View source for Telephone numbers in Castadilla

{{Infobox country telephone plan
| country =              Rumahoki
| country_link =         Rumahoki
| continent =            Sarpedon
| map_image =            Rumahoki orthographic.svg
| map_caption =          Map of Rumahoki
| map_size =             200px
| map_alt = 
| nsn_length = 9, 12, 15
| number_format = 0X-COE-xxxx, 0X-NPA-COE-xxxx
| country_calling_code = 422
| international_prefix = 00
| trunk_prefix =         0
| regulator =            [[National Communications Institute|NCI]]
| dial_plan_type =       Closed  
}}

'''Telephone numbers in Rumahoki''' are administered by the [[National Communications Institute]] of [[Rumahoki]].

The NCI divides the territories of its members into numbering plan areas (NPAs) which are encoded numerically with a three-digit telephone number prefix, commonly called the area code. Each telephone is assigned a seven-digit telephone number unique only within its respective plan area. The telephone number consists of a three-digit central office code and a four-digit station number. The combination of an area code and the telephone number serves as a destination routing address in the {{wp|public switched telephone network}} (PSTN). For international call routing, the NCI has been assigned the international calling code 422.

==History==
Since at least the 1920s, the use of telephones have became widespread all across what would eventually become Rumahoki. Of course, back then each of the [[Delepasian]] nations have had their own numbering plans with some even exclusively using letters of the alphabet in lieu of numbers. This led to the [[Great operators' strike of 1931]] when operators went on strike due to them being exhausted from having to convert letters into the appropriate numbers. A direct consequence of this blackout was the establishment of the Delepasian Telephony Institute (now the NCI) in 1935 with the goal of regulating telephone numbers throughout the region to ensure easier communication and drastically reduce the burdens that operators had when converting these so-called "phone letters" into phone numbers. This meant that phones that exclusively dialed alphabetical letters were to be replaced by conventional numerical phones (although letterings were permitted via phonewords, this just meant that only numbers were to be dialed regardless). However, the numbering system wouldn't be completely standardised into how it's structured today until the formation of the [[Delepasian Commonwealth]] in 1976.

==Numbering plan==
The NCI numbering format may be summarised in the notation 0X-NPA-COE-xxxx

{| class=wikitable
! Component
! Name
! Number ranges
! Notes
|-
| PN
|Prefix Number Code
|Allowed ranges: [1-3], and [7-9].
|See [[Telephone numbers in Rumahoki#Prefixes|Rumahokian number prefixes]]
|-
| NPA
|Numbering Plan Area Code
|Allowed ranges: [1–9] for the first digit, and [0-9] for the second and third digits. When the second and third digits of an area code are the same, that code is called an easily recognizable code (ERC).
|Each state of [[Rumahoki]] has its own area code.
|-
| COE
|Central Office Exchange code
|Allowed ranges: [0–9] for the first digit, and [0–9] for both the second and third digits (however, the second digit of the exchange cannot be ''0'' if the first digit is also ''0'').
|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,  ''01-404-235-5678'' is a valid telephone number with area code 404, central office prefix 235, and line number 5678. The number ''404-009-5678'' is invalid, because the central office code must not be in the form 00N.  ''01-404-159-2653'' is invalid, because the office code must not begin with ''1''. ''01-123-234-5678'' is invalid, because the NPA must not begin with 0 or 1.

The [[country calling code]] for Rumahoki is ''422''. In international format, a Rumahokian number should be listed as {{gaps|+422|1|404|555|0100}}, where ''404'' is an area code, the trunk prefix is omitted, and ''1'' denotes a landline number.

Each three-digit area code has a capacity of 9,999,848 telephone numbers:
*COE may begin with the digits [0–9], providing a base of 10 million numbers: (10 × 100 × 10000).
*However, the first two digits of COE cannot both be 0, to avoid confusion with the {{wp|00N code}}s (subtract 10).
*Despite the widespread usage of COE ''555'' for fictional telephone numbers—see {{wp|555 (telephone number)}}—today, the only such numbers now specifically reserved for fictional use are ''555-0100'' through ''555-0199'', with the remaining ''555'' numbers released for actual assignment as information numbers (subtract 100).
*In individual geographic area codes, several other COE prefixes are generally not assigned: the home area code(s), adjacent domestic area codes and overlays, area codes reserved for future relief nearby, industry testing codes (generally COE 958 and 959) and special service codes (such as COE 950 and 976).

===Area Codes===
Here are the area codes within Mobius:
*'''248''' - [[Rosaria|Rosaría]]
*'''271''' - [[Bahia (Rumahoki)|Bahía]]
*'''295''' - [[Homberia|Hombería]]
*'''262''' - [[Rio Solo|Río Solo]]
*'''314''' - [[Lagocia|Lagocía]]
*'''305''' - [[Terregran]]
*'''342''' - [[Auxana]]
*'''327''' - [[Rios Gemelos|Ríos Gemelos]]
*'''383''' - 
*'''361''' - [[Inaua]]
*'''359''' - [[Ibimini]]
*'''338''' - [[Kauabimini]]
*'''374''' - [[Junu'úrinia Ba'andasi-Navidadia|Junu'úrinia Ba'andasi-Navidadía]]
*'''404''' - 
*'''451''' - 
*'''475''' - 
*'''506''' - [[Kalanatoa]]
*'''537''' - [[Na'aturie]]
*'''652''' - [[Federal District (Ruamhoki)|Santa Maria District]]

===Prefixes===
The "0" is the trunk prefix. If an international call were to be made, the zero would be omitted.

*'''00''' - Reserved for special numbers and codes
*'''01''' - Landline
*'''02''' - Mobile phone services
*'''03''' - Mobile phone services
*'''04''' - Reserved for future use
*'''05''' - Reserved for future use
*'''06''' - Reserved for future use
*'''07''' - Special services
*'''08''' - Special services
*'''09''' - Premium services

===Special numbers and codes===
Some special numbers in the Rumahokian system:
*000 - {{wp|Operator assistance}}
*0000 - {{wp|Long-distance operator}} assistance
*00 - International access code using direct dial (for all destinations outside Mobius)
*001 - International access code using operator assistance (for all destinations outside Mobius)
*002 - Local community information or social services
*003 - City government or non-emergency police matters
*004 - Local telephone directory service
*005 - Traffic, road, and tourist information
*006 - Telephone line repair service, {{wp|wireless operator}} customer service
*007 - Relay service for customers with hearing or speech disabilities
*008 - Non-urgent {{wp|telehealth}}/teletriage services
*009 - {{wp|Emergency telephone number}} - fire department, medical emergency, police
*0051 - A history of unanswered calls on a telephone number, useful for those who are not {{wp|Caller ID}} subscribers.
*0057 - Used to {{wp|Call tracing|trace}} harassing, threatening, abusive, obscene, etc. phone calls, and keep results of trace at phone company.
*0066 - To keep retrying a busy-line (see also {{wp|Called-party camp-on}})
*0067 - Caller ID Block
*0069 - Call Return caller may press '1' to return call after hearing number
*0070 - Cancel call waiting on a call-by-call basis
*0071 - Three-way calling, which lets a person talk to people in two different locations at the same time.
*0074 - Speed dial, which allows someone to quickly dial any of eight frequently called numbers using a one-digit code, from any phone on their line.
*0075 - Allows a total of 30 speed-call numbers with two digits.
*0077 - Activates Anonymous Call Rejection Service
*0082 - Releases Caller ID block on a call-by-call basis
*0087 - Deactivates Anonymous Call Rejection Service