Costrar
Costrar is a drop-catch registrar based in Bulgaria. It is ICANN-accredited, with IANA ID 3971.
| Website | costrar.com |
|---|
API access
| Status | Blocked |
|---|---|
| API | Drop-catch/backorder accreditation, not a retail registrar for ordinary customers. |
About Costrar
| Headquarters | Bulgaria |
|---|---|
| Type | Drop-catch registrar |
| ICANN accreditation | IANA ID 3971 |
| Site languages | English |
| RDAP server | https://rdap.costrar.com/ |
Costrar in Lemon Domains
Bring Costrar domains into Lemon Domains by pasting the domain list or uploading a CSV export, next to the domains from every other registrar you use. Lemon Domains tracks expiry dates and lets your AI assistant answer questions about them through MCP.
Other registrars in Bulgaria
| Has an API | |
| Blocked | |
| Blocked | |
| Blocked | |
| Not reviewed | |
| Not reviewed |
Sources: the ICANN list of accredited registrars and the IANA registrar ID registry (refreshed 2026-10-24), and Costrar's own site and documentation (reviewed 2026-10-24). This page is also available as Markdown and JSON. Something out of date? Tell us.
Frequently asked questions
Is Costrar ICANN-accredited?
Yes. Costrar is on the ICANN list of accredited registrars, so it can register generic extensions such as .com directly with the registries.
What is Costrar's IANA ID?
3971. The IANA registrar ID appears in the registrar field of a domain's public record, so it shows which registrar a domain is with.
What other names does Costrar operate under?
Its accreditations are also held as Costrar EOOD. Domains registered through any of them can show those names as the registrar.
Does Costrar have an API?
Not one that account holders can use. Drop-catch/backorder accreditation, not a retail registrar for ordinary customers. Costrar domains come into Lemon Domains by paste or CSV import instead.