Number 00

A page of the Numeropedia - the Special Encyclopedia of Numbers

All Numbers & [0-9] 0 - 1  - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9  &  [...<0] - [0<...<1]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q - ...

... In Arithmetic, 1+1 = 2, in Computer Science, 1+1 = 0, but in Love, 1+1 = 1!

00          None/Never         Number 0         Number 0 in Math.

00

[Math.]  A number is divisible by 25 when it ends with 2 digits 00, 25, 50 or 75.

[Math.]  A number ending with 00 is divisible by 2, 4, 5, 10, 20, 25, 50 and 100.

[Phone]  The emergency telephone number dialing within Paraguay.

[Sport]  The ending time of a game at 0:00.

[Zip]  No U.S. Postal Zip Codes starts with 000nn, 001nn, 002nn, 003nn or 004nn.

There is only 2 U.S. Zip Codes starting with 00: Holtsville, New York 00501 and 00544. Coincidentally, the only 2 U.S. Postal Zip Codes starting with 055 are: Andover, Vermont 05501 and 05544.  (Remark: Puerto Rico is 006nn-007nn, 009nn and Virgin Islands 008nn).

[Zip]  A 5-digit U.S. Postal Zip Code never ends with 00.

000

[Library]  First 3 digits (000, 001, 002 and 003) in the Dewey Decimal Classification System call numbers for library books in General Knowledge.

[Phone]  The emergency telephone number dialing within Australia is 000 (and also 112 on cell phone).

[Phone]  The emergency telephone numbers dialing in Fiji are 000 and 911.

00, 00 & 0000

[Gov.]  A U.S. Social Security number has 9 digits, in the format: AAA-GG-SSSS, AAA is area number (indicating location issued, less than 750), GG is group number (indicating time issued, in the order of odd numbers under 10 (01, 03,…, 09), even numbers above 10 (10, 12,…,98), even numbers under 10 (02, 04,…, 08) and odd number above 10 (11, 13,…, 99)) and SSSS is serial number (0001 to 9999, assigned to local offices until 1972).

All 00, 000 and 0000 are invalid area number, group number and serial number, respectively.

0000 - 2400

[Military] Military time of a day set from midnight (0000) to midnight of the next day (2400), using 4-digit format hhmm, the first 2 digits hh for hours (from 00 to 24) and the last 2 digits mm minutes (from 00 to 59).