Reference
6 tools in this category. 5 run entirely on your device; 1 make network requests, and each one names the hosts it talks to.
What is in this category
Section titled “What is in this category”| Tool | What it does | Leaves your device |
|---|---|---|
| Reference Hub | Comprehensive networking reference including ports, protocols, and standards | no |
| OUI Lookup | Look up MAC address vendor information using IEEE OUI database | yes: api.maclookup.app |
| Port Reference | Quick reference for common network ports and services | no |
| CIDR Reference | Complete CIDR notation cheat sheet with subnet masks and host counts | no |
| Protocol Reference | IP protocol numbers and ICMP types reference | no |
| IPv6 Reference | IPv6 address types, prefixes, and format reference | no |
1 of 6 rows leave your device, so those are the only ones that stop working offline. The hosts in that column come from the tool registry, not from this page, so they cannot drift from what the code actually requests.
Tool by tool
Section titled “Tool by tool”Reference Hub
Section titled “Reference Hub”Comprehensive networking reference including ports, protocols, and standards. Open it at /tools/reference-hub/.
- Port numbers
- Protocols
- Quick reference
Runs entirely on your device; no request is made.
OUI Lookup
Section titled “OUI Lookup”Look up MAC address vendor information using IEEE OUI database. Open it at /tools/oui-lookup/.
- IEEE OUI database
- Vendor identification
- MAC analysis
Sends requests to api.maclookup.app.
Port Reference
Section titled “Port Reference”Quick reference for common network ports and services. Open it at /tools/port-reference/.
- Common ports
- Service lookup
- Categorized
Runs entirely on your device; no request is made.
CIDR Reference
Section titled “CIDR Reference”Complete CIDR notation cheat sheet with subnet masks and host counts. Open it at /tools/cidr-reference/.
- All CIDRs
- Private ranges
- Mask table
Runs entirely on your device; no request is made.
Protocol Reference
Section titled “Protocol Reference”IP protocol numbers and ICMP types reference. Open it at /tools/protocol-reference/.
- IP protocols
- ICMP types
- Error codes
Runs entirely on your device; no request is made.
IPv6 Reference
Section titled “IPv6 Reference”IPv6 address types, prefixes, and format reference. Open it at /tools/ipv6-reference/.
- Address types
- Special addresses
- Format rules
Runs entirely on your device; no request is made.
How this page is produced
Section titled “How this page is produced”Everything above is generated at docs build time from lib/tool-registry.ts. Editing this page by hand does nothing, because the next build overwrites it. Fix the registry instead.