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  2. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...

  3. Defense Switched Network - Wikipedia

    en.wikipedia.org/wiki/Defense_Switched_Network

    The Defense Switched Network ( DSN) is a primary information transfer network for the Defense Information Systems Network (DISN) of the United States Department of Defense. The DSN provides the worldwide non-secure voice, secure voice, data, facsimile, and video teleconferencing services for DOD Command and Control (C2) elements, their ...

  4. 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 ...

  5. Google announces new scam detection tools that provide real ...

    www.engadget.com/google-announces-new-scam...

    Google just announced forthcoming scam detection tools coming to Android phones later this year, which is a good thing as these scammers keep getting better and better at parting people from their ...

  6. Avoid Answering Calls from These Area Codes: Scam Phone ... - AOL

    www.aol.com/avoid-answering-calls-area-codes...

    Scam phone numbers: International Area Codes with a +1 Country Code. 232—Sierra Leone. 242 — Bahamas. 246 — Barbados. 268 — Antigua. 284 — British Virgin Islands. 345 — Cayman Islands.

  7. R-S-T system - Wikipedia

    en.wikipedia.org/wiki/R-S-T_system

    The R-S-T system is used by amateur radio operators, shortwave listeners, and other radio hobbyists to exchange information about the quality of a radio signal being received. The code is a three digit number, with one digit each for conveying an assessment of the signal's readability, strength, and tone. [1] [2] The code was developed in 1934 ...

  8. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

  9. List of dialling codes in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_dialling_codes_in...

    List of dialling codes [ edit] Short codes. 02x yyyy yyyy [eight-digit local number] 011x yyy yyyy [seven-digit local number] 01x1 yyy yyyy [seven-digit local number] 020 to 029. 0113 to 0119. 0121 to 0191. 020.

  10. National Codification Bureau - Wikipedia

    en.wikipedia.org/wiki/National_Codification_Bureau

    The Federal Stock Number (FSN) was the codification system used by the US Government from 1957 to 1974. It was 11 digits long and was the same number as the NSN (see National Stock Number), minus the two-digit NCB code. The digits "00" were later added in the place of the NCB digits to virtually all FSN numbers to create compliant American 13 ...

  11. Area codes 718, 347, and 929 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_718,_347,_and_929

    Area code 929 became effective on April 16, 2011. This had the effect of assigning 23.4 million numbers to an area of 6.7 million people. As of April 2023, NPA 347/718/929 has a projected exhaustion date of the second quarter of 2027. Area code 917 overlays area codes 718, 347, and 929, as well as area codes 212, 646 and 332 in Manhattan.