This list shows all (ISO 3166 defined) countries listed in the five RIR service regions, AFRINIC, ARIN, APNIC, LACNIC and RIPE NCC.
| Country | A 2 | A 3 | Region |
| ÅLAND ISLANDS | AX | ALA | RIPE NCC |
| AFGHANISTAN | AF | AFG | APNIC |
| ALBANIA | AL | ALB | RIPE NCC |
| ALGERIA | DZ | DZA | AFRINIC |
| AMERICAN SAMOA | AS | ASM | APNIC |
| ANDORRA | AD | AND | RIPE NCC |
| ANGOLA | AO | AGO | AFRINIC |
| ANGUILLA | AI | AIA | ARIN |
| ANTARCTICA | AQ | ATA | ARIN |
| ANTIGUA AND BARBUDA | AG | ATG | ARIN |
| ARGENTINA | AR | ARG | LACNIC |
| ARMENIA | AM | ARM | RIPE NCC |
| ARUBA | AW | ABW | LACNIC |
| AUSTRALIA | AU | AUS | APNIC |
| AUSTRIA | AT | AUT | RIPE NCC |
| AZERBAIJAN | AZ | AZE | RIPE NCC |
| BAHAMAS | BS | BHS | ARIN |
| BAHRAIN | BH | BHR | RIPE NCC |
| BANGLADESH | BD | BGD | APNIC |
| BARBADOS | BB | BRB | ARIN |
| BELARUS | BY | BLR | RIPE NCC |
| BELGIUM | BE | BEL | RIPE NCC |
| BELIZE | BZ | BLZ | LACNIC |
| BENIN | BJ | BEN | AFRINIC |
| BERMUDA | BM | BMU | ARIN |
| BHUTAN | BT | BTN | APNIC |
| BOLIVIA | BO | BOL | LACNIC |
| BOSNIA AND HERZEGOWINA | BA | BIH | RIPE NCC |
| BOTSWANA | BW | BWA | AFRINIC |
| BOUVET ISLAND | BV | BVT | ARIN |
| BRAZIL | BR | BRA | LACNIC |
| BRITISH INDIAN OCEAN TERRITORY | IO | IOT | APNIC |
| BRUNEI DARUSSALAM | BN | BRN | APNIC |
| BULGARIA | BG | BGR | RIPE NCC |
| BURKINA FASO | BF | BFA | AFRINIC |
| BURUNDI | BI | BDI | AFRINIC |
| CAMBODIA | KH | KHM | APNIC |
| CAMEROON | CM | CMR | AFRINIC |
| CANADA | CA | CAN | ARIN |
| CAPE VERDE | CV | CPV | AFRINIC |
| CAYMAN ISLANDS | KY | CYM | ARIN |
| CENTRAL AFRICAN REPUBLIC | CF | CAF | AFRINIC |
| CHAD | TD | TCD | AFRINIC |
| CHILE | CL | CHL | LACNIC |
| CHINA | CN | CHN | APNIC |
| CHRISTMAS ISLAND | CX | CXR | APNIC |
| COCOS (KEELING) ISLANDS | CC | CCK | APNIC |
| COLOMBIA | CO | COL | LACNIC |
| COMOROS | KM | COM | AFRINIC |
| CONGO | CG | COG | AFRINIC |
| CONGO, THE DEMOCRATIC REPUBLIC OF THE | CD | COD | AFRINIC |
| COOK ISLANDS | CK | COK | APNIC |
| COSTA RICA | CR | CRI | LACNIC |
| COTE D’IVOIRE | CI | CIV | AFRINIC |
| CROATIA (local name: Hrvatska) | HR | HRV | RIPE NCC |
| CUBA | CU | CUB | LACNIC |
| CYPRUS | CY | CYP | RIPE NCC |
| CZECH REPUBLIC | CZ | CZE | RIPE NCC |
