United Nations Security Council Resolution 242 was adopted unanimously by the UN Security Council on November 22, 1967, in the aftermath of the Six Day War.
It calls for "the establishment of a just and lasting peace in the Middle East which should include the application of both the following principles: (i) Withdrawal of Israeli armed forces from territories occupied in the recent conflict", "(ii) Termination of all claims or states of belligerency" and respect for the right of every state in the area to live in peace within secure and recognized boundaries.

It is one of the most commonly referenced UN resolutions in Middle Eastern politics.

243 is the sum of five consecutive prime numbers (41 + 43 + 47 + 53 + 59).

244 Muslims were killed during the Haj in 2004.

In the MARC format for records in online public access (library) catalogs, in which each type of information about a book (or other library material) is identified with a 3-digit number, 245 identifies the title of the item; most library catalog software requires that each record have at least a 245 tag.

NGC 246 is a fairly significant planetary nebula discovered by William Herschel in 1785.

The year 247 saw the first of the Gothic invasions of the Roman Empire.

ø - the symbol you get using ASCII code alt+0248

The M249 SAWS is lightweight, gas-operated, either magazine or disintegrating metallic link-belt fed, portable machine gun capable of delivering a large volume of fire.

As a Mandarin slang term, 250 is an insult meaning "stupid person" or "simpleton".

Visit all 251 towns in Vermont.

Oliver Hardy starred in 252 films without Stan Laurel

253 The Holden Monaro HT is a car manufactured in Australia. The '68 to '71 version had a V8 253 engine.

254 - New York City Broadway theater, and former discothèque is located at 254 West 54th Street in Manhattan.

Assembly #255 is an Organization for Magicians and persons interested in Magic

A byte is a unit of storage in a computer which contains 8-bits and can store 256 different values: 0 to 255

Lab 257: The Disturbing Story of the Government's Secret Plum Island Germ Laboratory
By Michael C. Carroll

258 is the sum of four consecutive prime numbers (59 + 61 + 67 + 71).

259

Two Five Nine (also known as 2 5 9) is a seven-man music group from Mesa, AZ.

260 Is the magic constant of the Franklin magic square devised by Benjamin Franklin

In the year 261, Gallienus repeals the edict of 257, which led to the persecution of the Christians.

The TV show Magnum PI had 262 episodes.

263 is an Eisenstein prime with no imaginary part.
whatever that means

264-year-old wreck of British warship found. Research indicates ship was carrying 4 tons of gold coins when it sank. (February 2, 2009)

265 is the 666th decimal of Pi in base 666, making it a hyper-evil number.

266

266 U.S. sailors die when the U.S.S. Mainr is destroyed by an explosion in the harbor at Havana, Cuba, on February 15, 1898.

This became the catalyst of the Spanish-American War and "Remember the Maine" became the U.S. battlecry.