| AFG Afghanistan | 4 digits | 1001 | |
| ALA Åland Islands | 22 + 3 digits | 22100 | |
| ALB Albania | 4 digits | 1001 | |
| DZA Algeria | 5 digits | 16000 | |
| ASM American Samoa | 96799 with optional 4-digit ext | 96799-1234 | |
| AND Andorra | AD + digit 1-7 + 0 + digit | AD100 | |
| AIA Anguilla | Optional AI- + 2640 | AI-2640 | |
| ARG Argentina | Optional letter + 4 digits + optional 3 letters | C1234ABC | |
| ARM Armenia | Optional 37 + 4 digits | 0010 | |
| AUS Australia | 4 digits | 2000 | |
| AUT Austria | 4 digits | 1010 | |
| AZE Azerbaijan | 4 digits | 1000 | |
| BHR Bahrain | 3-4 digits (first 0-12) | 0317 | |
| BGD Bangladesh | 4 digits | 1205 | |
| BRB Barbados | BB + 5 digits | BB15028 | |
| BLR Belarus | 6 digits | 220004 | |
| BEL Belgium | 4 digits | 1000 | |
| BMU Bermuda | 2 letters + space? + 2 alphanumerics | HM 08 | |
| BTN Bhutan | 5 digits | 11001 | |
| BIH Bosnia and Herzegovina | 5 digits | 71000 | |
| BRA Brazil | 5 digits + optional hyphen + 3 digits | 01001-000 | |
| IOT British Indian Ocean Terr. | BBND 1ZZ | BBND 1ZZ | |
| BRN Brunei | 2 letters + space? + 4 digits | KA1131 | |
| BGR Bulgaria | 4 digits | 1000 | |
| CPV Cabo Verde | 4 digits | 7600 | |
| KHM Cambodia | 5-6 digits | 12000 | |
| CAN Canada | Letter-digit-letter space? digit-letter-digit | K1A 0B1 | |
| CYM Cayman Islands | KY + digit + - + 4 digits | KY1-1001 | |
| CHL Chile | 7 digits | 8320000 | |
| CHN China | 6 digits | 100000 | |
| CXR Christmas Island | 6798 | 6798 | |
| CCK Cocos Islands | 6799 | 6799 | |
| COL Colombia | 6 digits | 110111 | |
| CRI Costa Rica | 4-5 digits or 3-4 hyphenated | 10101 | |
| HRV Croatia | 5 digits | 10000 | |
| CUB Cuba | 5 digits | 10400 | |
| CYP Cyprus | 4 digits, or 5 digits starting 95-99 (N. Cyprus) | 1010 or 99010 | |
| CZE Czechia | 3 digits + space? + 2 digits | 110 00 | |
| DNK Denmark | 4 digits | 1050 | |
| DOM Dominican Republic | 5 digits | 10101 | |
| ECU Ecuador | 6 digits | 170150 | |
| EGY Egypt | 5 or 7 digits | 11511 or 1151101 | |
| SLV El Salvador | Optional CP/CP-/CP + [1-3][1-7][0-2]d | CP1101 | |
| EST Estonia | 5 digits | 10111 | |
| SWZ Eswatini | Letter (H/L/M/S) + 3 digits | H100 | |
| ETH Ethiopia | 4 digits | 1000 | |
| FLK Falkland Islands | FIQQ 1ZZ | FIQQ 1ZZ | |
| FRO Faroe Islands | 3 digits | 100 | |
| FIN Finland | 5 digits | 00100 | |
| FRA France | 2 digits + space? + 3 digits | 75001 | |
| GUF French Guiana | 973/983 + 2 digits | 97300 | |
| PYF French Polynesia | 987 + 2 digits | 98714 | |
| GEO Georgia | 4 digits | 0105 | |
| DEU Germany | 5 digits | 10115 | |
| GIB Gibraltar | GX11 1AA | GX11 1AA | |
| GRC Greece | 3 digits + space? + 2 digits | 105 57 | |
| GRL Greenland | 39 + 2 digits | 3900 | |
| GLP Guadeloupe | 970/971/980/981 + 2 digits | 97100 | |
