About NetoStack

NetoStack is a collection of free, open-source networking utilities designed to simplify common network-related tasks for system administrators and network engineers.

IPv4 Subnet Calculator

IPv6 Subnet Calculator

VLSM Calculator

Supernet Calculator

Subnet Planner

IPv4 Subnet Calculator

IPv6 Subnet Calculator

VLSM Calculator

Supernet Calculator

Subnet Planner

CIDR → Mask

Mask → CIDR

CIDR Summarizer

CIDR Split

Next Available Subnet

Free Space Finder

CIDR Deaggregate

CIDR Compare

CIDR Allocator

CIDR Alignment

Wildcard Mask Converter

Difference (A - B)

Overlap (A ∩ B)

Contains (A ⊆ B)

CIDR → Mask

Mask → CIDR

CIDR Summarizer

CIDR Split

Next Available Subnet

Free Space Finder

CIDR Deaggregate

CIDR Compare

CIDR Allocator

CIDR Alignment

Wildcard Mask Converter

Difference (A - B)

Overlap (A ∩ B)

Contains (A ⊆ B)

Format Representations

IP Distance Calculator

Nth IP Calculator

Random IP Generator

IP Regex Generator

IP Address Validator

IP Enumerate

IPv6 Expand

IPv6 Compress

IPv6 Normalizer

IPv6 Zone ID Handler

IPv6 Solicited-Node

IPv6 Teredo Parser

IPv6 NAT64 Translator

IPv4 → IPv6

IPv6 → IPv4

EUI-64 Converter

ULA Generator

Format Representations

IP Distance Calculator

Nth IP Calculator

Random IP Generator

IP Regex Generator

IP Address Validator

IP Enumerate

IPv6 Expand

IPv6 Compress

IPv6 Normalizer

IPv6 Zone ID Handler

IPv6 Solicited-Node

IPv6 Teredo Parser

IPv6 NAT64 Translator

IPv4 → IPv6

IPv6 → IPv4

EUI-64 Converter

ULA Generator

PTR Generator

PTR Generator

Reverse Zone Generator

Reverse Zones Calculator

PTR Sweep Planner

A/AAAA Bulk Generator

CNAME Builder

MX Record Planner

SRV Record Builder

TXT Record Escape Tool

SPF Policy Builder

DKIM Key Generator

DMARC Policy Builder

CAA Record Builder

TLSA Generator

SSHFP Generator

SVCB/HTTPS Builder

NAPTR Builder

LOC Builder

RP Builder

IDN Punycode Converter

DNS Record Validator

TTL Calculator

EDNS Size Estimator

DNS Label Normalizer

Zone Linter

Zone Diff

Zone Statistics

Name Length Checker

DNSKEY Key Tag Calculator

DS Record Generator

NSEC3 Hash Calculator

CDS/CDNSKEY Builder

RRSIG Planner

PTR Generator

PTR Generator

Reverse Zone Generator

Reverse Zones Calculator

PTR Sweep Planner

A/AAAA Bulk Generator

CNAME Builder

MX Record Planner

SRV Record Builder

TXT Record Escape Tool

SPF Policy Builder

DKIM Key Generator

DMARC Policy Builder

CAA Record Builder

TLSA Generator

SSHFP Generator

SVCB/HTTPS Builder

NAPTR Builder

LOC Builder

RP Builder

IDN Punycode Converter

DNS Record Validator

TTL Calculator

EDNS Size Estimator

DNS Label Normalizer

Zone Linter

Zone Diff

Zone Statistics

Name Length Checker

DNSKEY Key Tag Calculator

DS Record Generator

NSEC3 Hash Calculator

CDS/CDNSKEY Builder

RRSIG Planner

DNS Lookup

Reverse DNS Lookup

DNS Propagation Checker

SPF Record Evaluator

DMARC Policy Checker

CAA Effective Policy

NS/SOA Consistency Check

DNSSEC AD Flag Checker

SOA Serial Analyzer

HTTP Headers Analyzer

Redirect Trace

Security Headers Analyzer

CORS Policy Checker

HTTP Performance Analyzer

TLS Certificate Analyzer

TLS Versions Probe

TLS ALPN Negotiation

TCP Port Checker

HTTP Ping

MX Health Checker

SPF Policy Checker

DMARC Policy Checker

Domain RDAP Lookup

IP Address RDAP Lookup

ASN RDAP Lookup

DNS Lookup

Reverse DNS Lookup

DNS Propagation Checker

SPF Record Evaluator

DMARC Policy Checker

CAA Effective Policy

NS/SOA Consistency Check

DNSSEC AD Flag Checker

SOA Serial Analyzer

HTTP Headers Analyzer

Redirect Trace

Security Headers Analyzer

CORS Policy Checker

HTTP Performance Analyzer

TLS Certificate Analyzer

TLS Versions Probe

TLS ALPN Negotiation

TCP Port Checker

HTTP Ping

MX Health Checker

SPF Policy Checker

DMARC Policy Checker

Domain RDAP Lookup

IP Address RDAP Lookup

ASN RDAP Lookup

CIDR Notation Explained

VLSM in Plain English

Route Summarization / Supernetting

IPv6 Address Types & Key Prefixes

Common IPv6 Prefix Lengths

IPv4 in IPv6

IPv6 Privacy Addresses

Common Subnet Sizes

Network Classes (A/B/C)

Reserved IP Ranges

Special-Use IPv4 Blocks (RFC 6890)

Private vs Public IP Addresses

Carrier-Grade NAT Explained

Link-Local & APIPA Addresses

IPv4 & IPv6 Multicast Basics

Reverse DNS (PTR Records)

Reverse Zones for CIDR Delegation

ICMP & ICMPv6: Common Types

ARP vs NDP

What is an ASN?

Common TCP/UDP Ports

ACL Wildcard Masks

Common MTU/MSS Values

CIDR Notation Explained

VLSM in Plain English

Route Summarization / Supernetting

IPv6 Address Types & Key Prefixes

Common IPv6 Prefix Lengths

IPv4 in IPv6

IPv6 Privacy Addresses

Common Subnet Sizes

Network Classes (A/B/C)

Reserved IP Ranges

Special-Use IPv4 Blocks (RFC 6890)

Private vs Public IP Addresses

Carrier-Grade NAT Explained

Link-Local & APIPA Addresses

IPv4 & IPv6 Multicast Basics

Reverse DNS (PTR Records)

Reverse Zones for CIDR Delegation

ICMP & ICMPv6: Common Types

ARP vs NDP

What is an ASN?

Common TCP/UDP Ports

ACL Wildcard Masks

Common MTU/MSS Values