Identification Number Allocations
The SID (System Identification Number) is a 15 bit
number (0-32,767) transmitted by base stations that identifies a
wireless system that conforms to a TIA cellular or PCS standard.
The SID is used by mobiles to recognize when they are in their
home system (e.g. it controls the "roam" light).
Some newer phones may maintain a list of "preferred"
systems identified by their SID code. The SID may also modify some
signaling messages that are transmitted by mobiles.
In the wireless network, the SID is used for
billing purposes, as a unique identification of the system that is
serving a mobile (and that thus must be compensated for services
provided to roamers). Since it is easier to transmit a 16 bit
number on a network, a new range of SID's are available for
network purposes only (32,768-65,535). Some of these are used as
BIDs (Billing Identifiers), and are used to discriminate between
different portions of a system for accounting purposes. BIDs are
assigned by CIBERNET (+1-202-785-0081).
SID codes are assigned by
the national telecom regulator, a designated organization or,
failing that, by IFAST if the national authority is unwilling or
unable to perform this task or if the operator wants a range
directly from IFAST (e.g. a mobile satellite operator). If a country does not have
a SID range, or needs a larger range, they can apply to the IFAST
to have one of the reserved ranges listed below allocated. Not
every country that has been assigned a SID range is actually using
it (for example, GSM and NMT systems do not use the SID
identifier). IFAST has been allocating SID ranges since November
1997. Prior to that, SID ranges were allocated by TIA subcommittee TR-45.2.
SID codes are listed alphabetically by Country and
numerically. Countries marked with an asterisk are involved in a
SID conflict. Either a SID assigned to that country is being used
by another country, or that country is using a SID from another
country. Known SID conflicts are listed.
- Sorted by Country
- Sorted Numerically by Range
Table of National SID Assignments
An Excel spreadsheet with more detailed IRM (SID) information
is available to IFAST members. Membership is free to IRM/SID
assignees upon application, and costs $1000 per year to others.
For more information contact