ITU prefix/Grid chart

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Main article: ITU prefix

Linked country codes are from ISO 3166-1.

First character A First character C
AA-AI:
US		 CA-CE:
CL		 CF-CI:
CA
AJ-AL:
US		 AM-AO:
ES		 AP-AR:
PK		 CJ-CK:
CA		 CL-CM:
CU		 CN:
MA		 CO:
CU		 CP:
BO		 CQ-CR:
PT
AS:
PK		 AT-AW:
IN		 AX:
AU		 AY-AZ:
AR		 A0:
N/A		 CS-CU:
PT		 CV-CX:
UY		 CY-CZ:
CA		 C0:
N/A
A1:
N/A		 A2:
BW		 A3:
TO		 A4:
OM		 A5:
BT		 A6:
AE		 A7:
QA		 A8:
LR		 A9:
BH		 C1:
N/A		 C2:
NR		 C3:
AD		 C4:
CY		 C5:
GM		 C6:
BS		 C7:
XM		 C8-C9:
MZ
First character D First character E
DA-DI:
DE		 EA-EH:
ES		 EI:
IE
DJ-DR:
DE		 EJ:
IE		 EK:
AM		 EL:
LR		 EM-EO:
UA		 EP-EQ:
IR		 ER:
MD
DS-DT:
KR		 DU-DZ:
PH		 D0:
N/A		 ES:
EE		 ET:
ET		 EU-EW:
BY		 EX:
KG		 EY:
TJ		 EZ:
TM		 E0:
N/A
D1:
N/A		 D2-D3:
AO		 D4:
CV		 D5:
LR		 D6:
KM		 D7-D9:
KR		 E1:
N/A		 E2:
TH		 E3:
ER		 E4:
PS		 E5:
CK		 E6:
N/A		 E7:
BA		 E8-E9:
N/A
First character H First character J
HA:
HU		 HB:
CH(LI)		 HC-HD:
EC		 HE:
CH		 HF:
PL		 HG:
HU		 HH:
HT		 HI:
DO		 JA-JI:
JP
HJ-HK:
CO		 HL:
KR		 HM:
KP		 HN:
IQ		 HO-HP:
PA		 HQ-HR:
HN		 JJ-JR:
JP
HS:
TH		 HT:
NI		 HU:
SV		 HV:
VA		 HW-HY:
FR		 HZ:
SA		 H0:
N/A		 JS:
JP		 JT-JV:
MG		 JW-JX:
NO		 JY:
JO		 JZ:
ID		 J0:
N/A
H1:
N/A		 H2:
CY		 H3:
PA		 H4:
SB		 H5:
N/A		 H6-H7:
NI		 H8-H9:
PA		 J1:
N/A		 J2:
DJ		 J3:
GD		 J4:
GR		 J5:
GW		 J6:
LC		 J7:
DM		 J8:
VC		 J9:
N/A
First character L First character O
LA-LI:
NO		 OA-OC:
PE		 OD:
LB		 OE:
AT		 OF-OI:
FI
LJ-LN:
NO		 LO-LR:
AR		 OJ:
FI		 OK-OL:
CZ		 OM:
SK		 ON-OR:
BE
LS-LW:
AR		 LX:
LU		 LY:
LT		 LZ:
BG		 L0:
N/A		 OS-OT:
BE		 OU-OZ:
DK		 O0:
N/A
L1:
N/A		 L2-L9:
AR		 O1-O9:
N/A
First character P First character S
PA-PI:
NL		 SA-SI:
SE
PJ:
AN		 PK-PO:
ID		 PP-PR:
BR		 SJ-SM:
SE		 SN-SR:
PL
PS-PY:
BR		 PZ:
SR		 P0:
N/A		 SS:
EG/SD		 ST:
SD		 SU:
EG		 SV-SZ:
GR		 S0:
N/A
P1:
N/A		 P2:
PG		 P3:
CY		 P4:
AW		 P5-P9:
KP		 S1:
N/A		 S2-S3:
BD		 S4:
N/A		 S5:
SI		 S6:
SG		 S7:
SC		 S8:
ZA		 S9:
ST
First character T First character U
TA-TC:
TR		 TD:
GT		 TE:
CR		 TF:
IS		 TG:
GT		 TH:
FR		 TI:
CR		 UA-UI:
RU
TJ:
CM		 TK:
FR		 TL:
CF		 TM:
FR		 TN:
CG		 TO-TQ:
FR		 TR:
GA		 UJ-UM:
UZ		 UN-UQ:
KZ		 UR:
UA
TS:
TN		 TT:
TD		 TU:
CI		 TV-TX:
FR		 TY:
BJ		 TZ:
ML		 T0:
N/A		 US-UZ:
UA		 U0:
N/A
T1:
N/A		 T2:
TV		 T3:
KI		 T4:
CU		 T5:
SO		 T6:
AF		 T7:
SM		 T8:
PW		 T9:
N/A		 U1-U9:
N/A
First character V First character X
VA-VG:
CA		 VH-VI:
AU		 XA-XI:
MX
VJ-VN:
AU		 VO:
