Appendix A – IP Address Ranges
IP ranges are fields that allow multiple IP addresses to be specified using a shorthand notation. Four distinct forms of range are acceptable:
1.a.b.c.d
2.a.b.c.d-e
3.a.b.c.d-e.f.g.h
4.a.b.c.d/e
The first is simply a single IP address. Thus where ever a range is permitted, a single IP address is too.
The second specifies range of IP address from a.b.c.d to a.b.c.e inclusive, i.e. you are specifying a range within a C class network or subnet. For example,
The third form allows the address range to span network and subnet boundaries. All addresses including and between the two specified IP addresses are included in the range. For example,
The final form allows the range to be specified to cover an entire subnet. The value of e specified the number of fix bits in the IP address range. Thus, a.b.c.d/24 covers the entire C class network/subnet a.b.c.0 and is equivalent to specifying the range as