| DENMARK | DK | DNK | RIPE NCC |
| DJIBOUTI | DJ | DJI | AFRINIC |
| DOMINICA | DM | DMA | ARIN |
| DOMINICAN REPUBLIC | DO | DOM | LACNIC |
| EAST TIMOR | TL | TLS | APNIC |
| ECUADOR | EC | ECU | LACNIC |
| EGYPT | EG | EGY | AFRINIC |
| EL SALVADOR | SV | SLV | LACNIC |
| EQUATORIAL GUINEA | GQ | GNQ | AFRINIC |
| ERITREA | ER | ERI | AFRINIC |
| ESTONIA | EE | EST | RIPE NCC |
| ETHIOPIA | ET | ETH | AFRINIC |
| FALKLAND ISLANDS (MALVINAS) | FK | FLK | LACNIC |
| FAROE ISLANDS | FO | FRO | RIPE NCC |
| FIJI | FJ | FJI | APNIC |
| FINLAND | FI | FIN | RIPE NCC |
| FRANCE | FR | FRA | RIPE NCC |
| FRENCH GUIANA | GF | GUF | LACNIC |
| FRENCH POLYNESIA | PF | PYF | APNIC |
| FRENCH SOUTHERN TERRITORIES | TF | ATF | APNIC |
| GABON | GA | GAB | AFRINIC |
| GAMBIA | GM | GMB | AFRINIC |
| GEORGIA | GE | GEO | RIPE NCC |
| GERMANY | DE | DEU | RIPE NCC |
| GHANA | GH | GHA | AFRINIC |
| GIBRALTAR | GI | GIB | RIPE NCC |
| GREECE | GR | GRC | RIPE NCC |
| GREENLAND | GL | GRL | RIPE NCC |
| GRENADA | GD | GRD | ARIN |
| GUADELOUPE | GP | GLP | ARIN |
| GUAM | GU | GUM | APNIC |
| GUATEMALA | GT | GTM | LACNIC |
| GUINEA | GN | GIN | AFRINIC |
| GUINEA-BISSAU | GW | GNB | AFRINIC |
| GUYANA | GY | GUY | LACNIC |
| HAITI | HT | HTI | LACNIC |
| HEARD AND MC DONALD ISLANDS | HM | HMD | ARIN |
| HOLY SEE (VATICAN CITY STATE) | VA | VAT | RIPE NCC |
| HONDURAS | HN | HND | LACNIC |
| HONG KONG | HK | HKG | APNIC |
| HUNGARY | HU | HUN | RIPE NCC |
| ICELAND | IS | ISL | RIPE NCC |
| INDIA | IN | IND | APNIC |
| INDONESIA | ID | IDN | APNIC |
| IRAN (ISLAMIC REPUBLIC OF) | IR | IRN | RIPE NCC |
| IRAQ | IQ | IRQ | RIPE NCC |
| IRELAND | IE | IRL | RIPE NCC |
| ISRAEL | IL | ISR | RIPE NCC |
| ITALY | IT | ITA | RIPE NCC |
| JAMAICA | JM | JAM | ARIN |
| JAPAN | JP | JPN | APNIC |
| JORDAN | JO | JOR | RIPE NCC |
| KAZAKHSTAN | KZ | KAZ | RIPE NCC |
| KENYA | KE | KEN | AFRINIC |
| KIRIBATI | KI | KIR | APNIC |
| KOREA, DEMOCRATIC PEOPLE’S REPUBLIC OF | KP | PRK | APNIC |
| KOREA, REPUBLIC OF | KR | KOR | APNIC |
| KUWAIT | KW | KWT | RIPE NCC |
| KYRGYZSTAN | KG | KGZ | RIPE NCC |
| LAO PEOPLE’S DEMOCRATIC REPUBLIC | LA | LAO | APNIC |
| LATVIA | LV | LVA | RIPE NCC |
| LEBANON | LB | LBN | RIPE NCC |
| LESOTHO | LS | LSO | AFRINIC |
