN Jul 4, 19:40 UTCJul 5, 07:35 UTC11h 55m
2026-07-04 UPS64 SDF → ANC Jul 4, 08:59 UTCJul 4, 14:57 UTC5h 58m
2026-07-04 UPS64 SDF → ANC Jul 4, 07:20 UTCJul 4, 07:35 UTC15m
2026-07-03 UPS64 SDF → ANC Jul 3, 19:42 UTCJul 4, 07:04 UTC11h 22m
2026-07-03 UPS64 SDF → ANC Jul 3, 19:45 UTCJul 3, 20:50 UTC1h 5m
2026-07-03 UPS64 SDF → ANC Jul 3, 09:40 UTCJul 3, 10:45 UTC1h 5m
2026-07-03 UPS64 SDF → ANC Jul 3, 09:36 UTCJul 3, 15:38 UTC6h 2m
2026-07-02 UPS63 ANC → SDF Jul 2, 23:37 UTCJul 3, 05:18 UTC5h 41m
2026-07-02 UPS63 ANC → SDF Jul 2, 23:30 UTCJul 3, 05:30 UTC6h 0m
2026-07-02 UPS63 HKG → ANC Jul 2, 11:30 UTCJul 2, 20:50 UTC9h 20m
2026-07-01 UPS1938 - Jul 1, 19:55 UTCJul 1, 20:15 UTC20m
2026-07-01 UPS1938 HNL → HKG Jul 1, 19:52 UTCJul 2, 06:10 UTC10h 18m
2026-07-01 UPS56 - Jul 1, 10:45 UTCJul 1, 11:25 UTC40m
2026-07-01 UPS56 ONT → HNL Jul 1, 10:41 UTCJul 1, 16:12 UTC5h 31m
2026-07-01 UPS81 ANC → ONT Jul 1, 02:00 UTCJul 1, 06:15 UTC4h 15m
2026-06-30 UPS81 PVG → ANC Jun 30, 14:58 UTCJun 30, 22:59 UTC8h 1m
2026-06-29 UPS34 - Jun 29, 20:54 UTCJun 30, 16:45 UTC19h 50m
2026-06-29 UPS34 - Jun 29, 14:04 UTCJun 29, 14:19 UTC15m
2026-06-28 UPS5966 - Jun 28, 20:59 UTCJun 29, 00:44 UTC3h 45m
2026-06-28 UPS5966 SDF → HNL Jun 28, 20:47 UTCJun 29, 05:33 UTC8h 46m
2026-06-28 UPS59 - Jun 28, 01:04 UTCJun 28, 06:55 UTC5h 50m
2026-06-27 UPS59 HKG → ANC Jun 27, 13:15 UTCJun 27, 22:20 UTC9h 5m
2026-06-26 UPS64 SDF → ANC Jun 26, 19:50 UTCJun 27, 06:30 UTC10h 40m
2026-06-26 UPS64 SDF → ANC Jun 26, 10:39 UTCJun 26, 16:44 UTC6h 5m
2026-06-25 UPS61 - Jun 25, 23:24 UTCJun 26, 05:10 UTC5h 45m
2026-06-25 UPS61 TPE → ANC Jun 25, 12:40 UTCJun 25, 21:15 UTC8h 35m
2026-06-25 UPS61 HKG → TPE Jun 25, 08:34 UTCJun 25, 10:09 UTC1h 35m
2026-06-25 UPS62 - Jun 25, 04:29 UTCJun 25, 04:45 UTC15m
2026-06-24 UPS62 - Jun 24, 18:39 UTCJun 25, 03:59 UTC9h 20m
2026-06-24 UPS62 - Jun 24, 09:39 UTCJun 24, 16:05 UTC6h 25m
2026-06-23 UPS63 - Jun 23, 23:19 UTCJun 24, 04:59 UTC5h 40m
2026-06-23 UPS63 HKG → ANC Jun 23, 11:19 UTCJun 23, 21:10 UTC9h 50m
2026-06-21 UPS38 - Jun 21, 09:15 UTCJun 21, 09:29 UTC15m
2026-06-20 UPS38 - Jun 20, 22:59 UTCJun 21, 08:44 UTC9h 45m
2026-06-20 UPS38 HNL → HKG Jun 20, 23:05 UTCJun 21, 09:22 UTC10h 17m
2026-06-20 UPS36 HNL → SYD Jun 20, 11:34 UTCJun 20, 20:05 UTC8h 30m
2026-06-19 UPS214 CGN → SDF Jun 19, 23:34 UTCJun 20, 07:49 UTC8h 15m
2026-06-19 UPS3 - Jun 19, 12:39 UTCJun 19, 17:14 UTC4h 35m
2026-06-19 UPS3 - Jun 19, 05:00 UTCJun 19, 05:14 UTC15m
2026-06-18 UPS4 STN → TPE Jun 18, 20:05 UTCJun 18, 20:40 UTC35m
2026-06-18 UPS4 STN → TPE Jun 18, 09:00 UTCJun 18, 13:10 UTC4h 10m
2026-06-18 UPS4 STN → TPE Jun 18, 01:55 UTCJun 18, 02:45 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 N622UP page for operator, model, and routing details .

Mode-S A81F7B frequently asked

What is Mode-S code A81F7B?
A81F7B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N622UP.
Where is Mode-S A81F7B registered?
Mode-S code A81F7B 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 A81F7B broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A81F7B, octal 52017573, decimal 11,018,107.
What flights does A81F7B operate?
Mode-S A81F7B has broadcast 20 distinct callsigns, including UPS64, UPS67, UPS62, UPS59, UPS61.