A deep dive into how many consecutive hyphens are technically allowed in a domain name, tracing the rules from 1978's early ARPANET host name specs through RFC 952, RFC 1035, RFC 1123, and finally RFC 5891 (which introduced the xn-- Punycode restriction). In theory, up to 59–61 consecutive hyphens are permissible under current standards, provided they don't appear in positions 3–4 (unless prefixed with 'xn'). Individual TLD registries can impose stricter rules — South Sudan's .ss bans hyphens entirely, while Nominet's .uk only blocks xn-- domains. A curated table of real multi-hyphenated domains found in DNS records shows many were registered around 1999–2001, some still live today, including one with 61 consecutive hyphens.
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