1. IMSI ADMINISTRATOR REPORT Telcordia Contact: Anne Walker 732-699-4204 6/6/01 An SAIC Company IMSI OVERSIGHT COUNCIL June 6-7, 2001

2. IMSI – 2 IMSI Administrator Report Current Code Assignments The 7 MCCs assigned to the US are 310-316 US created the Home Network Identifier (HNI) = MCC+MNC Codes Not Available for Assignment: 10/MCC - Per Section 8.4.2 of Guidelines, in order to support inter- networking with wireless network licensees requiring backward compatibility for existing mobile networks only identified by 10 digit MINs. Codes Assigned to GSM-based service providers - MCC 310: 87 - MCC 311: 10 - MCC 316: 2

3. IMSI – 3 IMSI Administrator Report Current Code Assignments (Cont’d) HNIs assigned to ANSI-41-based service providers - MCC 310: 29 HNIs Reserved for Canada out of MCC 310 - GSM-based service providers: 6 Assigned; 1 Unassigned - ANSI-4l based service providers: 12 Assigned; 9 Unassigned

4. IMSI – 4 IMSI Administrator Report Administrator’s Response to Agreements Reached At February 7-8, 2001 Meeting The MNC XXO assignment process for GSM operators is being continued by the Administrator GSM operators are not being assigned MNCs outside of MCC 310 by the Administrator The Administrator has begun the reclamation process for MNCs in MCC 310 in accordance with the Assignment Guidelines

5. IMSI – 5 IMSI Administrator Report Administrator’s Response to Agreements Reached Reclamation Process – MNC 310 Letters have been sent to 17 service providers (see handout) 5 responses received – 3 deployed, 2 reclaimed ISSUES: Does IOC want to proceed with reclamation process Some service provider addresses may be out of date and IOC review would be beneficial There is a request from Voicestream Wireless not to issue multiple codes to GSM-based service providers based on their return of codes from companies they have acquired in order to replenish the database

6. IMSI – 6 IMSI Administrator Report Administrator’s Response to Agreements Reached Issues Associated with MNC 311 Letters have been sent to 5 US-based service providers (see handout) 2 responses received – 1 deployed, 1 still considering deployment Letters have been sent to 3 island-based service providers within the NANP (see handout) 1 response received – code returned

7. IMSI – 7 IMSI Administrator Report Administrator’s Response to Agreements Reached Assignment Guideline Agreements Letter assigning HNI has been revised to request return of Form C, deployment confirmation (see handout) Form A has been revised to request applicants to advise area of service and whether GSM based, and a note added to remind applicants to attach copy of wireless license (see handout)