NATIONAL
TELEPHONE NUMBERING PLAN
For
CAMBODIA
Prepared by :
Mr. Sok Nareth
Regulations Directorate
Under Guidance of
HE Koy Kim Sea
Under-Secretary of State
Approved by :
To be approved.
Minister
Date of Issue :
23May,2001, Issue 6
1
INTRODUCTION
1.1
This document is the master register of the national numbering plan for
Cambodia. It is an update of version 5.
1.2
While in a traditional network basic
telephony provided by wireline services dominate this is not the case in
Cambodia. There is going to be a mix of systems and a large proportion of the
future demand will be served by
wireless services such as cellular, WLL and other radio based services.
Furthermore the network will be supplied by a number of operators either working
under licensed arrangements or as a state enterprise.
2
STRUCTURE OF THE NUMBERING PLAN
2.1 The numbering plan is based on a
closed numbering scheme, with each subscriber having a fixed number of digits. The number consists of area codes or operator codes
corresponding to the province or the operator and the subscriber number
corresponding to individual subscriber numbers.
2.2 The advantages of the closed numbering scheme
are as follows :
1
All subscribers have a unique number
2
Additional number can be easily added when the initial saturation level
is attained.
2.3
This numbering plan conforms to the ITU recommendations CCITT E 63 and
reference is also made to the following CCITT recommendations:
1
CCITT Blue Volume II, Fascicle II.2 Geneva 1989:
2
Recommendation E.160 Definitions relating to national and international
numbering plans
3
Recommendation E.163 Numbering plan for international services
4
Recommendation E.166 Numbering plan interworking in the ISDN era.
2.4
The numbering plan is structured in the following manner.
a)
Number known by international community =
CC+NDC+SN
b)
Number known nationwide = NDC+SN
c)
Number known locally within an area
= SN
Where :
CC
Country Code (which is 855 for Cambodia)
NDC
National Destination Code or Area Code
SN
Subscriber Number
2.5
ISDN number assignments may be allocated at a later date from the range
of numbers available in the local ISDN exchanges. ISDN number by itself will not
identify the particular nature of service, type of connection or quality of
service required. An indication of parameters describing the service required by
the calling terminal will be included in a service identifier in the signaling
information. The service identifier is not considered to be part of the
numbering scheme. Identification within a subscribers installation of a point
beyond the ISDN boundary requires the transfer of address information from the
public network to the subscriber’s equipment either through identification by
an ISDN number or identification by an ISDN number plus additional address
information. All these issues could be decided as and when ISDN is introduced in
the network. All the dialed digits forming part of International number in pre-
ISDN or post ISDN era are always decimal digits 0 to 9.
2.6
Sending of Digits in Signaling Systems
In
the signaling system, either R2 or CCS7, all digits including the leading zeros
shall be sent.
3 FIXED PSTN AREA
CODES
3.1 For fixed PSTN (Public Switched
Telephone Network) including wire-line and wire-less networks the following Area
Codes apply. When calling from a different NDC, subscribers need to dial 0 as
the first digit before NDC.
Province
Area Code
20-22
Reserved
Phnom Penh
23
Kandal
24 (Takhmau is considered as part of Phnom Penh, i.e. 23)
Kampong Speu 25
Kampong Chhnang
26
27-29
Reserved
30-31
Reserved
Takeo
32
Kampot
33
Sihanoukville
34
Koh Kong
35
Kep
36
37-39
Reserved
40-41
Reserved
Kampong Cham 42
Prey Veng
43
Svay Rieng
44
45-49
Reserved
50-51
Reserved
Pursat
52
Battambang
53
Banteay Meanchey
54
Pailin
55
56-59
Reserved
60-61
Reserved
Kampong Thom 62
Siem Reap
63
Preah Vihear
64
Udar Meanchey 65
66-69
Reserved
70-71
Reserved
Kratie
72
Mondul Kiri
73
Stung Treng
74
Ratanakiri
75
76-79
Reserved
80-89
Reserved
3.2 Operator
Assigned Numbers
There
are currently 3 Fixed PSTN operators, namely MPTC, Camshin and Camintel. The
numbers allocated to the 3 operators are :
|
Number block |
Operator |
2XX XXX |
MPTC |
|
3XX
XXX |
Camshin |
|
4XX
XXX |
MPTC |
|
5XX
XXX |
Reserved for future digit expansion |
|
6XX
XXX |
Reserved for future digit expansion |
|
7XX
XXX |
MPTC |
|
8XX
XXX |
MPTC |
|
9XX
XXX |
Camintel |
Digits 5 and 6 are reserved for use in
the process of future digit expansion.
3.3
District Number Range
In order that calls made between Districts within an Area can be charged
at tariff levels different from the local call charge each District under the
same Area Code must have a distinct number range unless the operator does not
wish to apply different tariffs at District levels.
4
MOBILE SERVICES
4.1
The numbering for mobile networks is as follows :
1N + ABXXXX and
9N + ABXXXX
With
1N and 9N as
Mobile Operator code (NDC)
AB can be
used by each operator to identify the area of telephone registration.
Note 1 9N can take 92, 93 and 96-99 as shown in par 4.2.
Note 2 Historically AB was assigned to be the same as the Area
code contained in par 3.1 so that the then interconnect regulation could be
implemented. AB was 8X or 9X for Phnom Penh. Since the new interconnect
regulation does not require identification of area of registration AB can be
assigned by each operator except for roaming number as indicated in par 4.3.
4.2
As of today the Mobile Operator Access codes are :
010
Reserved
011
Camshin (Shinawatra) DCS 1800
012
CamGSM
013
Reserved
014
Camtel CDMA ( not use at present )
015
Casacom (Samart) NMT 900
016
Casacom (Samart) GSM 900
017
Reserved
018
Camtel AMPS
019
Reserved
090
Reserved
091 MPTC TLMRS (Trunked
Land Mobile Radio)
092 Mobitel Tango
service
093 Reserved
094 Maritime Radio
095 National paging
service
096-099
Reserved
4.3
Codes Used for International Roaming
4.3.1 The
following number is to be assigned by each GSM Mobile operator to a foreign
phone that has roamed to Cambodia.
1N11XXXX ( 012 11XXXX , 016 11XXXX , ....)
9N11XXXX Reserved
where 1N is the operator code specified in par 4.2 and XXXX is the number
assigned for each roamer phone, X can take digit 0-9. This is to enable that
phone to receive calls from foreign countries and for it to call other phones
locally in Cambodia.
5
SPECIAL SERVICE NUMBERS
100
Reserved
101
International test number for Transmission
102
International test number for 1 KHz tone
103
International test number for Loop back
104-109 Reserved
110-116 Reserved.
117
Police
118
Fire Service
119
Hospital
12XX
Telephone Operator numbers (see par.
7)
13X
Short code for Paging Service number (see par. 8)
14XY Operator short
codes where X is unique for one operator and Y is assigned by each operator
themselves except that Y=1 must be for General Enquiry and Y=2 must be for
Faults. The X's are assigned as follows :
140Y
Telecom
Cambodia, e.g.( Where Y=0,1,2,...,9 )
1400-1409
Reserved
141Y
Camshin