Subnet Mask Cheat Sheet

26 October 2025 at 10:37

Official Post

	Addresses	Host	Netmask	Amount of a Class C
/30	4	2	255.255.255.252	1/64
/38	8	6	255.255.255.248	1/32
/28	16	14	255.255.255.240	1/16
/27	32	30	255.255.255.224	1/8
/26	64	62	255.255.255.192	1/4
/25	128	126	255.255.255.128	1/2
/24	256	254	255.255.255.0	1
/23	512	510	255.255.254.0	2
/22	1024	1022	255.255.252.0	4
/21	2048	2046	255.255.248.0	8
/20	4096	4094	255.255.240.0	16
/19	8192	8190	255.255.224.0	32
/18	16384	16382	255.255.192.0	64
/18	32768	32766	255.255.128.0	128
/16	65536	65534	255.255.0.0	256

Guide to sub-class C blocks

Network #	IP Range	Broadcast
.0	.1 - .126	.127
.128	.129 - .254	.255

/25 -- 2 Subnets -- 126 Hosts/Subnet

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Did you know…?

“Be persistent and never give up hope.”

George Lucas

“We must let go of the life we have planned, so as to accept the one that is waiting for us.”

Joseph Campbell

“You can’t help what you feel, but you can help how you behave.”

Margaret Atwood

“Yesterday is but today’s memory and tomorrow is today’s dream.”

Khalil Gibran

“The future is not something we enter. The future is something we create.”

Leonard I. Sweet

“Do one thing every day that scares you.”

Eleanor Roosevelt

“Some people want it to happen, some wish it would happen, others make it happen.”

Michael Jordan

“Dreaming, after all, is a form of planning.”

Gloria Steinem

“It is during our darkest moments that we must focus to see the light.”

Aristotle

“Life is what happens to you when you are busy making other plans.”

John Lennon

“Live in the sunshine, swim the sea, drink the wild air.”

Ralph Waldo Emerson

“Life is made of ever so many partings welded together.”

Charles Dickens

“We have to dare to be ourselves, however frightening or strange that self may prove to be.”

May Sarton

“If you live long enough, you’ll make mistakes. But if you learn from them, you’ll be a better person.”

Bill Clinton

“You have to believe in yourself when no one else does.”

Serena Williams

“Success is stumbling from failure to failure with no loss of enthusiasm.”

Winston Churchill

“You can be everything. You can be the infinite amount of things that people are.”

Kesha

“When I let go of what I am, I become what I might be.”

Lao Tzu

You cannot change what you refuse to confront.

“Whatever we are, whatever we make of ourselves, is all we will ever have—and that, in its profound simplicity, is the meaning of life.”

Philip Appleman

“To succeed in life, you need three things: a wishbone, a backbone, and a funnybone.”

Reba McEntire

“If you don’t like the road you’re walking, start paving another one.”

Dolly Parton

“If you have knowledge, let others light their candles in it.”

Margaret Fuller

“Life isn’t about finding yourself. Life is about creating yourself.”

George Bernard Shaw

“One of the deep secrets of life is that all that is really worth doing is what we do for others.”

Lewis Carroll

“Be where you are; otherwise you will miss your life.”

Buddha

“Be sure you put your feet in the right place, then stand firm.”

Abraham Lincoln

“Life has no limitations, except the ones you make.”

Les Brown

“Life is very interesting…in the end, some of your greatest pains become your greatest strengths.”

Drew Barrymore

“You only live once, but if you do it right, once is enough.”

Mae West

“The only thing we have to fear is fear itself.”

Franklin D. Roosevelt

“Spread love everywhere you go. Let no one ever come without leaving happier.”

Mother Teresa

“It does not matter how slowly you go, as long as you do not stop.”

Confucius

“Life is a daring adventure or it is nothing at all.”

Helen Keller

“No need to hurry. No need to sparkle. No need to be anybody but oneself.”

Virginia Woolf

“Dreams do not come true just because you dream them. It’s hard work that makes things happen. It’s hard work that creates change.”

Shonda Rhimes

“The purpose of life is to live it, to taste experience to the utmost, to reach out eagerly and without fear for newer and richer experience.”

Eleanor Roosevelt

“There’s love enough in this world for everybody, if people will just look.”

Kurt Vonnegut

“For the great doesn’t happen through impulse alone, and is a succession of little things that are brought together.”

Vincent Van Gogh

“My wish for you is that you continue. Continue to be who you are, to astonish a mean world with your acts of kindness.”

Maya Angelou

“I’m not going to continue knocking that old door that doesn’t open for me. I’m going to create my own door and walk through that.”

Ava DuVernay

“Tomorrow is a new day. You shall begin it serenely and with too high a spirit to be encumbered with your old nonsense.”

Ralph Waldo Emerson

“Failure is a great teacher and, if you are open to it, every mistake has a lesson to offer.”

Oprah Winfrey

“Once you face your fear, nothing is ever as hard as you think.”

Olivia Newton-John

“Coming together is a beginning; keeping together is progress; working together is success.”

