Browse Prior Art Database

Variable Length Subnet Table For IPv4 (RFC1860)

IP.com Disclosure Number: IPCOM000004116D
Original Publication Date: 1995-Oct-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 3 page(s) / 5K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

T. Pummill: AUTHOR [+2]

Abstract

This document itemizes the potential values for IPv4 subnets. Additional information is provided for Hex and Decmial values, classfull equivalents, and number of addresses available within the indicated block. We appreciate inputs from Bruce Pinsky (cisco) and Daniel Karrenberg (RIPE).

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 51% of the total text.

Network Working Group T. Pummill

Request for Comments: 1860 Alantec

Category: Informational B. Manning

ISI

October 1995

Variable Length Subnet Table For IPv4

Status of this Memo

This memo provides information for the Internet community. This memo

does not specify an Internet standard of any kind. Distribution of

this memo is unlimited.

Abstract

This document itemizes the potential values for IPv4 subnets.

Additional information is provided for Hex and Decmial values,

classfull equivalents, and number of addresses available within the

indicated block. We appreciate inputs from Bruce Pinsky (cisco) and

Daniel Karrenberg (RIPE).

Table

The following table lists the variable length subnets from 1 to 32,

the CIDR representation form and the Decmial equivalents.

Mask value:

Hex CIDR Decimal #of add Classfull

80.00.00.00 /1 128.0.0.0 2048 M 128 A

C0.00.00.00 /2 192.0.0.0 1024 M 64 A

E0.00.00.00 /3 224.0.0.0 512 M 32 A

F0.00.00.00 /4 240.0.0.0 256 M 16 A

F8.00.00.00 /5 248.0.0.0 128 M 8 A

FC.00.00.00 /6 252.0.0.0 64 M 4 A

FE.00.00.00 /7 254.0.0.0 32 M 2 A

FF.00.00.00 /8 255.0.0.0 16 M 1 A

FF.80.00.00 /9 255.128.0.0 8 M 128 B

FF.C0.00.00 /10 255.192.0.0 4 M 64 B

FF.E0.00.00 /11 255.224.0.0 2 M 32 B

FF.F0.00.00 /12 255.240.0.0 1024 K 16 B

FF.F8.00.00 /13 255.248.0.0 512 K 8 B

FF.FC.00.00 /14 255.252.0.0 256 K 4 B

FF.FE.00.00 /15 255.254.0.0 128 K 2 B

FF.FF.00.00 /16 255.255.0.0 64 K 1 B

FF.FF.80.00 /17 255.255.128.0 32 K 128 C

FF.FF.C0.00 /18 255.255.192.0 16 K 64 C

FF.FF.E0.00 /19 255.255.224.0 8 K 32 C

FF.FF.F0.00 /20 255.255.240.0 4 K 16 C

FF.FF.F8.00 /21 255.255.248.0 2 K 8 C

FF.FF.FC.00 /22 255.255.252.0 1 K 4 C

FF.FF.FE.00 /23 255.255.254.0 512 2 C

FF.FF.FF.00 /24 255.255.255.0 256 1 C

FF.FF.FF.80 /25 255.255.255.128 128

FF.FF.FF.C0 /26 255.255.255.192 64

...