Country & Region Codes
ISO 3166-1 country and region codes: Alpha-2, Alpha-3, numeric code and dialing code for China and major countries/regions.
| Country/Region | Alpha-2 | Alpha-3 | Numeric | Dial |
|---|---|---|---|---|
| China | CN | CHN | 156 | +86 |
| Hong Kong, China | HK | HKG | 344 | +852 |
| Macao, China | MO | MAC | 446 | +853 |
| Taiwan, China | TW | TWN | 158 | +886 |
| United States | US | USA | 840 | +1 |
| United Kingdom | GB | GBR | 826 | +44 |
| Japan | JP | JPN | 392 | +81 |
| South Korea | KR | KOR | 410 | +82 |
| Germany | DE | DEU | 276 | +49 |
| France | FR | FRA | 250 | +33 |
| Russia | RU | RUS | 643 | +7 |
| Canada | CA | CAN | 124 | +1 |
| Australia | AU | AUS | 036 | +61 |
| Brazil | BR | BRA | 076 | +55 |
| India | IN | IND | 356 | +91 |
| Italy | IT | ITA | 380 | +39 |
| Spain | ES | ESP | 724 | +34 |
| Netherlands | NL | NLD | 528 | +31 |
| Singapore | SG | SGP | 702 | +65 |
| Switzerland | CH | CHE | 756 | +41 |
Frequently Asked Questions
What is the difference between Alpha-2 and Alpha-3 in ISO 3166-1?
Both are two- and three-letter codes for the same country/region. Alpha-2 (e.g. CN) is shorter and used in TLDs and data exchange; Alpha-3 (e.g. CHN) is more readable and less ambiguous. The numeric code (e.g. 156) is script-independent, good for non-Latin systems.
What does the + mean before a dialing code?
"+" denotes the international access prefix, followed by the country code (e.g. +86). When dialing, "+" is replaced by the local prefix (00 in China, 011 in the US), e.g. +86 138... becomes 0086 138... from outside China.
Why do the US and Canada share +1?
The North American Numbering Plan (NANP) unifies the US, Canada and parts of the Caribbean under +1, distinguished by a 3-digit area code. So +1 is shared and does not uniquely identify the country.
Do the letter or numeric codes ever change?
Very rarely, but it happens: e.g. the breakup of Yugoslavia added new codes, and Sudan split into Sudan and South Sudan. The official list is maintained by ISO; refer to the latest version when needed.