Available workers.dev subdomains

This repository saves dated snapshots of short Cloudflare workers.dev account subdomains.

Cloudflare gives each account one configurable subdomain, such as your-name.workers.dev. Workers in that account then use addresses such as my-worker.your-name.workers.dev.

Coolest available now

This ranking is subjective. It favors mirrored spelling, repeated letters, and real or word-like sounds. No triple-letter label is available in the latest snapshot.

Rank	Label	Why it stands out
1	xrx	Mirrored, repeats x, and has a strong visual shape.
2	yiy	Mirrored, repeats y, and is easy to say letter by letter.
3	uyu	Mirrored, repeats u, and sounds like "oo-you".
4	zfz	Mirrored, with a sharp repeated z.
5	zpz	Mirrored and close in sound to "zips".
6	vkv	A clean mirrored consonant pattern.
7	wrw	Mirrored, with two wide w characters.
8	iyi	Mirrored and face-like.
9	woe	A short, memorable English word.
10	nub	A real word that also works as a compact handle.
11	urn	A recognizable three-letter English word.
12	fiv	Short and close in sound to "five".
13	buv	Compact and easy to pronounce.

Latest snapshot: 2026-08-21

• All 17,576 three-letter names from aaa through zzz were checked.
• 2,621 three-letter names remain in the latest available list.
• 0 candidates remained unresolved after retries.
• Compared with June 20, 2,599 names remained available, 22 became available, and 386 were no longer available.

Availability changes. A name in this repository is not reserved and might no longer be available.

Files

• data/available-three-letter-subdomains.txt is the June 20, 2026 list, with one account subdomain per line.
• data/sweep-2026-06-20.md is the original dated report.
• data/available-three-letter-subdomains-2026-08-21.txt is the latest clean list, with one available label per line. Add .workers.dev to get the full account domain.
• data/sweep-2026-08-21.md is the latest full report, including per-prefix counts and every available label.

How the list was made

The sweep generated every lowercase three-letter value and sent an authenticated, read-only request for each candidate:

GET /accounts/{account_id}/workers/subdomains/{candidate}

The responses observed during the sweep used these Cloudflare error codes:

• 10031: unavailable
• 10032: available but not configured

Temporary server errors, including rate-limit responses, were retried with throttling. The latest check confirmed all 26 first-letter groups, 2,621 unique available names, no duplicate names, and no unresolved requests.

Cloudflare documents how the account subdomain forms each Worker URL in its workers.dev documentation. The candidate-check endpoint used for this sweep is not in Cloudflare's public Workers Subdomains API reference as of August 21, 2026, so its behavior can change.