Network desk

Visually show network and host bits for learning. The result stays on this page.

Random subnetting questions with worked answers. The result stays on this page.

Detect carrier-grade NAT (100.64.0.0/10) addresses. The result stays on this page.

Split a range into N pools for DHCP failover/split scopes. The result stays on this page.

Random IPs within a subnet for testing. The result stays on this page.

Convert IPv4 multicast address to 01:00:5e MAC. The result stays on this page.

IPv6 Address Validator. Validate IPv6 syntax in bulk. The result stays on this page.

IPv6 to Binary Converter. Show IPv6 address in binary. The result stays on this page.

Convert IPv4 to ::ffff: mapped format and back. The result stays on this page.

Compute ff02::1:ff solicited-node address. The result stays on this page.

IPv6 Multicast to MAC Converter. Convert IPv6 multicast to 33:33 MAC. The result stays on this page.

Number of addresses/subnets in a prefix. The result stays on this page.

Predict SLAAC addresses from prefix and MAC. The result stays on this page.

AAAA Record Lookup. Look up IPv6 AAAA records. The result stays on this page.

NS Record Lookup. Look up authoritative name servers. The result stays on this page.

Look up canonical name records and chains. The result stays on this page.

Look up SOA serial, refresh and TTL values. The result stays on this page.

Look up service records (SIP, LDAP, Kerberos, XMPP). The result stays on this page.

Show iterative resolution from root to authoritative. The result stays on this page.

Compare response times of public resolvers. The result stays on this page.

Check zone file syntax and common errors. The result stays on this page.

DNS Zone File Generator. Build a zone file from a form. The result stays on this page.

Generate named.conf zones, ACLs and options. The result stays on this page.

Unbound Config Generator. Generate Unbound resolver config. The result stays on this page.