index_SYMBOL

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z]

/16 address block 
/24 address block 
/8 address block 
1+ 
10-10 codes
    PIC codes 
2B + D
    23B+D
        B (bearer channels) 
3DES 
555 numbers 
66-blocks  [See also punchdown blocks ]2nd