Stuttgart/Echterdingen (EDDS/STR) 2023 (MIL)

[RCH111]

01.02.2023
GAF A400M '54+02' (GAF681) AAL-STR, STA 13:26
USAF C-146 '95-3058' (GLASS30) AVB-STR, STA 17:35

[Rabbit]

01-02-2023

99-00102 UC-35A USArE DUKE15
95-3058 C-146D USAF GLASS50

source ads-b

[Rabbit]

03-02-2023

54+37 A400M GAF GAF177

Source: ads-b

[RCH111]

05.02.2023
USCG C-37 '02' (C102) STN-STR, STA 14:08

[RCH111]

06.02.2023
USCG C-37 '02' (C102) STR-ADW, STD 16:45
NATO A332 'T-056' (MMF48) YYR-STR, STA 18:17
GAF A400M '54+34' (GAFMED1) EBL-STR, STA 23:56

[RCH111]

07.02.2023
NATO A332 'T-056' (MMF48) STR-CGN, ETD 11:24
Private B350 'N350KV' (N350KV) STR-TUN, STD 14:39

[RCH111]

08.02.2023
Italy Air Force C130 'MM62181' (IAM4634) RZE-STR, STA 14:44

[RCH111]

09.02.2023
USAF C-130 '11-5738' (JUMP56) RMS-STR, STA 16:44

[Rabbit]

09-02-2023

11-5738 C-130J-30 USAFE JUMP50

Source: ads-b

[RCH111]

12.02.2023
USAF C-146 '95-3058' (GLASS50) CHQ-STR, ETA 12:48

[RCH111]

14.02.2023
USAF C-146 '95-3058' (GLASS50) CHQ-STR, STA 17:48

[RCH111]

16.02.2023
USAF C-146 '95-3058' (GLASS50) STR-CHQ, STD 09:12
Phonix Air GLF3 'N198PA' (GRB553) MUC-STR STA 17:32
RAF F900 'G-ZABH' (KRF15) MUC-STR, STA 16:00
USAF C-40 '21-0044' (SMOOTH05) IDA-STR, STA 20:48

[Rabbit]

16-02-2023

84-00162 C-12U3 USArE DUKE22
84-00165 C-12U3 USArE DUKE11

Source: ads-b

[RCH111]

17.02.2023
USN SW4 '900528' (CNV6417) NSY-STR, STA 12:24
RAF F900 'G-ZABH' (KRF15) STR-MUC, STD 16:45

[Sjoerd]

USAF C-40 '21-0044' (SMOOTH05) IDA-STR, STA 20:48

Is this serial actually read, taken from its flight plan, or is this a guess?

I've seen serial 21-0024 quoted before, as well as 21-0022. From what I understand this plane has no serial on it. The USAF also doesn't give any clue about the existince of this plane either.