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Short codes, or short numbers, are short digit-sequences—significantly shorter than telephone numbers—that are used to address messages in the Multimedia Messaging System (MMS) and short message service (SMS) systems of mobile network operators. [1] In addition to messaging, they may be used in abbreviated dialing.
Mobile phones use geographic area codes. Exchanges may service on mobile devices; local numbers are portable between wired and wireless carriers. While area code 600 has been established as a non-geographic code that can be used by mobile phones, the only significant mobile usage has been for satellite phone service in remote regions.
These dialing codes provide access to special local services, such as 911 for emergency services, which is a facility mandated by law in the United States. The FCC specified how the N11 codes of 211, 311, 511, 711 and 811 codes would be used for various types of public information under NANP. [7] [8] N11-numbers provide access to special services.
The term is a combination of "SMS" or "short message service" and "phishing," an umbrella term for social engineering attacks. What to do if you receive a toll road scam text.
When dialing a telephone number, the area code may have to be preceded by a trunk prefix or national access code for domestic calls, and for international calls by the international access code and country code. Area codes are often quoted by including the national access code. For example, a number in London may be listed as 020 7946 0321.
The FIPS standard includes both the codes for independent countries (similar but often incompatible with the ISO 3166-1 alpha-2 standard) and the codes for top-level subdivision of the countries (similar to but usually incompatible with the ISO 3166-2 standard). The ISO 3166 codes are used by the United Nations and for Internet top-level ...
Although a few abbreviations (such as SX for "dollar") are carried over from former commercial telegraph codes, almost all Morse abbreviations are not commercial codes. From 1845 until well into the second half of the 20th century, commercial telegraphic code books were used to shorten telegrams, e.g. PASCOELA = "Locals have plundered everything from the wreck."
External Short Messaging Entity (ESME) is an external application that connects to a Short Message Service Center (SMSC) to engage in the sending or receiving of SMS messages. The term was coined by Aldiscon. SME is a term used in many cellular circles to describe a network entity (mobile/cell phone) that can send/receive messages.