Browser-native telecom toolkit

telco@aio:~ TelcoAIO Network Engineering Toolbox

Minimal, high-signal utilities for subnet planning, DNS checks, route visibility, and maintenance workflows.

Detecting public IP...

Address Tools

Wildcard Mask Calculator

Translate subnet masks, wildcard masks, and prefix lengths in both directions, then check the actual ACL address range.

The ACL range section expects an IPv4 address plus wildcard mask.

Wildcard Calculator

Compute wildcard masks for ACLs and route policies.

Category
addressing
Tags
wildcard, acl

Inputs

  • An IPv4 prefix or address with mask

Outputs

  • Wildcard mask matching the requested range
  • Resulting match range
  • Equivalent CIDR for sanity-checking

Use Cases

  • Writing ACLs on Cisco IOS / IOS-XR
  • Building Cisco / Junos route-map match clauses
  • Cross-checking a hand-written wildcard before committing

Limitations

  • IPv4 only
  • Some platforms accept non-contiguous wildcards; this tool focuses on the common contiguous case