  Domain lists are a key ingredient for representative censuses of the Web.
Unfortunately, such censuses typically lack a view on domains under
country-code top-level domains (ccTLDs). This introduces unwanted bias: many
countries have a rich local Web that remains hidden if their ccTLDs are not
considered. The reason ccTLDs are rarely considered is that gaining access --
if possible at all -- is often laborious. To tackle this, we ask: what can we
learn about ccTLDs from public sources? We extract domain names under ccTLDs
from 6 years of public data from Certificate Transparency logs and Common
Crawl. We compare this against ground truth for 19 ccTLDs for which we have the
full DNS zone. We find that public data covers 43%-80% of these ccTLDs, and
that coverage grows over time. By also comparing port scan data we then show
that these public sources reveal a significant part of the Web presence under a
ccTLD. We conclude that in the absence of full access to ccTLDs, domain names
learned from public sources can be a good proxy when performing Web censuses.
