Encoding Tables
Note that postal codes use only 20 letters; six letters (D, F, I, O, Q, U) are never used. Unused codepoints are indicated with dashes.
First and fourth fields (8 bits) | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
00: –– | 01: –– | 02: –– | 03: –– | 04: –– | 05: –– | 06: –– | 07: –– | 08: –– | 09: –– | 0A: –– | 0B: –– | 0C: –– | 0D: –– | 0E: –– | 0F: –– |
10: –– | 11: X0 | 12: V1 | 13: V3 | 14: X1 | 15: V5 | 16: V6 | 17: V7 | 18: –– | 19: V2 | 1A: V0 | 1B: V4 | 1C: X2 | 1D: V8 | 1E: V9 | 1F: –– |
20: Z1 | 21: N1 | 22: L1 | 23: L3 | 24: T1 | 25: L5 | 26: L6 | 27: L7 | 28: W1 | 29: L2 | 2A: L0 | 2B: L4 | 2C: P1 | 2D: L8 | 2E: L9 | 2F: –– |
30: Z3 | 31: N3 | 32: K1 | 33: K3 | 34: T3 | 35: K5 | 36: K6 | 37: K7 | 38: W3 | 39: K2 | 3A: K0 | 3B: K4 | 3C: P3 | 3D: K8 | 3E: K9 | 3F: –– |
40: –– | 41: X3 | 42: M1 | 43: M3 | 44: X4 | 45: M5 | 46: M6 | 47: M7 | 48: –– | 49: M2 | 4A: M0 | 4B: M4 | 4C: X5 | 4D: M8 | 4E: M9 | 4F: –– |
50: Z5 | 51: N5 | 52: R1 | 53: R3 | 54: T5 | 55: R5 | 56: R6 | 57: R7 | 58: W5 | 59: R2 | 5A: R0 | 5B: R4 | 5C: P5 | 5D: R8 | 5E: R9 | 5F: –– |
60: Z6 | 61: N6 | 62: J1 | 63: J3 | 64: T6 | 65: J5 | 66: J6 | 67: J7 | 68: W6 | 69: J2 | 6A: J0 | 6B: J4 | 6C: P6 | 6D: J8 | 6E: J9 | 6F: –– |
70: Z7 | 71: N7 | 72: A1 | 73: A3 | 74: T7 | 75: A5 | 76: A6 | 77: A7 | 78: W7 | 79: A2 | 7A: A0 | 7B: A4 | 7C: P7 | 7D: A8 | 7E: A9 | 7F: –– |
80: –– | 81: –– | 82: H1 | 83: H3 | 84: X9 | 85: H5 | 86: H6 | 87: H7 | 88: –– | 89: H2 | 8A: H0 | 8B: H4 | 8C: –– | 8D: H8 | 8E: H9 | 8F: –– |
90: Z2 | 91: N2 | 92: G1 | 93: G3 | 94: T2 | 95: G5 | 96: G6 | 97: G7 | 98: W2 | 99: G2 | 9A: G0 | 9B: G4 | 9C: P2 | 9D: G8 | 9E: G9 | 9F: –– |
A0: Z0 | A1: N0 | A2: S1 | A3: S3 | A4: T0 | A5: S5 | A6: S6 | A7: S7 | A8: W0 | A9: S2 | AA: S0 | AB: S4 | AC: P0 | AD: S8 | AE: S9 | AF: –– |
B0: Z4 | B1: N4 | B2: C1 | B3: C3 | B4: T4 | B5: C5 | B6: C6 | B7: C7 | B8: W4 | B9: C2 | BA: C0 | BB: C4 | BC: P4 | BD: C8 | BE: C9 | BF: –– |
C0: –– | C1: X6 | C2: B1 | C3: B3 | C4: X7 | C5: B5 | C6: B6 | C7: B7 | C8: –– | C9: B2 | CA: B0 | CB: B4 | CC: X8 | CD: B8 | CE: B9 | CF: –– |
D0: Z8 | D1: N8 | D2: E1 | D3: E3 | D4: T8 | D5: E5 | D6: E6 | D7: E7 | D8: W8 | D9: E2 | DA: E0 | DB: E4 | DC: P8 | DD: E8 | DE: E9 | DF: –– |
E0: Z9 | E1: N9 | E2: Y1 | E3: Y3 | E4: T9 | E5: Y5 | E6: Y6 | E7: Y7 | E8: W9 | E9: Y2 | EA: Y0 | EB: Y4 | EC: P9 | ED: Y8 | EE: Y9 | EF: –– |
F0: –– | F1: –– | F2: –– | F3: –– | F4: –– | F5: –– | F6: –– | F7: –– | F8: –– | F9: –– | FA: –– | FB: –– | FC: –– | FD: –– | FE: –– | FF: –– |
Second field (5 bits) | Third field (4 bits) | ||||||||||||||
00: — | 01: — | 02: L | 03: K | 04: M | 05: R | 06: J | 07: A | 0: — | 1: — | 2: 1 | 3: 3 | ||||
08: H | 09: G | 0A: S | 0B: C | 0C: B | 0D: E | 0E: Y | 0F: — | 4: — | 5: 5 | 6: 6 | 7: 7 | ||||
10: — | 11: V | 12: — | 13: X | 14: T | 15: — | 16: N | 17: — | 8: — | 9: 2 | A: 0 | B: 4 | ||||
18: W | 19: — | 1A: Z | 1B: — | 1C: P | 1D: — | 1E: — | 1F: — | C: — | D: 8 | E: 9 | F: — |
No field begins or ends with more than 3 consecutive 1 bits, guaranteeing that there are never more than 6 consecutive 1 bits. Guaranteeing the 5-bit limit on consecutive 0 bits is achieved by limiting the boundaries of the second and fourth fields to 3 consecutive 0 bits, and the first and third fields to 2 consecutive 0 bits:
- No field contains more than 5 consecutive 0 bits. Code 81, which would contain 6 consecutive 0 bits in field 1 or 4, is not used.
- Field 1 never ends in more than 2 consecutive 0 bits. Codes that end in 3 or more consecutive 0 bits encode the letters Z or W, which are not used for the first letter of postal codes.
- Field 2 may begin or end with at most 3 consecutive 0 bits.
- Field 3 never begins with more than 2 consecutive 0 bits, nor does it ever end with more than 1.
- Field 4 may begin with up to 3 consecutive 0 bits, and may end with up to 5 consecutive 0 bits, but is always followed by a 1 bit (the alignment bar).
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