1 Answers
A GSM Cell ID is a generally unique number used to identify each base transceiver station or sector of a BTS within a location area code if not within a GSM network.
In some cases the first or last digit of CID represents cells' Sector ID:
In UMTS, there is a distinction between Cell ID and UTRAN Cell ID. The UTRAN Cell ID is a concatenation of the RNC-ID and Cell ID. CID is just the Cell ID. The concatenation of both will still be unique but can be confusing in some cellid databases as some store the CID and other store LCID. It makes sense to record them separately as the RNC ID is the same for many cells, the unique element is the CID.
A valid CID ranges from 0 to 65535 on GSM and CDMA networks and from 0 to 268,435,455 on UMTS and LTE networks.