What do the IP classes A, B, C mean?

Class A (1–126) is for large networks, Class B (128–191) for medium and Class C (192–223) for small networks. There are also private ranges (e.g. 192.168.x.x) and reserved addresses.

What is a private IPv4 address?

Private addresses (10.x, 172.16–31.x, 192.168.x) are only valid on the local network and not directly reachable from the internet. Your router translates them to your public IP via NAT.

My IPv4 Address – Details and Network Information

Q: What is an IPv4 address?

An IPv4 address consists of four number blocks (0–255) separated by dots (e.g. 203.0.113.42). It is 32 bits long, allowing about 4.3 billion unique addresses.

216.73.216.31

IPv4 Address

Class C

IP Class

Public

Type

Country

Address Representation

IPv4 (dotted decimal)216.73.216.31

Decimal (32-bit)3628718111

HexadecimalD8.49.D8.1F

Binary11011000.01001001.11011000.00011111

IP ClassClass C

Type Public

Provider & Network

ISP / ProviderAmazon.com, Inc.

OrganisationAmazon.com, Inc.

ASN AS16509

Hostname / PTR–

IP VersionIPv4 (32-bit)

Location

CityColumbus

State / RegionOhio

Country

Vereinigte Staaten

Postal code43215

TimezoneAmerica/New_York

Coordinates39.9587° N · 82.9987° W

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What is an IPv4 address?

IPv4 (Internet Protocol version 4) uses 32-bit addresses written as four numbers separated by dots (e.g. 192.168.1.1). There are approximately 4.3 billion possible IPv4 addresses. Since these are nearly exhausted, IPv6 with 128-bit addresses was introduced. Your IPv4 address is assigned by your ISP and can be static (always the same) or dynamic (changes regularly).

IPv4 Detail View

What is an IPv4 address?