Kalkulatur tas-Subnet (IPv4 CIDR)

Tqassim sħiħ tas-subnet IPv4: netwerk, xandir, maskra, wildcard, firxa ospitanti u għadd.

Indirizz tan-netwerk —

Indirizz tax-xandir —

Subnet mask —

Maskra tal-wildcard —

Ospitanti li jistgħu jintużaw —

Firxa tal-ospitanti —

Riżultati aġġornament kif inti tip.

Dan il-kalkulatur talek it-tweġiba t-tajba?

Dwar din il-kalkulatur

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.

Mistoqsijiet li jsiru ta' spiss

Kemm hosts huma f’subnet?

Subnet /n għandu 2^(32−n) indirizzi, minbarra tnejn riservati għan-netwerk u l-broadcast.A /24 għandu 256 indirizzi u 254 hosts li jistgħu jintużaw.

X'inhu maskra wildcard?

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.

X'inhi d-differenza bejn in-netwerk u l-indirizz tax-xandir?

L-indirizz tan-netwerk (il-bits tal-host kollha 0) jagħti isem lis-subnet; l-indirizz tal-broadcast (il-bits tal-host kollha 1) jilħaq kull host fuqu, u l-ebda wieħed ma jista' jiġi assenjat lil apparat.

X’ifisser il-prefiss CIDR (/24, /16)?

Huwa n-numru ta' bits li jiffurmaw il-parti tan-netwerk tal-indirizz. Prefiss akbar ifisser aktar bits tan-netwerk u inqas bits tal-host, għalhekk subnet iżgħar: /24 jagħti 254 hosts, /25 jagħti 126, u kull bit żejjed inaqqas bin-nofs il-blokk.

Kif taqsam netwerk f’subnets iżgħar?

Is-self bit host billi żżid il-prefix. Qsim /24 f'żewġ /25s jagħti żewġ blokki ta ’126 hosts; tmur għal /26 jagħti erba blokki ta ’62. Kull bit prefix miżjud jirdoppja n-numru ta ’subnets u jonqos bin-nofs id-daqs tagħhom.

X'inhi klassi indirizz IP?

L-iskema klassi qadima maqsuma indirizzi mill-ewwel octet tagħhom: Klassi A (1-126), Klassi B (128-191) u Klassi C (192-223) għall unicast, flimkien D għall multicast u E riservati.CIDR sostitwiti klassijiet għall-allokazzjoni, iżda l-kalkulatur xorta jirrapporta l-klassi l-indirizz jaqa fil.

X'inhuma /31 u /32 subnets użati għall?

A/31 għandu biss żewġ indirizzi u l-ebda xandir, użati għall-punt għal punt links bejn routers. A/32 huwa indirizz host wieħed, komuni għall loopbacks u rotot ospitanti. Il-kalkulatur jimmaniġġja ż-żewġ każijiet speċjali.

API — uża din il-kalkulatur mill-kodiċi

Sejjaħ dan il-kalkulatur bħala punt aħħari JSON b'xejn — l-ebda ċavetta meħtieġa Ibgħat il-valuri tal-qasam hawn taħt bħala parametri tal-mistoqsija jew JSON. Kull ħaġa li tħalli barra tuża l-istess default li din il-paġna hija mimlija minn qabel; parametru mhux magħruf huwa 400, qatt żero sieket. Aqra d-dokumenti sħaħ tal-API →

Punt aħħari

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);

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Dwar din il-kalkulatur

Mistoqsijiet li jsiru ta' spiss

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curl

JavaScript fetch()

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