Limits RegistryPUBLIC RECORDLimits RegistryResearch Console →Maximum ordinary UDP payload over IPv4 is 65507 bytes under UDP over IPv4 with a 20-byte IPv4 header and 8-byte UDP header. IPv4 options are excluded.
The question, scope, and sources behind this Registry record.
Under UDP over IPv4 with a 20-byte IPv4 header and 8-byte UDP header, what exact standards-defined value applies to UDP payload length?
Current frontiers derived from accepted Claims.
The accepted equality closes this optimization result.
Assertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.