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  2. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/finance/free-reverse-phone-lookup-8...

    5. GreatPeopleSearch. GreatPeopleSearch is a user-friendly free reverse phone number lookup site that provides searchers with fast and accurate results. It draws on publicly available national ...

  3. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    A reverse telephone directory (also known as a gray pages directory, criss-cross directory or reverse phone lookup) is a collection of telephone numbers and associated customer details. However, unlike a standard telephone directory, where the user uses customer's details (such as name and address) in order to retrieve the telephone number of ...

  4. Telephone numbers in the Philippines - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    The Philippines is assigned an international dialing code of +63 by ITU-T. Telephone numbers are fixed at eight digits for area code 02, and seven digits for area codes from 03X to 09X, with area codes fixed at one, two, or three digits (a six-digit system was used until the mid-1990s; four to five digits were used in the countryside).

  5. Telephone numbers in Australia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Australia

    To access numbers in the same area, it is necessary only to dial the eight digits concerned. To access a number in another area it is first necessary to dial the trunk code of 0, followed by the area code (2, 3, 7 or 8) and then the specific local number. The area codes do not exactly match state/territory boundaries.

  6. Reversed-phase chromatography - Wikipedia

    en.wikipedia.org/wiki/Reversed-phase_chromatography

    In this case, raising the pH of the phase mobile above 4–5 = pH (which is the typical pKa range for carboxylic groups) increases their ionization, hence decreases their retention. Conversely, using a mobile phase at a pH lower than 4 [31] will increase their retention, because it will decrease their ionization degree, rendering them less polar.

  7. Acid value - Wikipedia

    en.wikipedia.org/wiki/Acid_value

    Acid value. In chemistry, acid value ( AV, acid number, neutralization number or acidity) is a number used to quantify the acidity of a given chemical substance. It is the quantity of base (usually potassium hydroxide (KOH)), expressed as milligrams of KOH required to neutralize the acidic constituents in 1 gram of a sample.

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