ITU Operational Bulletin www.itu.int/itu-t/bulletin
No. 1115	1.I.2017	(Information received by 12 December 2016) ISSN 1564-5223 (Online)
Place des Nations CH-1211 Genève 20 (Switzerland) Tel: +41 22 730 5111 E-mail: itumail@itu.int		Standardization Bureau (TSB) Tel: +41 22 730 5211 Fax: +41 22 730 5853 E-mail: tsbmail@itu.int / tsbtson@itu.int	Radiocommunication Bureau (BR) Tel: +41 22 730 5560 Fax: +41 22 730 5785 E-mail: brmail@itu.int

Table of Contents

GENERAL INFORMATION

Lists annexed to the ITU Operational Bulletin: Note from TSB

Approval of ITU-T Recommendations

Telephone Service:

Costa Rica (Superintendencia de Telecomunicaciones (SUTEL), San José)

Trinidad and Tobago (Telecommunications Authority of Trinidad and Tobago (TATT), Barataria)

Service Restrictions

Call – Back and alternative calling procedures (Res. 21 Rev. PP – 2006)

AMENDMENTS TO SERVICE PUBLICATIONS

List of Issuer Identifier Numbers for the International Telecommunication Charge Card

Mobile Network Codes (MNC) for the international identification plan for public networks and subscriptions

List of ITU Carrier Codes

List of International Signalling Point Codes (ISPC)

National Numbering Plan