| GUM Guam | `969[12x | 3[12]]` + optional ext | 96910 |
| GTM Guatemala | 5 digits | 01001 | |
| GGY Guernsey | UK-style, GY prefix | GY1 1AA | |
| GIN Guinea | 3 digits | 001 | |
| GNB Guinea-Bissau | 4 digits | 1000 | |
| HTI Haiti | 4 digits | 6110 | |
| HMD Heard Island | 4 digits | 7151 | |
| VAT Holy See | 00120 | 00120 | |
| HND Honduras | 5 digits | 11101 | |
| HUN Hungary | 4 digits | 1011 | |
| ISL Iceland | 3 digits | 101 | |
| IND India | 6 digits | 110001 | |
| IDN Indonesia | 5 digits | 10110 | |
| IRN Iran | 5 digits + optional hyphen + 5 digits | 11365-44543 | |
| IRQ Iraq | 5 digits | 10001 | |
| IRL Ireland | 3 alphanumerics + space? + 4 alphanumerics (Eircode) | D02 AF30 | |
| IMN Isle of Man | UK-style, IM prefix | IM1 1AA | |
| ISR Israel | 5 or 7 digits | 6100000 | |
| ITA Italy | 5 digits | 00100 | |
| JPN Japan | 3 digits + optional hyphen + 4 digits | 100-0001 | |
| JEY Jersey | UK-style, JE prefix | JE2 3AA | |
| JOR Jordan | 5 digits | 11110 | |
| KAZ Kazakhstan | 6 digits or 7 alphanumerics | 050000 or A10A5B2 | |
| KEN Kenya | 5 digits | 00100 | |
| KOR South Korea | 5 digits | 03051 | |
| KWT Kuwait | 5 digits | 13001 | |
| KGZ Kyrgyzstan | 6 digits | 720001 | |
| LAO Laos | 5 digits | 01000 | |
| LVA Latvia | Optional LV/LV-/LV + 4 digits | LV-1050 | |
| LBN Lebanon | 4 digits + optional space + 4 digits | 1100 2010 | |
| LSO Lesotho | 3 digits | 100 | |
| LBR Liberia | 4 digits | 1000 | |
| LIE Liechtenstein | 9485-9498 | 9490 | |
| LTU Lithuania | 5 digits | 01001 | |
| LUX Luxembourg | 4 digits | 1009 | |
| MDG Madagascar | 3 digits | 101 | |
| MYS Malaysia | 5 digits | 50000 | |
| MDV Maldives | 5 digits | 20002 | |
| MLT Malta | 3 letters + space? + 2-4 digits | VLT 1535 | |
| MHL Marshall Islands | 9696x/9697x + optional ext | 96960 | |
| MTQ Martinique | 972/982 + 2 digits | 97200 | |
| MUS Mauritius | 3 digits or 2-letter+3-digit combo | 11302 | |
| MYT Mayotte | 976 + 2 digits | 97600 | |
| MEX Mexico | 5 digits | 06600 | |
| FSM Micronesia | 96941-96944 + optional ext | 96941 | |
| MDA Moldova | 4 digits | 2001 | |
| MCO Monaco | 980 + 2 digits | 98000 | |
| MNG Mongolia | 5 digits | 14200 | |
| MNE Montenegro | 8 + 4 digits | 81000 | |
| MAR Morocco | 5 digits | 20000 | |
| MOZ Mozambique | 4 digits | 1100 | |
| MMR Myanmar | 5 digits | 11121 | |
| NAM Namibia | 5 digits | 10001 | |
| NPL Nepal | 5 digits | 44600 | |
| NLD Netherlands | 4 digits + space? + 2 letters | 1011 AB | |
| NCL New Caledonia | 988 + 2 digits | 98800 | |
| NZL New Zealand | 4 digits | 6011 | |
| NIC Nicaragua | 5 digits | 11001 | |
| NER Niger | 4 digits | 8000 | |
| NGA Nigeria | 6 digits | 100001 | |
| NFK Norfolk Island | 2899 | 2899 | |
| MKD North Macedonia | 4 digits | 1000 | |
