| OB No. | | Position on | Rec. |
|---|
| 1125 | List of Signalling Area/Network Codes (SANC) | 01/06/2017 | Q.708 |
| 1125 | List of terrestrial trunk radio mobile country codes | 01/06/2017 | E.218(2017) |
| 1117 | List of Mobile Country or Geographical Area Codes | 01/02/2017 | E.212 |
| 1114 | List of Recommendation ITU-T E.164 assigned country codes | 15/12/2016 | E.164 |
| 1002 | List of Country or Geographical Area Codes for non standard facilities in telematic services | 15/04/2012 | T.35 |
| 976 | List of Data Country or Geographical Area Codes | 15/03/2011 | X.121 |
| 669 | Five-letter Code Groups for the use of the International Public Telegram Service | 01/06/1998 | F.1 |
