 A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| !Register It! (fees charged) | Submit | N/A |
| Ragtime Press Links (Music) | N/A | Search |
| Realty One (Real Estate) | N/A | Search |
| Recyclinx | Submit | Search |
| REX | Submit | Search |
| RCAAU Mondou (Japanese) | N/A | Search |
| RBSE's URL database | N/A | Search |
| Roman's Web Place | Submit | Search |
| Rand Corp. | N/A | Search |
| Ragno Italiano (Italian) | Submit | Search |
| Reference.COM (registration) | Submit | N/A |
| Rent-A-Wreck (auto rental) | N/A | Search |
| Rockguide | Submit | Search |
| Rockhall.com (rock and roll) | N/A | Search |
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ||
