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¹ Unofficial prefix.

² (Blenheim Reef) Only contacts made from May 4, 1967, to June 30, 1975, count for this entity. Contacts made July 1, 1975, and after, count as Chagos (VQ9).

³ (Geyser Reef) Only contacts made from May 4, 1967, to February 28, 1978, count for this entity.

⁴ (Abu Ail Is.) Only contacts made March 30, 1991, and before, count for this entity.

⁵ (1M) Only contacts made from July 15, 1972, and before, count for this entity. Contacts made July 16, 1972, and after, count as Tonga (A3).

⁶ (4W) Only contacts made May 21, 1990, and before, count for this entity.

⁷ (7J1) Only contacts made May 30, 1976, to November 30, 1980, count for this entity. Contacts made December 1, 1980, and after, count as Ogasawara (JD1).

⁸ (8Z4) Only contacts made December 25, 1981, and before, count for this entity.

⁹ (8Z5, 9K3) Only contacts made December 14, 1969, and before, count for this entity.

¹⁰ (9S4) Only contacts made March 31, 1957, and before, count for this entity.

¹¹ (9U5) Only contacts made from July 1, 1960, to June 30, 1962, count for this entity. Contacts made July 1, 1962, and after, count as Burundi (9U) or Rwanda (9X).

¹² (AC3) Only contacts made April 30, 1975, and before, count for this entity. Contacts made May 1, 1975, and after, count as India (VU).

¹³ (AC4) Only contacts made May 30, 1974, and before, count for this entity. Contacts made May 31, 1974 and after, count as China (BY).

¹⁴ (C9) Only contacts made September 15, 1963, and before, count for this entity. Contacts made September 14, 1963, and after, count as China (BY).

¹⁵ (CN2) Only contacts made June 30, 1960, and before, count for this entity. Contacts made July 1, 1960, and after, count as Morocco (CN).

¹⁶ (CR8) Only contacts made December 31, 1961, and before, count for this entity.

¹⁷ (CR8, CR10) Only contacts made September 14, 1976, and before, count for this entity.

¹⁸ (DA-DM) Only contacts made September 16, 1973, and before, count for this entity. Contacts made September 17, 1973, and after, count as either FRG (DA-DL) or GDR(Y2-Y9).

¹⁹ (DM, Y2-Y9) Only contacts made from September 17, 1973 and October 2, 1990 count for this entity. On October 3, 1990 the GDR became part of the FRG.

²⁰ (EA9) Only contacts made May 13, 1969, and before, count for this entity.

²¹ (FF) Only contacts made August 6, 1960, and before, count for this entity.

²² (FH, FB8) Only contacts made July 5, 1975, and before, count for this entity. Contacts made July 6, 1975, and after, count as Comoros (D6) or Mayotte (FH).

²³ (FI8) Only contacts made December 20, 1950, and before, count for this entity.

²⁴ (FN8) Only contacts made October 31, 1954, and before count for this entity.

²⁵ (FQ8) Only contacts made August 16, 1960, and before, will count for this entity.

²⁶ (HK0 , KP3, KS4) Only contacts made September 16, 1981, and before, count for this entity. Contacts made September 17, 1981, and after, count as San Andres (HK0).

²⁷ (I1) Only contacts made March 31, 1957, and before, count for this entity. Contacts made April 1, 1957, and after, count as Italy (I).

²⁸ (I5) Only contacts made June 30, 1960, and before, count for this entity.

²⁹ (JZ0) Only contacts made April 30, 1963, and before, count for this entity.

³⁰ (KR6, 8, JR6, KA6) Only contacts made May 14, 1972, and before, count for this entity. Contacts made May 15, 1972, and after, count as Japan (JA).

³¹ (KS4) Only contacts made August 31, 1972, and before, count for this entity. Contacts made September 1, 1972, and after, count as Honduras (HR).

³² (KZ5) Only contacts made September 30, 1979, and before, count for this entity.

³³ (OK-OM) Only contacts made December 31, 1992, and before, count for this entity.

³⁴ (P2, VK9) Only contacts made September 15, 1975, and before, count for this entity. Contacts made September 16, 1975, and after, count as Papua New Guinea (P2).

³⁵ (PK1-6) Only contacts made April 30, 1963, and before, count for this entity. Contacts made May 1, 1963, and after, count as Indonesia.

³⁶ (ST0) Only contacts made between May 7, 1972 and December 31, 1994 count for this entity.

³⁷ (UN1) Only contacts made June 30, 1960, and before, count for this entity. Contacts made July 1, 1960, and after, count as European RSFSR (UA).

³⁸ (VO) Only contacts made March 31, 1949, and before, count for this entity. Contacts made April 1, 1949, and after, count as Canada (VE).

³⁹ (VQ1, 5H1) Only contacts made May 31, 1974, and before, count for this entity. Contacts made June 1, 1974, and after, count as Tanzania (5H).

⁴⁰ (VQ6) Only contacts made June 30, 1960, and before, count for this entity.

⁴¹ (VQ9) Only contacts made June 28, 1976, and before, count for this entity. Contacts made June 29, 1976, and after, count as Seychelles (S7).

⁴² (VS2, VS4, ZC5, 9M2) Only contacts made September 15, 1963, and before, count for this entity. Contacts made September 16, 1963, and after, count as West Malaysia (9M2) or East Malaysia (9M6, 8).

⁴³ (VS9A, P,S) Only contacts made May 21, 1990, and before, count for this entity.

⁴⁴ (VS9H) Only contacts made November 29, 1967, and before, count for this entity.

⁴⁵ (VS9K) Only contacts made on March 10, 1982, and before, count for this entity.

⁴⁶ (ZC6, 4X1) Only contacts made June 30, 1968, and before, count for this entity. Contacts made July 1, 1968, and after, count as Israel (4X).

⁴⁷ (ZD4) Only contacts made March 5, 1957, and before, count for this entity.

⁴⁸ (ZS0, 1) Only contacts made February 28, 1994, and before, count for this entity.

⁴⁹ (ZS9) Only contacts made from September 1, 1977, to February 28, 1994, count for this entity.