| LIBERIA | LR | LBR | AFRINIC |
| LIBYAN ARAB JAMAHIRIYA | LY | LBY | AFRINIC |
| LIECHTENSTEIN | LI | LIE | RIPE NCC |
| LITHUANIA | LT | LTU | RIPE NCC |
| LUXEMBOURG | LU | LUX | RIPE NCC |
| MACAO | MO | MAC | APNIC |
| MACEDONIA, THE FORMER YUGOSLAV REPUBLIC OF | MK | MKD | RIPE NCC |
| MADAGASCAR | MG | MDG | AFRINIC |
| MALAWI | MW | MWI | AFRINIC |
| MALAYSIA | MY | MYS | APNIC |
| MALDIVES | MV | MDV | APNIC |
| MALI | ML | MLI | AFRINIC |
| MALTA | MT | MLT | RIPE NCC |
| MARSHALL ISLANDS | MH | MHL | APNIC |
| MARTINIQUE | MQ | MTQ | ARIN |
| MAURITANIA | MR | MRT | AFRINIC |
| MAURITIUS | MU | MUS | AFRINIC |
| MAYOTTE | YT | MYT | AFRINIC |
| MEXICO | MX | MEX | LACNIC |
| MICRONESIA, FEDERATED STATES OF | FM | FSM | APNIC |
| MOLDOVA, REPUBLIC OF | MD | MDA | RIPE NCC |
| MONACO | MC | MCO | RIPE NCC |
| MONGOLIA | MN | MNG | APNIC |
| MONTSERRAT | MS | MSR | ARIN |
| MOROCCO | MA | MAR | AFRINIC |
| MOZAMBIQUE | MZ | MOZ | AFRINIC |
| MYANMAR | MM | MMR | APNIC |
| NAMIBIA | NA | NAM | AFRINIC |
| NAURU | NR | NRU | APNIC |
| NEPAL | NP | NPL | APNIC |
| NETHERLANDS | NL | NLD | RIPE NCC |
| NETHERLANDS ANTILLES | AN | ANT | LACNIC |
| NEW CALEDONIA | NC | NCL | APNIC |
| NEW ZEALAND | NZ | NZL | APNIC |
| NICARAGUA | NI | NIC | LACNIC |
| NIGER | NE | NER | AFRINIC |
| NIGERIA | NG | NGA | AFRINIC |
| NIUE | NU | NIU | APNIC |
| NORFOLK ISLAND | NF | NFK | APNIC |
| NORTHERN MARIANA ISLANDS | MP | MNP | APNIC |
| NORWAY | NO | NOR | RIPE NCC |
| OMAN | OM | OMN | RIPE NCC |
| PAKISTAN | PK | PAK | APNIC |
| PALAU | PW | PLW | APNIC |
| PALESTINIAN TERRITORY, OCCUPIED | PS | PSE | RIPE NCC |
| PANAMA | PA | PAN | LACNIC |
| PAPUA NEW GUINEA | PG | PNG | APNIC |
| PARAGUAY | PY | PRY | LACNIC |
| PERU | PE | PER | LACNIC |
| PHILIPPINES | PH | PHL | APNIC |
| PITCAIRN | PN | PCN | APNIC |
| POLAND | PL | POL | RIPE NCC |
| PORTUGAL | PT | PRT | RIPE NCC |
| PUERTO RICO | PR | PRI | ARIN |
| QATAR | QA | QAT | RIPE NCC |
| REUNION | RE | REU | APNIC |
| ROMANIA | RO | ROU | RIPE NCC |
| RUSSIAN FEDERATION | RU | RUS | RIPE NCC |
| RWANDA | RW | RWA | AFRINIC |
| SAINT KITTS AND NEVIS | KN | KNA | ARIN |
| SAINT LUCIA | LC | LCA | ARIN |
| SAINT VINCENT AND THE GRENADINES | VC | VCT | ARIN |
| SAMOA | WS | WSM | APNIC |
