Overview
Calculates IPv4/IPv6 subnet details from CIDR notation — network/broadcast, netmask, wildcard (Cisco ACL) mask, binary/hex masks, usable host range, RFC classification (private/loopback/multicast), supernet, and subnet-split counts. Pass comma-separated CIDRs to detect overlaps and classify each pair (subnet/supernet/partial overlap/disjoint); multi-CIDR responses return {subnets, overlaps}.
Health
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Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-09-20 22:53:42 | healthy | 402 | 172ms | |
| 2026-09-20 13:35:47 | healthy | 402 | 409ms | |
| 2026-09-20 04:43:36 | healthy | 402 | 207ms | |
| 2026-09-19 14:26:08 | healthy | 402 | 257ms | |
| 2026-09-19 11:36:44 | healthy | 402 | 181ms | |
| 2026-09-19 00:35:27 | healthy | 402 | 188ms | |
| 2026-09-18 13:22:39 | healthy | 402 | 173ms | |
| 2026-09-18 08:41:30 | healthy | 402 | 195ms |