CA		 VP-VQ:
GB		 VR:
HK		 XJ-XO:
CA		 XP:
DK		 XQ-XR:
CL
VS:
GB		 VT-VW:
IN		 VX-VY:
CA		 VZ:
AU		 V0:
N/A		 XS:
CN/TW		 XT:
BF		 XU:
KH		 XV:
VN		 XW:
LA		 XX:
MO		 XY-XZ:
MM		 X0:
N/A
V1:
N/A		 V2:
AG		 V3:
BZ		 V4:
KN		 V5:
NA		 V6:
FM		 V7:
MH		 V8:
BN		 V9:
N/A		 X1-X9:
N/A
First character Y First character Z
YA:
AF		 YB-YH:
ID		 YI:
IQ		 ZA:
AL		 ZB-ZI:
GB
YJ:
VU		 YK:
SY		 YL:
LV		 YM:
TR		 YN:
NI		 YO-YR:
RO		 ZJ:
GB		 ZK-ZM:
NZ		 ZN-ZO:
GB		 ZP:
PY		 ZQ:
GB		 ZR:
ZA
YS:
SV		 YT-YU:
RS		 YV-YY:
VE		 YZ-Y0:
N/A		 ZS-ZU:
ZA		 ZV-ZZ:
BR		 Z0:
N/A
Y1:
N/A		 Y2-Y9:
DE		 Z1:
N/A		 Z2:
ZW		 Z3:
MK		 Z4-Z9:
N/A
First character 3 First character 4
3A:
MC		 3B:
MU		 3C:
GQ		 3D:
SZ/FJ		 3E-3F:
PA		 3G:
CL		 3H-3I:
CN/TW		 4A-4C:
MX		 4D-4I:
PH
3J-3R:
CN/TW		 4J-4K:
AZ		 4L:
GE		 4M:
VE		 4N:
N/A		 4O:
ME		 4P-4R:
LK
3S-3U:
CN/TW		 3V:
TN		 3W:
VN		 3X:
GN		 3Y:
NO		 3Z:
PL		 30:
N/A		 4S:
LK		 4T:
PE		 4U:
XU		 4V:
HT		 4W:
TL		 4X:
IL		 4Y:
XA		 4Z:
IL		 40:
N/A
31-39:
N/A		 41-49:
N/A
First character 5 First character 6
5A:
LY		 5B:
CY		 5C-5G:
MA		 5H-5I:
TZ		 6A-6B:
EG		 6C:
SY		 6D-6I:
MX
5J-5K:
CO		 5L-5M:
LR		 5N-5O:
NG		 5P-5Q:
DK		 5R:
MG		 6J:
MX		 6K-6N:
KR		 6O:
SO		 6P-6R:
PK
5S:
MG		 5T:
MR		 5U:
NE		 5V:
TG		 5W:
WS		 5X:
UG		 5Y-5Z:
KE		 50:
N/A		 6S:
PK		 6T-6U:
SD		 6V-6W:
SN		 6X:
MG		 6Y:
JM		 6Z:
LR		 60:
N/A
51-59:
N/A		 61-69:
N/A
First character 7 First character 8
7A-7I:
ID		 8A-8I:
ID
7J-7N:
JP		 7O:
YE		 7P:
LS		 7Q:
MW		 7R:
DZ		 8J-8N:
JP		 8O:
BW		 8P:
BB		 8Q:
MV		 8R:
GY
7S:
SE		 7T-7Y:
DZ		 7Z:
SA		 70:
N/A		 8S:
SE		 8T-8Y:
IN		 8Z:
SA		 80:
N/A
71-79:
N/A		 81-89:
N/A
First character 9 Full first-character allocations
9A:
HR		 9B-9D:
IR		 9E-9F:
ET		 9G:
GH		 9H:
MT		 9I:
ZM

B: CN (TW)
F: FR
G: GB
I: IT

K: US
M: GB
N: US
Q: XQ

R: RU
W: US
2: GB
 
9J:
ZM		 9K:
KW		 9L:
SL		 9M:
MY		 9N:
NP		 9O-9R:
CD
9S-9T:
CD		 9U:
BI		 9V:
SG		 9W:
MY		 9X:
RW		 9Y-9Z:
TT		 90:
N/A
91-99:
N/A

       Series allocated to an international organization.
       Provisional allocation in accordance with No. S19.33: "Between radiocommunication conferences, the Secretary-General is authorized to deal with questions relating to changes in the allocation of series of call signs, on a provisional basis, and subject to confirmation by the following conference."
       Half series allocation. The first country listed uses all callsigns beginning with the listed prefix followed by A-M, and the second country listed uses N-Z.