| MNP N. Mariana Islands | 96950-96952 + optional ext | 96950 | |
| NOR Norway | 4 digits | 0101 | |
| OMN Oman | Optional PC + 3 digits | PC 112 | |
| PAK Pakistan | 5 digits | 44000 | |
| PLW Palau | 96939/96940 + optional ext | 96940 | |
| PNG Papua New Guinea | 3 digits | 111 | |
| PRY Paraguay | 6 digits | 001001 | |
| PER Peru | LIMA + digits, CALLAO + digits, or 5 digits | LIMA 01 or 15001 | |
| PHL Philippines | 4 digits | 1000 | |
| PCN Pitcairn | PCRN 1ZZ | PCRN 1ZZ | |
| POL Poland | 2 digits + - + 3 digits | 00-001 | |
| PRT Portugal | 4 digits + - + 3 digits | 1000-001 | |
| PRI Puerto Rico | 006xx-009xx + optional ext | 00901-1234 | |
| REU Réunion | 974/984 + 2 digits | 97400 | |
| ROU Romania | 6 digits | 010011 | |
| RUS Russia | 6 digits | 101000 | |
| BLM Saint Barthélemy | 970/971/980/981 + 2 digits | 97133 | |
| SHN St Helena | ASCN 1ZZ or STHL 1ZZ | STHL 1ZZ | |
| MAF Saint Martin (FR) | 970/971/980/981 + 2 digits | 97150 | |
| SPM Saint Pierre/Miquelon | 975/985 + 2 digits | 97500 | |
| VCT St Vincent | VC + 4 digits | VC0100 | |
| SMR San Marino | 4789 + digit | 47890 | |
| SAU Saudi Arabia | 5 digits | 11564 | |
| SEN Senegal | 5 digits | 12500 | |
| SRB Serbia | 5-6 digits | 11000 | |
| SGP Singapore | 6 digits | 018956 | |
| SVK Slovakia | 3 digits + space? + 2 digits | 811 01 | |
| SVN Slovenia | 4 digits | 1000 | |
| SOM Somalia | 2 letters + space? + 5 digits | JH 09010 | |
| ZAF South Africa | 4 digits | 2001 | |
| SGS S. Georgia | SIQQ 1ZZ | SIQQ 1ZZ | |
| ESP Spain | 5 digits | 28001 | |
| LKA Sri Lanka | 5 digits | 10100 | |
| SDN Sudan | 5 digits | 11111 | |
| SJM Svalbard | 4 digits | 9171 | |
| SWE Sweden | 3 digits + space? + 2 digits | 111 22 | |
| CHE Switzerland | 4 digits | 3000 | |
| TWN Taiwan | 3-6 digits | 100 or 10048 | |
| TJK Tajikistan | 6 digits | 734001 | |
| TZA Tanzania | 4-5 digits | 11101 | |
| THA Thailand | 5 digits | 10200 | |
| TUN Tunisia | 4 digits | 1000 | |
| TUR Türkiye | 5 digits | 06100 | |
| TKM Turkmenistan | 6 digits | 744000 | |
| TCA Turks and Caicos | TKCA 1ZZ | TKCA 1ZZ | |
| UKR Ukraine | 5 digits | 01001 | |
| GBR United Kingdom | UK postcode format (e.g. AB12 3CD) | SW1A 1AA | |
| USA United States | 5 digits + optional space/hyphen + 4 digits | 94103 or 94103-0000 | |
| UMI US Minor Outlying Islands | 96898 | 96898 | |
| URY Uruguay | 5 digits | 11000 | |
| UZB Uzbekistan | 6 digits | 100000 | |
| VEN Venezuela | 4 digits | 1010 | |
| VNM Viet Nam | 5-6 digits | 10000 | |
| VGB British Virgin Islands | VG + 4 digits | VG1110 | |
| VIR US Virgin Islands | 008xx + optional ext | 00801 | |
| WLF Wallis and Futuna | 986 + 2 digits | 98600 | |
| ESH Western Sahara | 5 digits | 70000 | |
| ZMB Zambia | 5 digits | 10101 | |