Subnet Calculator (IPv4 CIDR)
Full IPv4 subnet kupararira: network, kutumira, mask, wildcard, mumiri anopfuura uye kufungidzira.
Zvinyorwa zvinogadziridzwa paunenge uchinyora.
Nezve iyi kalkulator
This subnet calculator turns an IPv4 address and a CIDR prefix into the full structure of a subnet. An IPv4 address is 32 bits, usually written as four dot-separated octets like 192.168.1.10, and a CIDR prefix such as /24 splits those 32 bits into a network part (the leading bits, fixed for every host in the subnet) and a host part (the remaining bits, unique to each device). This calculator takes an address and a prefix length and derives the network address, broadcast address, subnet mask, wildcard mask and the range of usable host addresses, along with the IP class and total address count.
The size of a subnet is set by the prefix: a /n block holds 2^(32−n) addresses, of which two are reserved — the network address (all host bits 0, naming the subnet) and the broadcast address (all host bits 1, reaching every host). So a /24 has 2^8 = 256 addresses and 254 usable hosts, a /25 has 128 addresses and 126 usable hosts, and each extra prefix bit halves the block. As a worked example, 192.168.1.10/24 gives a network of 192.168.1.0, a broadcast of 192.168.1.255, a 255.255.255.0 mask, a 0.0.0.255 wildcard mask, and a usable host range of 192.168.1.1 to 192.168.1.254.
Subnetting is how networks are carved into manageable, secure segments — separating departments, sizing VLANs, planning address allocation and writing firewall and routing rules. The wildcard mask (the bitwise inverse of the subnet mask) is what Cisco access-control lists and OSPF use to match ranges of addresses. The /31 and /32 prefixes are special cases: /31 is used for point-to-point links with two usable addresses and no broadcast, and /32 describes a single host.
Zvimwe zvinobvunzwa zvakanyanya
Mahosts mangani ari mu subnet?
A /n subnet ine 2^ (32-n) mazita, minus maviri akachengetwa kune network uye kutumira. A /24 ine 256 mazita uye 254 kushandiswa mahosts.
Chii chinonzi wildcard mask?
A wildcard mask is the bitwise inverse of the subnet mask (255.255.255.0 → 0.0.0.255). Access-control lists and OSPF use it to match ranges of addresses.
Chii chinonzi chiyero pakati pe network uye broadcast address?
Nhare mbozha kero (sezviri pachena, zvese zvichave nebit 0) inotiudza zita re subnet; Broadcast kero (sezviri pachena, zvese zvichave nebit 1) inotiudza zita rese re host. Hapana chinopihwa chigadzirwa.
Chii chinonzi CIDR prefix (/24, /16)?
Iyo ndiyo nhamba yezvimwe zviviri zvinotungamira zvinoumba network chikamu cheaddress. A zhinji prefix zvinoreva network zviviri zvakawanda uye zvishoma host bits, saka a zhinji subnet: /24 inopa 254 mahosts, /25 inopa 126, uye chero zviviri zviviri zvinowedzera block.
Ndinogona sei kuparadzira network kuita masubnets akaderera?
Kutenga mabit ehosts nekuwedzera prefix. Kuparadza /24 kuita maviri /25s kunopa maviri mablocks e126 hosts; kuenda ku /26 kunopa maviri mablocks e62. Kana uchiwedzera prefix bit, unowedzerawo subnets uye unowedzera kureba kwavo.
Chii chinonzi IP address class?
Chirongwa chekare cheClassful chakaparadza maaddresses nekutanga octet: Class A (1-126), Class B (128-191) neClass C (192-223) yeunicast, plus D yemulticast uye E rakachengetwa. CIDR yakashandura maclasses ekugamuchirwa, asi calculator ichiri kuzivisa maclass iyo address inobva.
Chii chinonzi /31 ne /32 subnets?
A / 31 ane chete maviri mazita uye hapana kuparidza, anoshandiswa kune point-to-point mazano pakati routers. A / 32 ndeimwe hofisi kero, zvakasiyana-siyana zve loopbacks uye hofisi nzira. The calculator anobatawo zvakasiyana-siyana nyaya.
API — kushandisa iyi kalkulator kubva code
Nhare iyi calculator semahara JSON endpoint - hapana chikuru zvinodiwa. Kutumira nzvimbo mavara pasi separameter query kana JSON. Chii zvachose chaunoisa kunze chinoshandisa default iyo peji iri rakasviba nayo; parameter isiri yechokwadi inonzi 400, uye haisi zero. Tora yakazara API docs →
Endpoint
GET https://calculator.free/api/v1/subnet/curl
curl "https://calculator.free/api/v1/subnet/?ip=192.168.1.10&cidr=24"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/subnet/?" + new URLSearchParams({
"ip": "192.168.1.10",
"cidr": "24"
}));
const data = await r.json();
console.log(data.results);Zviratidzo zvemubvunzo ndezvekufungidzira kwechinangwa chekudzidzisa chete, kwete zvemari, zvehutano kana zvemari.