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NET Block assignments
wilderness




msg:4427870
 3:36 pm on Mar 11, 2012 (gmt 0)

Is anybody aware of reference URL?
OR
Perhaps has a list of common NET Block ranges?

A few days ago I began the following and was deterred with something more pressing

0-31
0-63
32-39
32-63
64-79
64-95
64-127
96-
112-127
128-139
128-143
128-191
192-207
192-223
228-231
224-255

Some of the Major North American Providers do not have their local ranges broken down within registration.
It's certainly possible to get a Class D via tracert, however that still does not provide a block range,

 

wilderness




msg:4427893
 6:56 pm on Mar 11, 2012 (gmt 0)

after some poking around, it's my understanding (based upon RFC 1981) and "Address Mapping".

The minimum block is 8 bits, which may also occur with specific Class Ranges.
The very minimum block would be an 8-bit in a Class D.

dstiles




msg:4427901
 8:10 pm on Mar 11, 2012 (gmt 0)

I get my basic range listings from
[iana.org...]
which is the official allocation list. Within that list there are various other delegations - ARIN and RIPE at least sometimes allocate outside their regions.

lucy24




msg:4427939
 10:27 pm on Mar 11, 2012 (gmt 0)

I've found assignments as small as 0-3 within D. Possibly not in the areas youse guys do business in, though.

If you've let your powers of 2 fall by the wayside, it's time to reactivate them.

:: shuffling papers ::

:: further trial & error because <pre> doesn't behave as expected ::

   0 
   0                              64
   0              32              64              96
   0      16      32      48      64      80      96     112
   0   8  16  24  32  40  48  56  64  72  80  88  96 104 112 120

 128
 128                             192
 128             160             192             224
 128     144     160     176     192     208     224     240
 128 136 144 152 160 168 176 184 192 200 208 216 224 232 240 248

   0
   0                              64
   0              32              64              96
   0      16      32      48      64      80      96     112
   0   8  16  24  32  40  48  56  64  72  80  88  96 104 112 120

 128
 128                             192
 128             160             192             224
 128     144     160     176     192     208     224     240
 128 136 144 152 160 168 176 184 192 200 208 216 224 232 240 248

   0
   0                              64
   0              32              64              96
   0      16      32      48      64      80      96     112
   0   8  16  24  32  40  48  56  64  72  80  88  96 104 112 120

 128
 128                             192
 128             160             192             224
 128     144     160     176     192     208     224     240
 128 136 144 152 160 168 176 184 192 200 208 216 224 232 240 248


OK, that's two more than necessary but I didn't trust it to work.

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