Apex Root Domain CNAME Flattening: How to Point Root Domains to Cloud Services
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Published by ZodHost Engineering Team
Executive Summary & Key Takeaways
Understand RFC 1034 CNAME limitations on zone apexes and how modern DNS providers implement CNAME flattening / ANAME records.
Why RFC 1034 Forbids Root Domain CNAMEs
DNS providers implement CNAME Flattening (ALIAS/ANAME): the authoritative nameserver queries the target CNAME dynamically in real-time and responds to external resolvers with standard synthesized A/AAAA records.
Tags:
#CNAME flattening
#apex domain CNAME
#ANAME record
#RFC 1034 DNS
#point root domain CDN
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