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ULTRA "Main Series of Reports to Allied Commands", file references for 1944–45

Year/month

DEFE 3/
reference

Dates messages deciphered

Message numbers

 

 

 

 

1944

 

 

 

July

50

2–4

XL 501–750

 

51

4–6

XL 751–1000

 

52

6–8

XL 1001–1250

 

53

8–10

XL 1251–1500

 

54

10–12

XL 1501–1750

 

55

12–14

XL 1751–2000

 

56

14–16

XL 2002–2250
(XL 2001 missing)

 

57

16–17

XL 2251–2500

 

58

17–20

XL 2501–2750

 

59

20–22

XL 2751–3000

 

60

22–23

XL 3001–3250

 

61

23–26

XL 3252–3500
(XL 3251 missing)

 

62

26–27

XL 3501–3750

 

63

27–29

XL 3751–4000

 

64

29–31

XL 4001–4250

 

65

31 July–2 Aug

XL 4251–4500

August

112

2–5

XL 4501–4750

 

113

5–6

XL 4751–5000

 

114

6–8

XL 5001–5250

 

115

8–10

XL 5251–5500

 

116

10–12

XL 5501–5750

 

117

12–13

XL 5751–6000

 

118

13–15

XL 6001–6250

 

119

15–16

XL 6251–6500

 

120

16–17

XL 6501–6750

 

121

17–18

XL 6751–7000

 

122

19–20

XL 7001–7250

 

123

20–22

XL 7251–7500

 

124

22–24

XL 7501–7750

 

125

24–26

XL 7751–8000

 

126

26–28

XL 8001–8250

 

127

28–30

XL 8251–8500

 

128

30–31

XL 8501–8750

 

220

31 Aug–3 Sept

XL 8751-9000

September

221

3–6 Sept

XL 9001–9250

 

222

6–8 Sept

XL 9251–9500

 

223

8–10 Sept

XL 9501–9751

 

224

11–13 Sept

XL 9751–9999

 

225

13–15

HP 1–HP250

 

226

15–18

HP 251–500

 

227

18–21

HP 501–750

 

228

21–23

HP 751–1000

 

229

24–26

HP 1001–1250

 

230

26–28

HP 1251–1500

 

231

28–30

HP 1501–1750

October

232

1–3

HP 1751–2000

 

233

3–5

HP 2001–2250

 

234

5–7

HP 2251–2500

 

235

7–9

HP 2501–2750

 

236

9–10

HP 2751–3000

 

237

11–13

HP 3001–3250

 

238

14–16

HP 3251–3500

 

239

16–18

HP 3501–3750

 

240

18–20

HP 3751–4000

 

241

20–23

HP 4001–4250

 

242

23–25

HP 4251–4500

 

243

25–27

HP 4501–4750

 

244

27–30

HP 4751–5000

 

300

30 Oct–1 Nov

HP 5001–5250

November

301

1–4 Nov

HP 5251–5500

 

302

4–6

HP 5501–5750

 

303

6–8

HP 5751–6000

 

304

8–10

HP 6001–6250

 

305

11–13

HP 6251–6500

 

306

13–15

HP 6501–6750

 

307

15–18

HP 6751–7000

 

308

18–20

HP 7001–7250

 

309

20–23

HP 7251–7500

 

310

23–25

HP 7501–7750

 

311

25–27

HP 7751–8000

 

312

27–30

HP 8001–8250

 

313

30 Nov–3 Dec

HP 8251–8500

continued on next page …

PART TWO OF THREE


 

Notes:

(a) Messages are arranged in series of 9999, each prefixed by two letters (e.g. HP1–HP9999)

(b) Each file contains 250 messages, usually arranged from the highest numbered first to the lowest last.

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