Connect a domain by DNS provider
Step by step guides to connect a custom domain from each supported DNS provider, with the exact records and how each provider's setup works.
CustomDomain™ knows more than 150 DNS hosts, registrars and domain platforms, among them every one of the 100 largest registrars (by domains under management in ICANN's registry reports for May 2026). How a domain connects depends on what its provider offers: some support one click sign in, some take a scoped API key, and the rest use a guided flow where the app shows the exact records and verifies them for you.
How providers break down
The census routes every provider it lists to the best setup that provider supports. On 2026-09-29 it lists 154:
- 6 one-click sign-in (OAuth): you sign in to the provider and approve; no records to copy.
- 1 one-click setup (Domain Connect): you approve the change at the provider itself.
- 29 automatic (API key): you paste a scoped key once and the app writes the records.
- 118 guided manual: the app shows the exact records to add and verifies them automatically.
Most of the 118 are registrars, hosts and site builders that give no third party a way to change DNS, which is the honest shape of the ecosystem rather than a gap in one product. A few providers also have a second way in besides the one the census lists: Porkbun takes an approval at Porkbun instead of a key, Amazon Route 53 an access role, and Namecheap an API key for accounts that qualify. Glauca Digital and Domain Chief, which serve our one-click templates, are found through Domain Connect rather than listed in the census, and 11 more providers with a built-in adapter (Azure DNS and Linode among them) connect without a census entry. DNS providers has the full picture, including the sign-ins that are built but not switched on yet.
Whichever path applies, the app issues and renews TLS automatically and monitors for drift after the domain goes live.
Provider guides
These providers have a full walkthrough:
Nine have a page here. The rest do not need one to work: the connect flow shows you the exact records for your provider and verifies them either way, the widget shows step by step instructions for 125 providers and platforms, and Connect a custom domain covers the generic path end to end. A per-provider page exists where the provider's own dashboard is unusual enough that screenshots-in-prose save real time, so the queue is ordered by how often a provider actually turns up in support threads, not by market share. If yours is missing and its dashboard is the reason you are stuck, open an issue on CUSTOM-DOMAIN-APP/docs naming the provider, and say where the flow lost you.
The full catalog, including each provider's mode and dashboard URL, is served live at GET https://api.customdomain.ai/v1/providers/census. That endpoint is the source of truth for every census count on this page.
Managed DNS
Point a domain's nameservers at CustomDomain™ once, and every record after that is written for you. How DNS hosting works, the API, the limits, and how to run it yourself.
Connect a Cloudflare domain
Put a custom domain from Cloudflare on your app with automatic HTTPS. One-click (OAuth) setup, the exact DNS records, and how to verify it went live.