Arostik Logo
ArostikVLARCK

Micro-Technology Solutions

Local Network Diagnostics

My LAN IP & Local Network Data

Discover your private IP address, subnet mask, default gateway, DNS servers, WINS status, and LAN range instantly.

LAN Interface Parameters

Wi-Fi / Ethernet · Clase C (Privada RFC 1918)

LAN IP Address (IPv4)
192.168.1.100

Unique private host IP

Subnet Mask
255.255.255.0

CIDR: /24 · 254 hosts

Default Gateway (Router)
192.168.1.1
Local router IP
DNS Servers
192.168.1.1 (Router / ISP)

Sec: 1.1.1.1 (Cloudflare / Fallback)

Full LAN Network & WINS Breakdown

Network Address192.168.1.0
Broadcast Address192.168.1.255
Usable Host Range192.168.1.1 — 192.168.1.254
Total Subnet Hosts254 devices
Primary WINS ServerNo configurado / Deshabilitado
WINS/NetBIOS Node TypeHíbrido (h-node / NetBIOS over TCP/IP)
LAN Name ResolutionDNS / mDNS (Activo)
NetBIOS over TCP/IPDHCP Default

Native Terminal Commands for Full Dump

Ver todos los datos LAN (IP, Gateway, DNS, WINS)

ipconfig /all

Probar conectividad con el Router (Gateway)

ping 192.168.1.1

Ver tabla de nombres NetBIOS / WINS activos

nbtstat -n

Ver tabla de rutas y puerta de enlace

route print

Local Area Network (LAN) Architecture & Protocols

RFC 1918 private addressing, Ethernet switching, NAT translation, and name services.

Private IP Addressing (RFC 1918)

Local devices operate on non-routable private addresses defined by RFC 1918: 10.0.0.0/8 (16.7M hosts), 172.16.0.0/12 (1M hosts), and 192.168.0.0/16 (65K hosts).

Default Gateway & NAT

The subnet mask determines if destination traffic is local or routed to the Gateway. NAT translates private LAN sockets into public outbound IP packets.

Local DNS vs WINS / NetBIOS

DNS resolves hierarchical domains while WINS maintains backward compatibility for NetBIOS flat names (15 characters) alongside mDNS (Bonjour/Avahi).

DHCP & ARP Protocols

DHCP leases IP parameters upon link establishment, while ARP translates Layer 3 IP destinations into Layer 2 hardware MAC addresses.

LAN & Local Network Troubleshooting

Step-by-step technical fixes for IP conflicts, gateway drops, and DHCP errors.

Issue 1

IP Address Conflict (Duplicate IP on LAN)

⚡ Quick Fix:Toggle Wi-Fi off and on or reconnect Ethernet to request a fresh DHCP lease.
🔧 Technical Fix:Execute `ipconfig /release` followed by `ipconfig /renew`. If using static IP, set an address outside the active DHCP pool.
Issue 2

Default Gateway Unreachable or High Latency (>50ms)

⚡ Quick Fix:Power cycle your router for 20 seconds and move closer to the wireless access point.
🔧 Technical Fix:Clear the ARP cache with `arp -d *` and switch your router channel to an uncongested 5 GHz / 6 GHz frequency.
Issue 3

Self-Assigned 169.254.x.x (APIPA DHCP Failure)

⚡ Quick Fix:Verify your Ethernet cable is plugged into a LAN switch port rather than the WAN/Internet port.
🔧 Technical Fix:Assign a manual static IP (e.g. 192.168.1.150 / 255.255.255.0 / Gateway 192.168.1.1) and restart the Windows DHCP Client service.
Issue 4

DNS Resolution Failure: Webpages Fail but Ping 8.8.8.8 Works

⚡ Quick Fix:Configure your network adapter to use Cloudflare (1.1.1.1) or Google DNS (8.8.8.8) instead of default ISP DNS.
🔧 Technical Fix:Flush corrupted resolver cache with `ipconfig /flushdns` and reset the TCP/IP stack with `netsh int ip reset`.

Did You Know? Networking & Protocol Facts

Historical trivia about 192.168.1.1, APIPA ranges, and the mechanism that saved the Web.

🏠

Why Do Most Routers Default to 192.168.1.1?

In 1996 with RFC 1918, Linksys defaulted their iconic WRT54G routers to 192.168.1.1. As it became the world's best-selling router, the entire consumer networking industry followed suit.

🛡️

NAT: The Hack That Saved the Entire Internet

The 4.29 billion IPv4 address space would have been completely exhausted by 1995. NAT allowed entire buildings and thousands of devices to share a single public IP, keeping the web alive.

👻

The APIPA Ghost Network 169.254.0.0/16

A 169.254.x.x address indicates no DHCP server responded. Windows and macOS self-assign an APIPA address so two directly cabled computers can still communicate.

💾

NetBIOS & The 15-Character Computer Name Limit

Windows computer names are limited to 15 characters because IBM's 1984 NetBIOS protocol reserved the 16th byte to identify service types (<00> Workstation, <20> Server).

Speed TestPublic IPSubnet Calculator