ITU prefix/Grid chart

Linked country codes are from ISO 3166-1.

First character A

AA-AI:
US

AJ-AL:
US

AS:
PK

AT-AW:
IN

A1:
N/A

A2:
BW

First character D

DA-DI:
DE

DJ-DR:
DE

DS-DT:
KR

D1:
N/A

D2-D3:
AO

First character H

HA:
HU

HB:
CH(LI)

HJ-HK:
CO

HS:
TH

HT:
NI

H1:
N/A

H2:
CY

First character L

LA-LI:
NO

LJ-LN:
NO

LS-LW:
AR

L1:
N/A

L2-L9:
AR

First character P

PA-PI:
NL

PJ:
AN

PK-PO:
ID

PS-PY:
BR

P1:
N/A

P2:
PG

First character T

TA-TC:
TR

TJ:
CM

TK:
FR

TS:
TN

TT:
TD

T1:
N/A

T2:
TV

First character V

VA-VG:
CA

VJ-VN:
AU

VS:
GB

VT-VW:
IN

V1:
N/A

V2:
AG

First character Y

YA:
AF

YB-YH:
ID

YJ:
VU

YK:
SY

YS:
SV

YT-YU:
RS

Y1:
N/A

Y2-Y9:
DE

First character 3

3A:
MC

3B:
MU

3J-3R:
CN/TW

3S-3U:
CN/TW

31-39:
N/A

First character 5

5A:
LY

5B:
CY

5J-5K:
CO

5S:
MG

5T:
MR

51-59:
N/A

First character 7

7A-7I:
ID

7J-7N:
JP

7S:
SE

7T-7Y:
DZ

71-79:
N/A

First character 9

9A:
HR

9B-9D:
IR

9J:
ZM

9K:
KW

9S-9T:
CD

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.