Costdomain.Com
Costdomain.Com is a drop-catch registrar based in the United States. It is ICANN-accredited, with IANA ID 3974.
| Website | costdomain.com |
|---|
API access
| Status | Blocked |
|---|---|
| API | Registers dropped domains for an expiry-auction operation rather than selling to the public. |
| Notes | One of five sibling accreditations with sequential IANA ids and matching legal names. |
About Costdomain.Com
| Headquarters | United States |
|---|---|
| Type | Drop-catch registrar |
| ICANN accreditation | IANA ID 3974 |
| RDAP server | https://rdapserver.net/ |
Costdomain.Com in Lemon Domains
Bring Costdomain.Com 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 United States
| Integrated | |
| Integrated | |
| Integrated | |
| Integrated | |
| Blocked | |
| Blocked |
Sources: the ICANN list of accredited registrars and the IANA registrar ID registry (refreshed 2026-10-24), and Costdomain.Com'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 Something out of date?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 Costdomain.Com ICANN-accredited?
Yes. Costdomain.Com is on the ICANN list of accredited registrars, so it can register generic extensions such as .com directly with the registries.
What is Costdomain.Com's IANA ID?
3974. The IANA registrar ID appears in the registrar field of a domain's public record, so it shows which registrar a domain is with.
Does Costdomain.Com have an API?
Not one that account holders can use. Registers dropped domains for an expiry-auction operation rather than selling to the public. Costdomain.Com domains come into Lemon Domains by paste or CSV import instead.