Калкулятор подсети (IPv4 CIDR)
IPv4 ngawengku subnet lengkap: jaringan, broadcast, masker, wildcard, host range lan count.
Hasilne bakal dioptimalake nalika sampeyan ngetik.
Ngenai kalkulator iki
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.
Takon-takon kang kerep diajukake
Apa ana host ing subnet?
A /n subnet boga 2^(32−n) alamat, minus dua disimpen pikeun jaringan jeung broadcast. A /24 boga 256 alamat jeung 254 hosts bisa dipaké.
Apa iku masker wildcard?
Topeng wildcard nyaéta bit-ka-bit balik tina topeng subnet (255.0 → 0.255). Daftar kontrol aksés sareng OSPF nganggo éta pikeun nyambungkeun jajaran alamat.
Apa bedane antarane alamat jaringan lan alamat broadcast?
Alamat jaringan (kabéh bit host 0) ngaran subnet; alamat broadcast (kabéh bit host 1) ngahontal unggal host dina éta. Kadua-duana teu bisa ditangtukeun ka peranti.
Apa tegese prefiks CIDR (/24, /16)?
Ieu jumlah bit pangluhurna anu ngabentuk bagian jaringan alamat. Prefix anu langkung ageung hartosna langkung seueur bit jaringan sareng kirang bit host, janten subnet anu langkung alit: /24 masihan 254 host, /25 masihan 126, sareng unggal bit tambahan nyababkeun blok jadi satengah.
Bagaimana saya membagi jaringan menjadi subnet yang lebih kecil?
Pinjaman host bit ku ngaronjatkeun prefix. Pisahkan /24 kana dua /25s nyadiakeun dua blok tina 126 host; asup ka /26 nyadiakeun opat blok tina 62. Satiap bit prefix ditambahkeun ngaduplikasi jumlah subnets sarta ngaleuwihan ukuranna.
Apa iku IP Address Class?
Klasifikasi ieu diwangun ku 3 kelas: Klasa A (1-126), Klasa B (128-191) lan Klasa C (192-223) kanggo unicast, plus D pikeun multicast lan E reserved. CIDR diganti kelas kanggo alokasi, nanging kalkulator masih ngalaporkeun kelas alamat anu jatuh.
Apa sing digunakake subnet /31 lan /32?
A /31 ngan boga dua alamat sarta teu aya broadcast, digunakeun pikeun sambungan titik-ka-titik antara router. A /32 mangrupa alamat host tunggal, umum pikeun loopbacks sarta rute host. Kalkulator ngarawat kadua kasus husus.
API — gunakake kalkulator iki saka kode
Ngadongékeun kalkulator ieu minangka titik akhir JSON bébas — teu peryogi kunci. Kirim nilai medan di handapeun minangka parameter pitakonan atawa JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Waca dokumen lengkap API →
Tampilan
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);Hasilna nyaéta perkiraan pikeun pituduh umum, henteu saran finansial, médis atanapi pajak.