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"Phil" == Phil Rosenthal <pr@isprime.com> writes:

Phil> http://info.us.bb.verio.net/routing.html#PeerFilter Phil> That's how Verio does it, and I assume, that's how most people Phil> who filter by length do it as well. We currently see 28804 /24 prefixes from our transits and peers which are not more-specifics of another prefix that we see. (We see 127981 prefixes in total at the moment, so that's 22.5% of our table). By comparison, we see 41066 /24 prefixes which are more-specifics for another prefix, which is 32.1% of the table. In total, /24s account for 54.6% of the routes we see. Of those 28804 isolated /24 routes, 946 are in "class A" space (0-127), 604 are in "class B" space (128-191), and the remaining 27254 are in "class C" space (192-223). The detailed breakdown by /8 is: /8 |/24 routes | /24 routes |with aggr. | isolated ====|===========|============= 4 39 0 12 722 0 13 1 0 15 6 0 16 1 0 17 2 0 20 5 1 24 706 117 25 0 1 32 94 0 38 50 0 40 23 0 43 1 0 44 2 0 55 1 0 57 11 0 61 281 32 62 360 82 63 1897 8 64 1693 102 65 2012 2 66 1918 250 67 328 35 68 381 13 69 206 71 80 218 197 81 233 31 82 15 4 128 68 26 129 149 3 130 60 2 131 63 13 132 11 8 134 107 5 135 6 4 136 176 2 137 88 21 138 65 1 139 41 9 140 131 1 141 125 11 142 92 1 143 46 0 144 79 7 145 32 1 146 145 124 147 54 12 148 287 4 149 68 11 150 120 1 151 58 2 152 219 2 153 57 1 154 7 0 155 125 4 156 53 5 157 39 4 158 139 1 159 127 16 160 43 3 161 56 13 162 182 180 163 59 4 164 111 14 165 129 23 166 87 9 167 285 19 168 163 12 169 86 8 170 298 17 171 8 0 192 582 4767 193 744 1703 194 672 1326 195 637 639 196 123 350 198 972 2499 199 1064 1763 200 1136 1877 201 1 0 202 1810 2229 203 1426 3775 204 1471 1488 205 1004 1028 206 1630 453 207 2116 370 208 2532 31 209 2294 485 210 761 130 211 320 60 212 642 275 213 611 360 214 15 0 215 22 0 216 2048 1203 217 629 424 218 95 16 219 33 0 220 113 2 221 13 0 222 0 1 -- Andrew, Supernews