| SAN MARINO | SM | SMR | RIPE NCC |
| SAO TOME AND PRINCIPE | ST | STP | AFRINIC |
| SAUDI ARABIA | SA | SAU | RIPE NCC |
| SENEGAL | SN | SEN | AFRINIC |
| SERBIA AND MONTENEGRO | CS | SCG | RIPE NCC |
| SEYCHELLES | SC | SYC | AFRINIC |
| SIERRA LEONE | SL | SLE | AFRINIC |
| SINGAPORE | SG | SGP | APNIC |
| SLOVAKIA (S | SK | SVK | RIPE NCC |
| SLOVENIA | SI | SVN | RIPE NCC |
| SOLOMON ISLANDS | SB | SLB | APNIC |
| SOMALIA | SO | SOM | AFRINIC |
| SOUTH AFRICA | ZA | ZAF | AFRINIC |
| SOUTH GEORGIA AND THE SOUTH SANDWICH ISLANDS | GS | SGS | LACNIC |
| SPAIN | ES | ESP | RIPE NCC |
| SRI LANKA | LK | LKA | APNIC |
| ST. HELENA | SH | SHN | ARIN |
| ST. PIERRE AND MIQUELON | PM | SPM | ARIN |
| SUDAN | SD | SDN | AFRINIC |
| SURINAME | SR | SUR | LACNIC |
| SVALBARD AND JAN MAYEN ISLANDS | SJ | SJM | RIPE NCC |
| SWAZILAND | SZ | SWZ | AFRINIC |
| SWEDEN | SE | SWE | RIPE NCC |
| SWITZERLAND | CH | CHE | RIPE NCC |
| SYRIAN ARAB REPUBLIC | SY | SYR | RIPE NCC |
| TAIWAN, PROVINCE OF CHINA | TW | TWN | APNIC |
| TAJIKISTAN | TJ | TJK | RIPE NCC |
| TANZANIA, UNITED REPUBLIC OF | TZ | TZA | AFRINIC |
| THAILAND | TH | THA | APNIC |
| TOGO | TG | TGO | AFRINIC |
| TOKELAU | TK | TKL | APNIC |
| TONGA | TO | TON | APNIC |
| TRINIDAD AND TOBAGO | TT | TTO | LACNIC |
| TUNISIA | TN | TUN | AFRINIC |
| TURKEY | TR | TUR | RIPE NCC |
| TURKMENISTAN | TM | TKM | RIPE NCC |
| TURKS AND CAICOS ISLANDS | TC | TCA | ARIN |
| TUVALU | TV | TUV | APNIC |
| UGANDA | UG | UGA | AFRINIC |
| UKRAINE | UA | UKR | RIPE NCC |
| UNITED ARAB EMIRATES | AE | ARE | RIPE NCC |
| UNITED KINGDOM* | GB | GBR | RIPE NCC |
| UNITED STATES | US | USA | ARIN |
| UNITED STATES MINOR OUTLYING ISLANDS | UM | UMI | ARIN |
| URUGUAY | UY | URY | LACNIC |
| UZBEKISTAN | UZ | UZB | RIPE NCC |
| VANUATU | VU | VUT | APNIC |
| VENEZUELA | VE | VEN | LACNIC |
| VIET NAM | VN | VNM | APNIC |
| VIRGIN ISLANDS (BRITISH) | VG | VGB | ARIN |
| VIRGIN ISLANDS (U.S.) | VI | VIR | ARIN |
| WALLIS AND FUTUNA ISLANDS | WF | WLF | APNIC |
| WESTERN SAHARA | EH | ESH | AFRINIC |
| YEMEN | YE | YEM | RIPE NCC |
| ZAMBIA | ZM | ZMB | AFRINIC |
| ZIMBABWE | ZW | ZWE | AFRINIC |
| * Please note the RIPE NCC uses the prefix uk. for registries in the United Kingdom. | |||