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Federated States Numbering Plan

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The Federated States Numbering Plan describes the allocation of phone numbers in the Federation, to be set forth by the Antarctic Telecommunications Authority.

Present numbering plan Overview[]

The Federation is divided into 36 geographic area codes, in no case crossing a state boundary. There are also 11 non-geographic area codes.

Local phone numbers are seven digits and area codes are two digits, with the exception of the toll-free "800" (which is technically 80-0xx-xxxx) and the premium "900" (which is technically 90-0xx-xxxx). These two area codes are the only instances in which a local prefix begins with the number 0 or 1. In all other cases, local prefixes begin with numbers 2 through 9.

The dialing plan includes the trunk digit "1" to call long distance within the country, for example 1-45-xxx-xxxx if calling Astoria, Alyeska from outside the 45 area code. Internationally, one would dial +693-45-xxx-xxxx if calling Astoria from outside the country. The trunk digit "1" replaces the "+693" country code in the domestic dialing sequence.

The international access code is "01". The format for dialing internationally from the Federation is 01+(country code)+(city/area code)+(phone number).

Component Name Number ranges Notes
+693 ITU country calling code "1" is the trunk code for accessing long-distance service between FSNP numbers. In an intra-FSNP context, numbers are usually written without the leading "+693"
NPA Numbering Plan Area Code Allowed ranges: [2-9] for the first digit, and [0-9] for second digit. Covers all FSA locations in Antarctica. The area code is often enclosed in parentheses.
NXX Central Office (exchange) code Allowed ranges: [2-9] for the first digit (except for 80 and 90 area codes), and [0-9] for second and third digits. Often considered part of a subscriber number. The three-digit Central Office codes are assigned to a specific CO serving its customers, but may be physically dispersed by redirection, or forwarding to mobile operators and other services.
xxxx Subscriber Number [0-9] for each of the four digits. This unique four-digit number is the subscriber number or station code.

For example:

  • (23) 456 7890 is valid
  • (800) 234 567 is valid
  • (900) 123 456 is valid
  • (12) 345 6789 is invalid, because NPA cannot begin with a "0" or"1"
  • (23) 123 4567 is invalid, because, NXX cannot begin with a "0" or "1" (except area codes 80 and 90)
  • (23) 911 1234 is invalid, because NXX cannot be "N11"

The country calling code for the FSNP is +693. In international format, an FSNP number should be listed thus: +693 22 555 0100 (example using the area code for McMurdo City). In a domestic format, the number should be listed: (22) 555-0100. "1" is the code used to make direct-dialed long-distance calls within the FSNP. However, the written format 1 22 555 0100 is incorrect (even though the dialing sequence is correct) because "1" is the country code for the North American Numbering Plan.

Each two-digit area code (except 800 and 900) may contain up to 7,919,900 unique phone numbers:

  • NXX may begin only with the digits [2-9], providing a base of 8 million numbers: ( 8 x 100 x 10000 ) .
  • However, the last two digits of NXX cannot both be 1, to avoid confusion with the N11 codes (subtract 80,000).
  • The usage of NXX "555" is reserved for fictional telephone numbers — see 555 (telephone number), except for 555-1212 (for directory assistance).

Geographic numbers[]

Area Codes

Area Code map of Antarctica

A listing of geographic area codes:

Non-geographic numbers[]

A listing of non-geographic area codes:

  • 40 Satellite phones
  • 50 Satellite phones
  • 60 Satellite phones
  • 70 Toll-free
  • 80 Toll-free
  • 800 Toll-free (followed by 6-digit phone number)
  • 85 Toll-free
  • 86 Toll-free
  • 87 Toll-free
  • 88 Toll-free
  • 90 Premium
  • 900 Premium (followed by 6-digit phone number)
  • 99 Government (toll-free)

Special numbers and codes[]

Some common special numbers in the FSNP:

  • 0 - Operator assistance
  • 1 - Long distance trunk digit
  • 00 - Long-distance operator assistance
  • 01 - International Access Code. (For all destinations outside the FSNP)
  • 10x xxxx - Used to select use of an alternative Interexchange carrier|long-distance carrier
  • 211 - Community information or social services.
  • 311 - City government or non-emergency police matters such as noise complaints, suspicious people, minor injuries and non-working streetlights and parking meters, etc.
  • 411 - Local telephone directory service
  • 511 - Public transportation schedule information
  • 611 - Telephone line repair service
  • 711 - Relay service for customers with hearing or speech disabilities
  • 811 - Non-urgent health services
  • 911 - Emergency phone number for fire department, ambulance, police etc.
  • (Area Code) + 555-1212 - Non-local directory service

There are also special codes, such as:

  • *51 A history of unanswered calls on a telephone number, useful for those who are not Caller ID subscribers.
  • *57 Used to "trace" harassing, threatening, abusive, obscene, etc. phone calls, and keep results of trace at phone company.
  • *66 To keep retrying a busy-line (see also Called party camp-on)
  • *67 Caller ID Block
  • *69 Call Return caller may press '1' to return call after hearing number
  • *70 Cancel call waiting on a call-by-call basis
  • *71 Three way calling, which lets a person talk to people in two different locations at the same time.
  • *74 Speed dialing, which allows someone to quickly dial any of eight frequently called numbers using a one-digit code, from any phone on their line. *75 allows a total of 30 speed-call numbers.
  • *82 Releases Caller ID block on a call-by-call basis
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