Country codes: R
# Country codes: R

* A
* B
* C
* D–E
* F
* G
* H–I
* J–K
* L
* M
* N
* O–Q
* R
* S
* T
* U–Z

## Réunion (department of France)

| ISO 3166-1 numeric 638 | ISO 3166-1 alpha-3 REU | ISO 3166-1 alpha-2 RE | ICAO airport code prefix FME |
| - | - | - | - |
| E.164 code 262 | IOC country code — | Country code top-level domain .re | ICAO aircraft regis. prefix F- |
| E.212 mobile country code 647 | NATO three-letter code REU | NATO two-letter code RE | LOC MARC code RE |
| ITU Maritime ID 660 | ITU letter code REU | FIPS country code RE | License plate code F |
| GS1 GTIN prefix — | UNDP country code REU | WMO country code RE | ITU callsign prefixes — |

## Romania

| ISO 3166-1 numeric 642 | ISO 3166-1 alpha-3 ROU | ISO 3166-1 alpha-2 RO | ICAO airport code prefix LR |
| - | - | - | - |
| E.164 code 40 | IOC country code ROU | Country code top-level domain .ro | ICAO aircraft regis. prefix YR- |
| E.212 mobile country code 226 | NATO three-letter code ROU | NATO two-letter code RO | LOC MARC code RM |
| ITU Maritime ID 264 | ITU letter code ROU | FIPS country code RO | License plate code RO |
| GS1 GTIN prefix 594 | UNDP country code ROM | WMO country code RO | ITU callsign prefixes YOA-YRZ |

## Russia

| ISO 3166-1 numeric 643 | ISO 3166-1 alpha-3 RUS | ISO 3166-1 alpha-2 RU | ICAO airport code prefix UE, UH, UI, UL, UN UO, UR, US, UU, UW |
| - | - | - | - |
| E.164 code 7 | IOC country code RUS | Country code top-level domain .ru | ICAO aircraft regis. prefix RA- |
| E.212 mobile country code 250 | NATO three-letter code RUS | NATO two-letter code RS | LOC MARC code RU |
| ITU Maritime ID 273 | ITU letter code RUS | FIPS country code RS | License plate code RUS |
| GS1 GTIN prefix 460-469 | UNDP country code RUS | WMO country code RA, RS | ITU callsign prefixes RAA-RZZ, UAA-UIZ |

## Rwanda

| ISO 3166-1 numeric 646 | ISO 3166-1 alpha-3 RWA | ISO 3166-1 alpha-2 RW | ICAO airport code prefix HR |
| - | - | - | - |
| E.164 code 250 | IOC country code RWA | Country code top-level domain .rw | ICAO aircraft regis. prefix 9XR- |
| E.212 mobile country code 635 | NATO three-letter code RWA | NATO two-letter code RW | LOC MARC code RW |
| ITU Maritime ID 661 | ITU letter code RRW | FIPS country code RW | License plate code RWA |
| GS1 GTIN prefix — | UNDP country code RWA | WMO country code RW | ITU callsign prefixes 9XA-9XZ |
