Limits RegistryPUBLIC RECORD
Limits RegistryOn 1 January 1983 the ARPANET made an irreversible, coordinated transition from the Network Control Program to TCP/IP, as planned in RFC 801. The 'flag day' is often treated as the birth of the modern Internet, since every host thereafter spoke the protocols still in use today.
The question, scope, and sources behind this Registry record.
On 1 January 1983 the ARPANET made an irreversible, coordinated transition from the Network Control Program to TCP/IP, as planned in RFC 801. The 'flag day' is often treated as the birth of the modern Internet, since every host thereafter spoke the protocols still in use today.
The year the ARPANET completed its coordinated cutover to TCP/IP, the protocol suite of today's Internet.
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Current frontiers derived from accepted Claims.
An observed or demonstrated result; no opposing bound is implied.
The frontier is not sacred
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≥ when you have shown that at least this value is achievable.≤ when you have shown that anything above this value is impossible.No vibes. State the value, define the scope, and link the paper, proof, code, or reproduction that lets another person check it. Editors review every challenge before the public record changes.
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The frontier as it changed over time.
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Permanent ID limitsregistry.com/limits/LR-ARPANET-TCP-IP-FLAG-DAY
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Limits Registry. LR-ARPANET-TCP-IP-FLAG-DAY. ARPANET switch to TCP/IP. 2026.