EPP-DRS communicates with various registries and SRS via it's modules.
You can find a list of pre-built modules below.
| Module | Supported Domain Extensions | Protocol | Reference | Configuration guide |
| Verisign COM/NET EPP | com, net | EPP (extended), WHOIS | Verisign | Configuration Guide |
| Affilias | info | EPP (extended) | Affilias | |
| Enom | Over 50 | Enom API/RRP | Enom | Configuration guide |
OnlineNIC (deprecated) | com, net, org, biz, info, us, in, cn, eu, cc, ws, mobi, tv, asia | OnlineNIC API | OnlineNIC | Supported till September 2010 |
| RRPProxy/KeySystems | Over 150 | RRPPRoxy API | RRPProxy | Configuration Guide |
| SRSPlus | com, net, biz, info, org, co.uk me.uk, org.uk, us, tv, cc, ws, bz, tc, gs, ms, vg | SRSPlus API | SRSPlus | Configuration Guide |
| CH | ch, li | EPP(extended) | SWITCH | Configuration Guide |
| COCCA | af, cx, dm, gs, gt, hm, ki, nf, tl, mn, na, pe, sb, as, ms | EPP | COCCA | |
| EU | eu | EPP(extended) | EURid | |
| FR (beta) | fr, re | EPP(extends) | Afnic | |
| GR | gr | EPP(extended) | EPP-Forth | Configuration Guide |
| LU | lu | EPP(extended) | DNS-LU | Configuration Guide |
| NL | nl | EPP(extended) | SIDN | |
| NG | ng | EPP | NiRA | Configuration Guide |
| NO | no | EPP | NORID | |
| SE | se | EPP | IIS | |
| TEL | tel | EPP (extended) | TELNIC | Configuration Guide |