Henry Ford

“Living might mean taking chances, but they’re worth taking.”

Lee Ann Womack

“It is better to fail in originality than to succeed in imitation.”

Herman Melville

“Get busy living or get busy dying.”

Stephen King

“Always go with your passions. Never ask yourself if it’s realistic or not.”

Deepak Chopra

“Never let the fear of striking out keep you from playing the game.”

Babe Ruth

“You don’t always need a plan. Sometimes you just need to breathe, trust, let go and see what happens.”

Mandy Hale

“Always do your best. What you plant now, you will harvest later.”

Og Mandino

“I believe that if you’ll just stand up and go, life will open up for you. Something just motivates you to keep moving.”

Tina Turner

“When you have a dream, you’ve got to grab it and never let go.”

Carol Burnett

“Let us make our future now, and let us make our dreams tomorrow’s reality.”

Malala Yousafzai

“Find out who you are and do it on purpose.”

Dolly Parton

“Life does not have to be perfect to be wonderful.”

Annette Funicello

“We are here to add what we can to life, not to get what we can from life.”

William Osler

“Don’t take yourself too seriously. Know when to laugh at yourself, and find a way to laugh at obstacles that inevitably present themselves.”

Halle Bailey

“We pass through this world but once.”

Stephen Jay Gould

“I may not have gone where I intended to go, but I think I have ended up where I needed to be.”

Douglas Adams

“Ambition is the path to success. Persistence is the vehicle you arrive in.”

Bill Bradley

“The world you desire can be won. It exists... it is real... it is possible... it’s yours.”

Ayn Rand

“There is no passion to be found playing small—in settling for a life that is less than the one you are capable of living.”

Nelson Mandela

“Don’t worry about failure, you only have to be right once.”

Drew Houston

“You will face many defeats in life, but never let yourself be defeated.”

Maya Angelou

“Life is like riding a bicycle. To keep your balance, you must keep moving.”

Albert Einstein

“The future belongs to those who prepare for it today.”

Malcolm X

“Just when you think it can’t get any worse, it can. And just when you think it can’t get any better, it can.”

Nicholas Sparks

“It is better to be hated for what you are than to be loved for what you are not.”

Andre Gide

“If you don’t have any shadows, you’re not in the light.”

Lady Gaga

“And when you want something, all the universe conspires in helping you achieve it.”

Paulo Coelho

“There are no regrets in life. Just lessons.”

Jennifer Aniston

“Keep smiling, because life is a beautiful thing and there’s so much to smile about.”

Marilyn Monroe

“It is never too late to be what you might have been.”

George Elliot

“There is no perfection, only life.”

Milan Kundera

“The new dawn blooms as we free it. For there is always light if only we’re brave enough to see it, if only we’re brave enough to be it.”

Amanda Gorman

“Next time, ask ‘What’s the worst that will happen?’ Then push yourself a little further than you dare.”

Audre Lorde

“For me, becoming isn’t about arriving somewhere or achieving a certain aim. I see it instead as forward motion, a means of evolving, a way to reach continuously toward a better self. The journey doesn’t end.”

Michelle Obama

“There are so many great things in life; why dwell on negativity?”

Zendaya

“Before anything else, preparation is the key to success.”

Alexander Graham Bell

“The future belongs to those who believe in the beauty of their dreams.”

Eleanor Roosevelt

“All dreams are within reach. All you have to do is keep moving towards them.”

Viola Davis

“The art of life is to know how to enjoy a little and to endure very much.”

William Hazlitt

“The biggest adventure you can take is to live the life of your dreams.”

Oprah Winfrey

“Keep your face towards the sunshine and shadows will fall behind you.”

Walt Whitman

“We make a living by what we get, but we make a life by what we give.”

Winston Churchill

“Dream big and dare to fail.”

Norman Vaughan

“The great courageous act that we must all do is to have the courage to step out of our history and past so that we can live our dreams.”

Oprah Winfrey

“The fear of death follows from the fear of life. A man who lives fully is prepared to die at any time.”

Mark Twain

“I’m not going to continue knocking on that old door that doesn’t open for me. I’m going to create my own door and walk through that.”

W.P. Kinsella

“The simple things are also the most extraordinary things, and only the wise can see them.”

Paulo Coelho

“Don’t judge each day by the harvest you reap but by the seeds that you plant.”

Robert Louis Stevenson

“Nothing is impossible. The word itself says ‘I’m possible!’”

Audrey Hepburn

“In three words I can sum up everything I’ve learned about life: It goes on.”

Robert Frost

“Be yourself; everyone else is already taken.”

Oscar Wilde

“It’s amazing how a little tomorrow can make up for a whole lot of yesterday.”

John Guare

“Good friends, good books, and a sleepy conscience: This is the ideal life.”

Mark Twain

“You may not control all the events that happen to you, but you can decide not to be reduced by them.”

Maya Angelou

“Always remember that you are absolutely unique. Just like everyone else.”

Margaret Mead

“Everything you can imagine is real.”

Pablo Picasso

Guide to sub-class C blocks

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