IPv4 calculator

Subnet details, /30·/31·/32 planning, splitting, masks, private IPs, overlap check.

What it is for

From a pool (e.g. /24) generate /30 (classic P2P), /31 (RFC 3021) or /32 rows.

Why it helps

Clean P2P / transit addressing without overlaps and with clear slot numbers.

Pool and mode

Results

Network192.0.2.0/24
Slots64
Mode/30
# Prefix Side A Side B Note
0 192.0.2.0/30 192.0.2.1 192.0.2.2 net 192.0.2.0 · bcast 192.0.2.3
1 192.0.2.4/30 192.0.2.5 192.0.2.6 net 192.0.2.4 · bcast 192.0.2.7
2 192.0.2.8/30 192.0.2.9 192.0.2.10 net 192.0.2.8 · bcast 192.0.2.11
3 192.0.2.12/30 192.0.2.13 192.0.2.14 net 192.0.2.12 · bcast 192.0.2.15
4 192.0.2.16/30 192.0.2.17 192.0.2.18 net 192.0.2.16 · bcast 192.0.2.19
5 192.0.2.20/30 192.0.2.21 192.0.2.22 net 192.0.2.20 · bcast 192.0.2.23
6 192.0.2.24/30 192.0.2.25 192.0.2.26 net 192.0.2.24 · bcast 192.0.2.27
7 192.0.2.28/30 192.0.2.29 192.0.2.30 net 192.0.2.28 · bcast 192.0.2.31
8 192.0.2.32/30 192.0.2.33 192.0.2.34 net 192.0.2.32 · bcast 192.0.2.35
9 192.0.2.36/30 192.0.2.37 192.0.2.38 net 192.0.2.36 · bcast 192.0.2.39
10 192.0.2.40/30 192.0.2.41 192.0.2.42 net 192.0.2.40 · bcast 192.0.2.43
11 192.0.2.44/30 192.0.2.45 192.0.2.46 net 192.0.2.44 · bcast 192.0.2.47
12 192.0.2.48/30 192.0.2.49 192.0.2.50 net 192.0.2.48 · bcast 192.0.2.51
13 192.0.2.52/30 192.0.2.53 192.0.2.54 net 192.0.2.52 · bcast 192.0.2.55
14 192.0.2.56/30 192.0.2.57 192.0.2.58 net 192.0.2.56 · bcast 192.0.2.59
15 192.0.2.60/30 192.0.2.61 192.0.2.62 net 192.0.2.60 · bcast 192.0.2.63
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