14 blocks that belong to no host on the internet — 13.8 % of the address space, of which exactly one eighth is multicast and reserved
Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.
Three sizes in one archive — from a sheet on the fridge to a poster on the wall.
Addresses from these blocks are not routed on the internet: free inside your own network, useless outside it.
100.64.0.0/10 is Shared Address Space, and RFC 6598 says it outright: "distinct from RFC 1918 private address space", because it belongs to the Service Provider's network, not to yours. It holds 4,194,304 addresses — 4 times 172.16.0.0/12 and 64 times 192.168.0.0/16.
If the outside interface of your router carries an address from it, you are behind a carrier-grade NAT. RFC 6598 §5.1 names the consequence: an application that finds a special-purpose address on the outside of the CPE concludes the address is unreachable from the global internet, and behaves differently.
Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 9 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.
ten tasks, the year of each, the system, the figure — and the human it was measured against
who published each standard, when, what it does to the sound, and how many bits per second it allows
forty bits to a quantum: five bytes, eight characters and five padding cases
three bytes become four characters: the alphabet, the tail, and what the "=" at the end is for