192.168.1.1Private (RFC 1918)192.168.0.0/16The home router range
NETWORK & IP · LOCAL WORKBENCH
IP Range Checker
Classify an IP address and inspect its private, special-use, and public-range status.NETWORK & IP · LOCAL WORKBENCH · BROWSER WORKSPACE
Set the inputs. Review the transformation.
Classify an IP address and inspect its private, special-use, and public-range status.
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01 · ADDRESS LISTIPv4 · ONE PER LINE
Checked in this browserAddresses are not sent to a server. Public means “outside the listed special-use ranges,” not that a host is reachable.
02 · ADDRESS-BY-ADDRESS6 ADDRESSES
100.64.12.9Carrier-grade NAT100.64.0.0/10Your ISP’s shared space — neither private nor public
169.254.7.201Link-local169.254.0.0/16Self-assigned because DHCP did not answer
8.8.8.8PublicRoutable on the internet; confirm current registry allocation before relying on it.
127.5.5.5Loopback127.0.0.0/8The whole /8, not just 127.0.0.1
172.20.5.6Private (RFC 1918)172.16.0.0/12Runs to 172.31, not 172.16 only
WHAT THIS MEANS2 NOTES
A 100.64.0.0/10 WAN address means your ISP is translating traffic too. Port forwarding on your router cannot create an inbound path through the ISP’s NAT; ask about a public address or use a relay/VPN endpoint.
A 169.254 address usually means DHCP did not answer. The device has no gateway; check the link, switch port, or DHCP pool.
03 · SPECIAL-USE REFERENCE15 RANGES
0.0.0.0/8This networkSource-only, and never a valid destination10.0.0.0/8Private (RFC 1918)16.7 million addresses — used by anything large100.64.0.0/10Carrier-grade NATYour ISP’s shared space — neither private nor public127.0.0.0/8LoopbackThe whole /8, not just 127.0.0.1169.254.0.0/16Link-localSelf-assigned because DHCP did not answer172.16.0.0/12Private (RFC 1918)Runs to 172.31, not 172.16 only192.0.0.0/24IETF protocol useSpecial-purpose assignments192.0.2.0/24DocumentationTEST-NET-1, for examples — never real192.168.0.0/16Private (RFC 1918)The home router range198.18.0.0/15Benchmark testingNetwork device benchmarking198.51.100.0/24DocumentationTEST-NET-2203.0.113.0/24DocumentationTEST-NET-3224.0.0.0/4MulticastA group, never a host240.0.0.0/4ReservedReserved since 1981 and still is255.255.255.255/32BroadcastLimited broadcast, this segment only◎
Runs in this browser. Results are estimates or editing cues. Review the assumptions and source-specific limits before using them in a consequential decision.
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How this app works
Classify an IP address and inspect its private, special-use, and public-range status. Results update as you adjust inputs and stay in this browser.