Choosing TLDs
By level
--level filters the --tld list by where the name would actually sit:
| Value | Keeps | Count under --tld all |
|---|---|---|
any (default) |
everything | 1659 |
second |
plain TLDs — apple.com, apple.de |
1274 |
third |
multi-label suffixes — apple.co.uk, apple.com.au |
385 |
Handy for --tld all, which otherwise sweeps hundreds of restricted zones
(gov.bd, ernet.in, edu.gt) you cannot register under anyway. A full domain
typed out by hand is always checked as given — --level only filters TLD lists.
By length
--cctld keeps only country-code TLDs — the two-letter ones, which is exactly
what ICANN reserves for ISO 3166-1 country codes:
ds apple --tld all --cctld # 505 (includes co.uk, com.au, ...)
ds apple --tld all --cctld --level second # 140 bare ccTLDs: de, io, jp, ...--tld-len is the general form, measured on the last label so co.uk counts
as 2:
| Spec | Keeps | Count under --tld all |
|---|---|---|
--tld-len 2 |
two-letter (same as --cctld) |
505 |
--tld-len 3 |
com, net, xyz, … |
236 |
--tld-len -3 |
three characters or fewer | 741 |
--tld-len 4- |
four or more | 918 |
These pages are generated from the project README, so they never drift from what ships with the binary.